Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Civil and Environmental Engineering (81)
- Structural Engineering (57)
- Physical Sciences and Mathematics (44)
- Aerospace Engineering (35)
- Computer Sciences (30)
-
- Electrical and Computer Engineering (24)
- Social and Behavioral Sciences (23)
- Computer Engineering (22)
- Computer Law (13)
- Forensic Science and Technology (13)
- Information Security (13)
- Law (13)
- Legal Studies (13)
- Life Sciences (10)
- Environmental Engineering (4)
- Environmental Sciences (4)
- Power and Energy (4)
- Science and Technology Studies (4)
- Digital Communications and Networking (3)
- Engineering Science and Materials (3)
- Library and Information Science (3)
- Materials Science and Engineering (3)
- Medicine and Health Sciences (3)
- Biomedical Engineering and Bioengineering (2)
- Business (2)
- Chemical Engineering (2)
- Education (2)
- Electromagnetics and Photonics (2)
- Electronic Devices and Semiconductor Manufacturing (2)
- Institution
- Keyword
-
- Cold-formed steel (4)
- Cold-formed steel structures (2)
- Finite element analyses (2)
- Genetic algorithm (2)
- LiteSteel beams (2)
-
- Optimization (2)
- Portal frame (2)
- Shear capacity (2)
- Web openings (2)
- Absorption; Metamaterials; Solar energy--Research; Spectrum (1)
- Acceleration (1)
- Adaptive routing (Computer network management) (1)
- Adjustment (1)
- Alloys--Thermal properties; Nanostructured materials; Thermal conductivity (1)
- Application software--Development; Cell phones; Transportation--Technological innovations (1)
- Arithmetic--Computer programs; Binary-coded decimal system; Decimal system (1)
- Automation of plastering machine (1)
- BOD (1)
- Barley (1)
- Basin (1)
- Bioengineering; Electromagnetic fields; Neural stimulation--Therapeutic use; Parkinson's disease--Treatment (1)
- Biometric identification; Classifiers (Linguistics)--Data processing; Human face recognition (Computer science) (1)
- Bracing member (1)
- Braille--Data processing (1)
- Building industrialisation (1)
- COD (1)
- Chromium alloys--Analysis; Nuclear power plants--Materials; Oxide coating (1)
- Cold formed steel; shear connector; ductility; strength resistance; composite beam; push test (1)
- Cold-formed steel structures. (1)
- Cold-formed steel; Web crippling; Finite element analysis; Web openings; Channel section (1)
- Publication
-
- CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018) (56)
- Ablation Workshop (35)
- College of Engineering: Graduate Celebration Programs (21)
- International Junior Researcher and Engineer Workshop on Hydraulic Structures (19)
- Annual ADFSL Conference on Digital Forensics, Security and Law (13)
-
- UBT International Conference (11)
- Kentucky Water Resources Annual Symposium (9)
- NSTec UNLV Symposium (4)
- Hong Kong Innovative Users Group Meetings (3)
- Changing World Conference (1)
- Continuing Legal Education Presentations (1)
- Modeling, Simulation and Visualization Student Capstone Conference (1)
- Undergraduate Student Symposium (1)
Articles 1 - 30 of 175
Full-Text Articles in Engineering
Material Balance Adjustement In Raw Material Processing, Migena Hoxha, Piro Zoga, Aida Bode
Material Balance Adjustement In Raw Material Processing, Migena Hoxha, Piro Zoga, Aida Bode
UBT International Conference
Circuit of one processing plant was studied in order to adjust the mass balance. The granulometric composition of the streams that belong to grinding and classifying processes was analysed, while the chemical content was determined only at the streams related to separation process. Three connection matrixes are considered in this paper, one corresponding to the size fraction equations, the second corresponding to the chemical content measurements and the third, the solid flow rate balance. The technique used consisted of filtering all the data by a weighted least-squares procedure. Then running the output data in a custom designed feature of the …
