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Articles 1 - 30 of 644
Full-Text Articles in Engineering
Agenda For Second Meeting Of The Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash
Agenda For Second Meeting Of The Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash
Forum for Promotion of Soil Dynamics in India
No abstract provided.
Membership Of Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash
Membership Of Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash
Forum for Promotion of Soil Dynamics in India
No abstract provided.
Center Of Excellence In Geotechnical Earthquake Engineering And Soil Dynamics At Iit Roorkee, Shamsher Prakash
Center Of Excellence In Geotechnical Earthquake Engineering And Soil Dynamics At Iit Roorkee, Shamsher Prakash
Forum for Promotion of Soil Dynamics in India
No abstract provided.
Honor Stalwarts, Shamsher Prakash
Honor Stalwarts, Shamsher Prakash
Forum for Promotion of Soil Dynamics in India
No abstract provided.
Soil Dynamics Course In Curriculum, Deepankar Choudhury
Soil Dynamics Course In Curriculum, Deepankar Choudhury
Forum for Promotion of Soil Dynamics in India
No abstract provided.
A Study Of Mobile Learning For Higher Education Students In Guangzhou, Chun Hung, Hugo Wong
A Study Of Mobile Learning For Higher Education Students In Guangzhou, Chun Hung, Hugo Wong
Practical Social and Industrial Research Symposium
No abstract provided.
Assisted Technology For Daily Living, Raymond K.Y. Tong
Assisted Technology For Daily Living, Raymond K.Y. Tong
Practical Social and Industrial Research Symposium
Prof Tong will introduce two major assisted technologies he recently developed to assist elderly people’s daily living and promote healthy ageing : i) the telecare system for monitoring the safety of single elderly at home; and ii) Kinect system for elderly to carry out home-based exercise.
On Translating Technology Research Into Industrial Applications, Stephen T.C. Wong
On Translating Technology Research Into Industrial Applications, Stephen T.C. Wong
Practical Social and Industrial Research Symposium
Using personal cases he previously experienced, Prof Wong will share with colleagues the influence of environments and market forces that drive the applied technology research into practice. The speech will be delivered in an informal, interactive format, rather than didactic.
Mechatronics In Electrical Efficiency And Environmental Impact, Sherif Hyseni
Mechatronics In Electrical Efficiency And Environmental Impact, Sherif Hyseni
UBT International Conference
This paper focuses on the mechatronic technology development, and its influent on electrical efficiency with a direct result in cost and environment. Considering the well-known European Union standard “20-20-20” and the possibility and responsibility of Kosovo in this field, the role of energy efficiency has great impact for future directions. This paper refers to a new technology solution for heating that is available on the local market, called “DAIKIN” by analyzing the functionality of this device and its promise to save up to 40% of the heating costs. Implementation of “DAIKIN” technology in state institutions in Prishtina, and also the …
The History Of Space Debris, Loretta Hall
The History Of Space Debris, Loretta Hall
Space Traffic Management Conference
This paper examines what space debris consists of and where it came from. In 1958, astronomer Clyde Tombaugh published the results of his research into the existence of natural debris near the Earth, concluding that no such debris existed. During the ensuing fifty-five years, man-made debris has been accumulating to the point that it threatens launches, active satellites, and the International Space Station. NASA reported that as of 2013, more than 21,000 pieces the size of a softball or larger were being tracked, as were about 500,000 pieces at least the size of a marble and “many millions” of pieces …
An Integrated Approach To Orbital Debris Research And Management, Marshall H. Kaplan
An Integrated Approach To Orbital Debris Research And Management, Marshall H. Kaplan
Space Traffic Management Conference
A viable space traffic management program faces a great barrier caused by the ever-increasing number and variety of orbiting objects ranging in size from a few microns to several meters. Although several international agreements to limit the growth rate of orbital debris are in place, the risk of damage and destruction to active satellites is continually rising. The urgency of this situation was highlighted by the 2007 Chinese ASAT test and the collision of Iridium and Cosmos satellites in 2009. Although many debris removal techniques have been posited none have been implemented. Unless a space debris reduction program is undertaken …
Weather Research Requirements To Improve Space Launch From Cape Canaveral Air Force Station And Nasa Kennedy Space Center, William P. Roeder, Lisa L. Huddleston, William H. Bauman Iii, Kelly B. Doser
Weather Research Requirements To Improve Space Launch From Cape Canaveral Air Force Station And Nasa Kennedy Space Center, William P. Roeder, Lisa L. Huddleston, William H. Bauman Iii, Kelly B. Doser
Space Traffic Management Conference
Weather has a large affect on operations at Cape Canaveral Air Force Station (CCAFS) and NASA Kennedy Space Center (KSC). Weather is the leading source of scrubs and delays to space launch from CCAFS/KSC. Weather has an even larger impact on ground processing as space launch vehicles and payloads are prepared in the months before space launch. Many of those operations are very sensitive to weather. In addition, the weather in Florida is notoriously difficult to predict, especially during the summer when rapid deep convection can occur in minutes. Finally, the weather can be extremely subtle in this area during …