Dynamic Modeling And Analysis Of Propulsion Effect Of 3 Dof Robot, Ahmet Shala, Xhevahir Bajrami
Dynamic Modeling And Analysis Of Propulsion Effect Of 3 Dof Robot, Ahmet Shala, Xhevahir Bajrami
UBT International Conference
Dynamical Modeling of robots is commonly first important step of Modeling, Analysis and Control of robotic systems. This paper is focused on using Denavit-Hartenberg (DH) convention for kinematics and Newton-Euler Formulations for dynamic modeling of 3 DoF - Degree of Freedom of 3D robot. The process of deriving of dynamical model is done using Software Maple. Simulations are done using Matlab/Simulink for analysis of propulsion effect under Earth gravity when First Link rotates with 1000 rpm, second Link can move free in vertical direction and Third Link can rotates free around their rotations axle. Simulations results shows very good propulsion …
The Effectiveness Of The Use Of Solar Panels In Hotels Of Durres Area, Asllan Hajderi, Shkelqim Gjevori
The Effectiveness Of The Use Of Solar Panels In Hotels Of Durres Area, Asllan Hajderi, Shkelqim Gjevori
UBT International Conference
In the present study is analyzing the case of the application of solar energy with vacuum tube collectors for heating water for sanitary needs in hotels of Durres areas. In recent years there has been a special interest by the leading authorities to the EU countries and the U.S., for the use of renewable energies in general and solar energy in particular. This is mainly related with the reduction of environmental pollution from gas CO2, which directly influences the greenhouse effect and global warming. Unlike other forms of renewable energy, like wind turbines, photovoltaic panels and biomass usages, the use …
Water Resources Systems Planning And Management, Piro Zoga, Aida Bode, Ramiz Balla, Nevton Kodhelaj, Spartak Kucaj
Water Resources Systems Planning And Management, Piro Zoga, Aida Bode, Ramiz Balla, Nevton Kodhelaj, Spartak Kucaj
UBT International Conference
The most fundamental human needs of water are for drinking, cooking and personal hygiene. In order to fulfill these needs, the quality of the water used should cause no risk to human health. The quality of the water in nature also affects the condition of ecosystems all living organisms depend on. At the same time, humans use water bodies as convenient sinks for the disposal of domestic, industrial and agricultural wastewaters. This, of course, degrades the quality of those water bodies. Water resources management involves the monitoring and management of water quality as much as the monitoring and management of …
Nanotechnology And His Effects In Medicine, Hatixhe Bilibashi
Nanotechnology And His Effects In Medicine, Hatixhe Bilibashi
UBT International Conference
Nanotechnology is a great revolution in the field of information technology that has effects on almost every aspect of the human society nowadays. It is one of the technologies with huge potentials in many directions. Nanotechnology can be defined as the manipulation, precision-placement, modeling and manufacture of material at the nanometer scale (One meter consists of 1 billion nanometers) ( 10〗^(-9) of a meter). ).Therefore nanotechnology can help save the lives of many people. Main fields in medicine where nanotechnology can be found are the control and prevention of cancer, diagnostication of the drug dependance, diagnostication of the diabet es, …
Advancement Of The Plastering Machine, Bujar Ademi, Peter Kopacek
Advancement Of The Plastering Machine, Bujar Ademi, Peter Kopacek
UBT International Conference
Automation of water flow at plastering machines is a solution which serves the process of plastering, to adhere international standards.Automation of water flow by taking signals from the condition of the material depending on humidity. So its output is used to influence the increase or decrease of the amount of water flow in the valve.Water flow automation is a system which consists of several components in which the already, develop different processes. To realese the feedback we need a sensor which is built by piezoelemnt in which we have the phenomenon of the frequency. With which we have to create …
Urban Waste Water Discharges And Their Treatment: Case Study Waste Water Treatment Plant Of Kavaja (Wwtpk), Aida Bode, Nevton Kodhelaj, Piro Zoga, Doriana Xhulaj
Urban Waste Water Discharges And Their Treatment: Case Study Waste Water Treatment Plant Of Kavaja (Wwtpk), Aida Bode, Nevton Kodhelaj, Piro Zoga, Doriana Xhulaj
UBT International Conference
WWTPK is the first plant built sewage purification in the Republic of Albania (RA). This plant it is placed in the Kavaja region, district of Tirana. For this is an important area sewage treatment and waste water treatment according to the standards of the Ministry of Environment, Forestry and Water Management (MoE) in Republic of Albania and not directly discharged untreated in nature. In order to determine productivity of the IPUZ and to predict the future of the operation, the results of the analysis of BOD, COD, SS are produced. According to chemical analyzes carried out in the period from …
Research Of Agronomic And Quality Traits Of Winter Barley Varieties (Hordeum Vulgare L.) Under Growing Conditions In The Republic Of Kosovo, Nexhdet Shala, Bakir Kelmendi
Research Of Agronomic And Quality Traits Of Winter Barley Varieties (Hordeum Vulgare L.) Under Growing Conditions In The Republic Of Kosovo, Nexhdet Shala, Bakir Kelmendi
UBT International Conference
The object of this paper is the research of agronomic and quality trains of winter varieties (hordeum vulgare L.) their adaptability and specific reactions towards growing conditions in the Republic of Kosovo. During three year trails on localities in Dukagjini area and area of Kosovo we researched 5 winter barley varieties. Environment has been explored together with estimation of significant parameters of grain yield, hectoliter weight, protein and starch content. Impact of year, location and variety on grain yield, hectoliter grain weight, protein and starch content has been estimated by analysis of variance. Environmental effects of planting barley cultivars in …
Mechatronics And Mechatronics Management, Peter Kopacek
Mechatronics And Mechatronics Management, Peter Kopacek
UBT International Conference
Mechatronics bringing together a number of technologies mechanical engineering, control engineering, electrical engineering, electronic engineering,computer technology. Mechatronics as an umbrella integrates areas of technology like measurement systems and sensors, actuation systems and drives, systems behavior, control, and microprocessor systems. Education in Mechatronics is highly interdisplinary. Graduates with a BSc or MSc degree in Mechatronics get usually higher or medium management positions in Industry requiring some knowledge in management. Therefore an education program ―Mechatronics Management‖ was developed by an international consortium and implemented at UBT in Prishtina
Computer Aided Analysis Of Kinematics And Kinetostatics Of Six-Bar Linkage Mechanism Through The Contour Method, Qelaj Mehmet, Likaj Ramë
Computer Aided Analysis Of Kinematics And Kinetostatics Of Six-Bar Linkage Mechanism Through The Contour Method, Qelaj Mehmet, Likaj Ramë
UBT International Conference
In this paper is presented a six-bar linkage mechanism of the pump for oil extrusion. In this mechanism are introduced even higher kinematic pairs. Dimensions and other incoming links will be adopted as necessary. For the six-bar linkage mechanism will be carried out the kinematic analysis and for all linkages will be presented the displacement, velocity and acceleration. The analysis will be performed by MathCad software, while kinetostatic analysis will be carried out using Contour Method, comparing results of two different software‘s MathCAD and Working Model. The simulation parameters will be computed for all points of the contours of mechanism.