Calculation For Moment Capacity Of Beam-To-Upright Connections Of Steel Storage Pallet Racks, Tuo Wang, Xianzhong Zhao, Yiyi Chen
Calculation For Moment Capacity Of Beam-To-Upright Connections Of Steel Storage Pallet Racks, Tuo Wang, Xianzhong Zhao, Yiyi Chen
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Steel storage pallet rack structures are three-dimensional framed structures, which are widely used to store different kinds of goods. For the easy accessibility to stored products, pallet racks are not usually braced in the down-aisle direction. The down-aisle stability is mostly provided by the characteristics of beam-to-upright connections, and the characteristics of upright base connections. In this paper, calculation for moment capacity of beam-to-upright connections is carried out. A mechanical model is presented firstly. Based on the model, moment capacity is related to the failure capacity, directly determined by the failure mode, of the topmost tab of the beam-end-connector and …
Influence Of Diagonal Bracing Restraint On Cold-Formed Steel Perforated Columns Under Axial Compression, Chong Ren, Xianzhong Zhao
Influence Of Diagonal Bracing Restraint On Cold-Formed Steel Perforated Columns Under Axial Compression, Chong Ren, Xianzhong Zhao
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper presents a numerical investigation on the influence of diagonal bracing restraint on cold-formed steel perforated columns subjected to axial compression. Finite element method (FEM) is employed to analyse the structural behaviour of perforated columns. The results obtained from the present study highlight the influence of diagonal bracing restraint on post-buckling of columns, and the distortional-flexural mode interaction is also discussed. Furthermore, the accuracy of the present model is validated by comparing the results against the available experimental data.
Numerical Simulation On Dynamic Behavior Of A Cold-Formed Steel Framing Building Test Model, Yuanqi Li, Rongkui Ma, Zuyan Shen
Numerical Simulation On Dynamic Behavior Of A Cold-Formed Steel Framing Building Test Model, Yuanqi Li, Rongkui Ma, Zuyan Shen
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
A nonlinear dynamic numerical simulation on seismic behavior of a two-story cold-formed steel framing building full-scale shaking table test model was carried out by the way of from components to integral structure. Firstly, refined numerical model of shear wall was established, and restoring force models of screw connections between the framing and sheathings were integrated into the numerical model of shear wall. The refined numerical model of shear wall was verified by tests. Secondly, based on refined numerical model of shear wall and modified exponential “Foschi” skeleton curve, uniform restoring force skeleton curves of two typical shear walls of the …
Design Method Of Bending Load-Carrying Capacity For Sandwich Panels With Different Metal Panel On Both Sides, Yanli Guo, Xingyou Yao, Kai Liu
Design Method Of Bending Load-Carrying Capacity For Sandwich Panels With Different Metal Panel On Both Sides, Yanli Guo, Xingyou Yao, Kai Liu
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
The sandwich panels, with plain and shallow grain pressed metal plate as the face sheets, and glass wools, rigid polyurethane foam, and rock wools as core materials, have excellent heat insulation and mechanical behavior, and been used as curtain walls for tall buildings in recent years in China. Since wind load and temperature action are the main actions for curtain walls, the sandwich panels are flexural members. In this paper, the design method and design formula of flexural load-carrying capacity and flexural deflection of a kind of sandwich plates with different metal panel on both sides are discussed and proposed. …
Study On The Flexural Capacity Of Cold-Formed Steel Joists-Osb Composite Floors, X. H. Zhou, Y. Shi, R. C. Wang, Y. J. Liu
Study On The Flexural Capacity Of Cold-Formed Steel Joists-Osb Composite Floors, X. H. Zhou, Y. Shi, R. C. Wang, Y. J. Liu
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Two full scale specimens were tested to study the flexural capacity of cold-formed steel joists and OSB (Oriented strand board) composite floors. Test results indicated the composite floors had high bearing capacity and small deformation, and the screw spacing significantly affected the load-carrying capacity. The main failure modes were flexural and torsional buckling of floor joist, and the interactive buckling of compression flange, web and crimp. The wave length of bucking equalled to the adjacent screw spacing. Then the specimens were analyzed by commercial software ANSYS and the nonlinear FEM calculation results agreed well with the test results. Furthermore, detailed …
Finite Element Modeling Of New Composite Floors Having Cold-Formed Steel And Concrete Slab, Yazdan Majdi, Cheng-Tzu Thomas Hsu, Mehdi Zarei
Finite Element Modeling Of New Composite Floors Having Cold-Formed Steel And Concrete Slab, Yazdan Majdi, Cheng-Tzu Thomas Hsu, Mehdi Zarei
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