The Surface Distribution Of Oil Spills, The Environmental Status Of The Visoka Oilfield, Its Rehabilitation Ways: Case Study, Nevton Kodhelaj, Aida Bode, Piro Zoga, Nevina Koja, Esmeralda Zeqo, Dulian Zeqiraj
The Surface Distribution Of Oil Spills, The Environmental Status Of The Visoka Oilfield, Its Rehabilitation Ways: Case Study, Nevton Kodhelaj, Aida Bode, Piro Zoga, Nevina Koja, Esmeralda Zeqo, Dulian Zeqiraj
UBT International Conference
Visoka oilfield was explored in 1963 through the well G-622. In this oilfield had been drilled more than 170 production wells. Through all this years of its exploitation, mainly because of the outdated technology, the environmental pollution reached really dramatic values. The pollution extends on the Visoka village, affecting so the life for the entire community. The oil spills, the gas emissions and the formation water affected and polluted and ―k illed‖ the Gjanica River, its delta and the Adriatic coast in the Semani beach. Due to the technology and the completely wrong policies, used in the past, the wells …
Definition Of Common Conventions For Education Of Cfs System Design, Semih Göksel Yıldırım
Definition Of Common Conventions For Education Of Cfs System Design, Semih Göksel Yıldırım
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
CFS system of which can be used in the field of low rise residentials, are included in industrialised building systems due to installation principles of the system. Widespreading of the usage of an industrialised building system depends on the widespreading of the system design datum. Therefore, education of CFS system design is required in order to increase the system usage. Also, awareness of CFS system in the levels of public authorities and technical staff can be increased by education. The aim of this paper is to develop an education model for CFS system design by using open building concept. The …
Numerical And Experimental Investigation Of Cold-Formed Steel Double Angle Members Under Compression, W. F. Maia, L. C. M. Vieira Jr., B. W. Schafer, M. Malite
Numerical And Experimental Investigation Of Cold-Formed Steel Double Angle Members Under Compression, W. F. Maia, L. C. M. Vieira Jr., B. W. Schafer, M. Malite
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper presents a numerical and experimental study of double angle members connected by batten plates under concentric and eccentric axial compression. The number of batten plates is varied to study the influence on the nominal axial strength. Numerical analyses are able to accurately predict the behavior and strength found in the experiments, except for long columns under eccentric axial compression where the composite section failed in major-axis flexural buckling. Two design hypotheses are compared to the results obtained: (i) non-composite action (no interaction between angles), with only local, flexural, and flexural-torsional buckling considered; (ii) composite action (full interaction between …
The 1st Student Competition On Cold-Formed Steel Design, Cheng Yu, Cristopher Moen
The 1st Student Competition On Cold-Formed Steel Design, Cheng Yu, Cristopher Moen
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
The first Student Competition on Cold-Formed Steel Design (CFS Competition) was held at the University of North Texas in 2011. The CFS Competition was initiated by Cheng Yu through a National Science Foundation CAREER award. The objective of the CFS Competition is to promote higher education in coldformed steel structural design and to encourage students to use creative thinking skills to solve engineering problems. The subject of the first CFS Competition is to design an optimal thin-walled cold-formed steel cross section under several pre-defined restrictions. The CFS Completion received total 78 entries from students in 5 different countries. The judging …
Compression-Tension Hysteretic Response Of Cold-Formed Steel C-Stection Framing Members, D. Padilla-Llano, C. D. Moen, M. Eatherton, L. Mcanallen, T. Bruce
Compression-Tension Hysteretic Response Of Cold-Formed Steel C-Stection Framing Members, D. Padilla-Llano, C. D. Moen, M. Eatherton, L. Mcanallen, T. Bruce
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper summarizes results from an experimental program designed to evaluate the tension-compression cyclic axial response of cold-formed steel C-section structural framing members. A new cyclic loading protocol for cold formed steel members is presented that defines the target axial displacement based on elastic buckling parameters. The protocol is used to explore the cyclic response of members experiencing local buckling, distortional buckling, and global buckling deformation. In the experiments, post-bucking energy dissipation was observed along with tension stretching and softening. The quantity of dissipated energy per cycle increased as cross-section and global slenderness decreased. Specimens experiencing local and distortional buckling …
Load Distribution In Floor To Wall Connections, D. M. Fox, D. R. Knill, R. M. Schuster
Load Distribution In Floor To Wall Connections, D. M. Fox, D. R. Knill, R. M. Schuster
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Presented in this paper is a cold formed steel load distribution system developed by iSPAN Systems LP that enables the installation of floor joists without the need to align them with the supporting wall studs. The floor joists are supported by a shear connection attached to a cold formed steel perimeter distribution member. In addition to the load distribution aspect, the system results in a simplified lateral design approach. An experimental verification study was carried out to establish the load distribution capability of the system, resulting in a simplified procedure to determine the connection requirements and load transfer characteristics to …
Towards The Design Of Cold-Formed Steel Foam Sandwich Columns, S. Szyniszewski, B. H. Smith, V. M. Zeinoddini, J. F. Hajjar, S. R. Arwade, B. W. Schafer
Towards The Design Of Cold-Formed Steel Foam Sandwich Columns, S. Szyniszewski, B. H. Smith, V. M. Zeinoddini, J. F. Hajjar, S. R. Arwade, B. W. Schafer
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
In this paper a design method for the compressive capacity of sandwich panels comprised of steel face sheets and foamed steel cores is derived and verified. Foamed steel, literally steel with internal voids, provides the potential to mitigate many local stability issues through increasing the effective width-to thickness of the component for the same amount of material. Winter’s classical effective width expression was generalized to the case of steel foam sandwich panels. The provided analytical expressions are verified with finite element simulations employing brick elements that explicitly model the steel face sheets and steel foam cores. The closed-form design expressions …
Dynamic Time-History Analysis On Wind-Induced Response Of Light-Weight Roof System, X. K. Jing, Y. Q. Li, D. J. Gong
Dynamic Time-History Analysis On Wind-Induced Response Of Light-Weight Roof System, X. K. Jing, Y. Q. Li, D. J. Gong
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Severe damage to light-weight roof system occur when exposed to strong wind loading. Damage investigations and wind load-bearing capacity tests of light-weight roof system reveal that the connection damage of roof sheeting and fastener is the most serious. Wind pressure distributions on the roof of gabled steel frame measured in a wind tunnel are described. Secondly, illustrated by the example of the classic standing-lock roof system, the wind-induced forces for the concealed clips estimated by the building code and time-history analysis based on wind tunnel test, respectively, are compared. The results indicate that the uniform gust factor used in the …
Experimental Analysis Of Beam-To-Upright Connections In Cold-Formed Steel Storage Pallet Racks, Tuo Wang, Xianzhong Zhao, Yiyi Chen
Experimental Analysis Of Beam-To-Upright Connections In Cold-Formed Steel Storage Pallet Racks, Tuo Wang, Xianzhong Zhao, Yiyi Chen
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
A research program is currently in progress at Department of Building Engineering of Tongji University with the aim of investigating the behavior of cold-formed steel storage pallet racks under static and dynamic loading. This paper presents preliminary experimental analysis on the monotonic behavior of beam-to-upright connections. In the experimentation, the set-up was specially designed to accommodate precise requirement of boundary conditions and the measurement method was refined from the general ones used in rack design codes. It is shown that deformation modes of the connections were similar before failure while the failure modes were different depending on the specific constructional …
Experimental And Numerical Investigations Of High Strength Cold-Formed Lapped Z Purlins Under Combined Bending And Shear, Cao Hung Pham, Annabel F. Davis, Bonney R. Emmett
Experimental And Numerical Investigations Of High Strength Cold-Formed Lapped Z Purlins Under Combined Bending And Shear, Cao Hung Pham, Annabel F. Davis, Bonney R. Emmett
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Plain C or Z- sections are two of the most common cold-formed steel purlins in use for roof systems throughout the world. Especially for Z- sections, their lapping ability provides continuity and double thickness material at the support regions results in greater performance and more economical designs. At the region just outside the end of the lap, the purlin may fail under a combination of high bending and shear. Design methods for these sections are normally specified in the Australian/New Zealand Standard for Cold-Formed Steel Structures (AS/NZS 4600:2005) or the North American Specification for Cold- Formed Steel Structural Members (2007). …
Mechanisms Of Block Shear Failure Of Bolted Connections, Lip H. Teh, Drew D. A. Clements
Mechanisms Of Block Shear Failure Of Bolted Connections, Lip H. Teh, Drew D. A. Clements
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper examines the mechanisms for block shear failure postulated in the design provisions specified in the North American Specification for the Design of Cold-formed Steel Structural Members 2007 and AS/NZS 4600:2005 Coldformed Steel Structures. It explains that there is only one feasible mechanism for the limit state of conventional block shear failure, that which involves shear yielding and tensile rupture. It proposes an equation that provides more accurate results compared to the code equations in predicting the block shear capacities of bolted connections in steels having minimal strain hardening. A resistance factor of 0.8 for the proposed equation is …
An Efficient Genetic Algorithm For The Design Optimization Of Cold-Formed Steel Portal Frame Buildings, Duoc T. Phan, James B. P. Lim, Tiku T. Tanyimboh, Wei Sha
An Efficient Genetic Algorithm For The Design Optimization Of Cold-Formed Steel Portal Frame Buildings, Duoc T. Phan, James B. P. Lim, Tiku T. Tanyimboh, Wei Sha
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
The design optimization of cold-formed steel portal frame buildings is considered in this paper. The real-coded genetic algorithm (GA) optimizer proposed considers both building’s topology (i.e. frame spacing and pitch) and cross-sectional sizes of the main structural members as the decision variables that are optimized. Previous GAs in the literature were characterized by poor convergence including slow progress that usually results in excessive computation times and/or frequent failure to achieve an optimal or near-optimal solution. This is the main issue addressed in this paper. In an effort to improve the performance of the conventional GA, a niching strategy is presented …
Studies On Bracing Member End Connections For Cold Formed Steel Sections, R. P. Rokade, N. Prasad Rao, R. Balagopal, S. J. Mohan
Studies On Bracing Member End Connections For Cold Formed Steel Sections, R. P. Rokade, N. Prasad Rao, R. Balagopal, S. J. Mohan
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper is concentrated mainly on the behaviour of bracing end connections for cold formed steel lipped angle and lipped channel sections. For bracing members, only one flange is possible to connect with tower leg member or supporting member, which causes uneven distribution of stresses in the end section popularly known as shear lag effect. Tension tests have been carried out to simulate the bracing end connections. Special test rig has been assembled and end fittings fabricated such that the load will be applied as concentric load at the pulling end and on the other end load is transferred through …
Permanent Stability Bracing Of Cfs Trusses, Sowri Rajan, William L. Babich
Permanent Stability Bracing Of Cfs Trusses, Sowri Rajan, William L. Babich
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Permanent stability bracing of Cold-Formed Steel (CFS) roof/floor trusses is needed for the three major planes in a truss: Top chord, Bottom Chord and Web. Primary function of bracing is to prevent lateral instability of members as well as stiffen the overall roof/floor system. Brace force is dependent on the magnitude of applied loads and the level of out-of-planeness permitted. Traditionally, 2% of the axial compression force in a member is used as the brace (restraint) force, which is based on an out-of-plane deflection of L/200 where L is the member length. Continuous Lateral Restraint (CLR) forces are accumulated from …
Steel Cold-Formed Trussed Girders With Joint Eccentricities - Improvements On Design And Performance By Numerical And Experimental Analysis, Eduardo De M. Batista, Alexandre Landesmann, Juarez M. Franco
Steel Cold-Formed Trussed Girders With Joint Eccentricities - Improvements On Design And Performance By Numerical And Experimental Analysis, Eduardo De M. Batista, Alexandre Landesmann, Juarez M. Franco
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Long span light roof systems of industrial buildings are frequently designed with cold-formed steel members, leading to competitive solution which allows liberating useful internal space inside the building. This type of structural solution is usually cost saving if it is combined with standardization of the manufacturing process thus enabling specialized solution. This is the case of a family of trussed girders ranging from 0.6 to 1.8 m depth, developed by the steel structures manufacturer and addressed to a standard system for general application enabling to bridge up to 40 m span of light roof construction. Typical buckling behavior of the …
Slip Modulus Of Cold-Formed Steel Members Sheathed With Wood Structural Panels, A. L. Northcutt, K. W. Kramer, S. F. Stephens
Slip Modulus Of Cold-Formed Steel Members Sheathed With Wood Structural Panels, A. L. Northcutt, K. W. Kramer, S. F. Stephens
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Cold-formed steel framing sheathed with wood structural panels is a common method of construction for wall, roof and floor systems in cold-formed steel structures. Since wood structural panels are attached with screws at relatively close spacing, a certain amount of composite behavior will be present. The benefit of composite behavior is not currently being taken advantage of in the design of these structural systems. While composite effects are present, they are not yet being accounted for in design due to a lack of statistical data. To determine the amount of composite action taking place in these systems, the slip modulus …
Modal Identification Of Cold-Formed Steel Members In Shell Finite Element Models, Z. Li, S. Ádány, B. W. Schafer
Modal Identification Of Cold-Formed Steel Members In Shell Finite Element Models, Z. Li, S. Ádány, B. W. Schafer
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper illustrates new capabilities for modal identification of shell Finite Element Method (FEM) models of thin-walled cold-formed steel members. The separation of general deformations into fundamental buckling deformation classes: local, distortional, global, shear, and transverse extension, originated with the constrained Finite Strip Method (cFSM) and is extended here to shell element based FEM analysis. The cFSM base vectors for general end boundary conditions, previously developed by the authors, provide a series of general base functions capable of separating displacements into classes. FEM displacements are identified by minimizing error between the actual FEM displacements and those predicted by the cFSM …
Analytical Model For Cold-Formed Steel Framed Shear Wall With Steel Sheet Sheathing, Noritsugu Yanagi, Cheng Yu
Analytical Model For Cold-Formed Steel Framed Shear Wall With Steel Sheet Sheathing, Noritsugu Yanagi, Cheng Yu
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
The cold-formed steel framed shear wall sheathed with steel sheet sheathing (CFS-SSSW) is a code approved lateral force resisting system for light framed construction. The AISI Steel Framing Standards – Lateral Design (AISI S213-07) provides design provisions for CFS-SSSW. The development of the nominal strength of CFS-SSSW in AISI S213 was based on full-scale experiments which were subjected to limitations in both wall configurations and material properties. This paper presents an analytical model – the Effective Strip Model developed for predicting the nominal strength of CFS-SSSWs. The proposed analytical model and supporting design equations are further verified by experimental results. …
Constrained Shape Optimization Of Cold-Formed Steel Columns, J. Leng, Z. Li, J. K. Guest, B. W. Schafer
Constrained Shape Optimization Of Cold-Formed Steel Columns, J. Leng, Z. Li, J. K. Guest, B. W. Schafer
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
The objective of this paper is to introduce appropriate constraints in the shape optimization of a cold- formed steel column such that the resulting optimized shapes retain the strength benefits of unconstrained optimal solutions combined with practical manufacturing and constructional needs. Unconstrained shape optimization of cold-formed steel columns, where the cross-section that maximizes axial capacity is found, has previously been performed. Here, practical manufacturing and construction constraints are introduced into the optimization algorithm. Members with three lengths: 2 ft, 4 ft, and 16 ft, are considered. Optimized sections from multiple runs show uniformity and bear a close resemblance to unconstrained …
Finite Element Analyses Of Lipped Chanel Beams With Web Openings In Shear, P. Keerthan, M. Mahendran
Finite Element Analyses Of Lipped Chanel Beams With Web Openings In Shear, P. Keerthan, M. Mahendran
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Cold-formed steel members are increasingly used as primary structural elements in buildings due to the availability of thin and high strength steels and advanced cold-forming technologies. Cold-formed lipped channel beams (LCB) are commonly used as flexural members such as floor joists and bearers. Shear behaviour of LCBs with web openings is more complicated and their shear capacities are considerably reduced by the presence of web openings. However, limited research has been undertaken on the shear behaviour and strength of LCBs with web openings. Hence a numerical study was undertaken to investigate the shear behaviour and strength of LCBs with web …