In this research, the structural behavior of a new type of U.S. patented composite floor system is explored through finite element modeling. The new composite floor incorporates cold-formed (light-gauge) steel profiles as the joist on bottom, a corrugated steel deck as the formwork for concrete, a hat channel (furring channel) as the continuous shear connector and finally a concrete slab on top. All steel parts in the system are cold-formed and connected together by self-drilling fasteners. In this study, a comprehensive three-dimensional finite element modeling is performed for the composite floor system. A local bond-slip model is applied to simulate …
Innovative Cold-Formed Steel Framed Shear Wall Sheathed With Corrugated Steel Sheets: Experiments And Dynamic Analysis, Cheng Yu, Guowang Yu, Jie Wang
Innovative Cold-Formed Steel Framed Shear Wall Sheathed With Corrugated Steel Sheets: Experiments And Dynamic Analysis, Cheng Yu, Guowang Yu, Jie Wang
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Cold-formed steel framed shear wall sheathed with corrugated steel sheets is a promising shear wall system for low- and mid-rise constructions in high wind and seismic zones due to its advantages of non-combustibility, high shear strength, and high stiffness. However recent research projects showed that the corrugated steel sheathing demonstrated low ductility. This paper presents an experimental study aimed at improving the ductility of cold-formed steel shear walls sheathed with corrugated steel sheathing. A method of using opening in the sheathing is employed to improve the shear wall’s ductility meanwhile controlling the damage locations and failure mechanism. A total of …
Strain And Stress Distributions In Composite Deck Slabs: A Numerical Study, Vitaliy V. Degtyarev
Strain And Stress Distributions In Composite Deck Slabs: A Numerical Study, Vitaliy V. Degtyarev
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper describes results of a study on strain and stress distributions in compact and slender composite deck slabs using nonlinear three-dimensional finite element models. The slabs were modeled as flexural members made of steel deck units and structural concrete fillings interconnected at the interface with nonlinear springs representing bond between two materials. The models are capable of accounting for partial interaction between the deck and the concrete, discrete concrete cracking in the slab tension zone, and nonlinear behavior of the materials and the interface. They were validated against published test data and have proved to be effective in predicting …
Bond-Slip Characteristics Between Cold-Formed Metal And Concrete, Yazdan Majdi, Cheng-Tzu Thomas Hsu, Sun Punurai
Bond-Slip Characteristics Between Cold-Formed Metal And Concrete, Yazdan Majdi, Cheng-Tzu Thomas Hsu, Sun Punurai
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Composite action in systems consisting of steel and concrete depends on an effective shear-transfer mechanism between the two materials. Such mechanism for smooth steel surfaces inside concrete will be limited to the bond-slip behavior at the steel/concrete interfaces. This research investigates the bond-slip behavior of galvanized cold-formed (light gauge) steel profiles embedded in concrete. A new innovative pull-out test is presented and global bond-slip curves for different values of concrete strength are obtained from such tests. Next, through an innovative procedure, mathematical equations and a few points from the experimental global bond-slip curves are used to develop a bi-linear local …
Evaluation Of The Seismic Performance Of Light Gauge Steel Walls Braced With Flat Straps, Iuorio Ornella, Macillo Vincenzo, Terracciano Maria Teresa, Pali Tatiana, Fiorino Luigi, Landolfo Raffaele
Evaluation Of The Seismic Performance Of Light Gauge Steel Walls Braced With Flat Straps, Iuorio Ornella, Macillo Vincenzo, Terracciano Maria Teresa, Pali Tatiana, Fiorino Luigi, Landolfo Raffaele
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
The development of light weight steel structures in seismic area as Italy requires the upgrading of National Codes. To this end, in the last years a theoretical and experimental study was carried out at the University of Naples within the research project RELUIS-DPC 2010-2013. The study focused on "all steel design" solutions and investigated the seismic behaviour of strap braced stud shear walls. Three wall configurations were defined according to both elastic and dissipative design criteria for three different seismic scenarios. The lateral in-plane behavior of these systems were evaluated by 12 tests performed on full-scale CFS strap-braced stud wall …
Effect Of Stressed-Skin Action On The Behaviour Of Cold-Formed Steel Portal Frames, A. M. Wrzesien, James B. P. Lim, R. M. Lawson
Effect Of Stressed-Skin Action On The Behaviour Of Cold-Formed Steel Portal Frames, A. M. Wrzesien, James B. P. Lim, R. M. Lawson
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper describes six full-scale laboratory tests conducted on cold-formed steel portal frames buildings in order to investigate the effects of joint flexibility and stressed-skin diaphragm action. The frames used for the laboratory tests were of span of 6 m, height of 3 m and pitch of 10⁰; the frame spacing was 3 m. The laboratory test setup represented buildings of length of 9 m, having two gable frames and two internal frames. Tests were conducted on frames having two joint sizes, both with and without roof cladding. It was shown that as a result of stressed-skin diaphragm action, under …
Effect Of Stressed-Skin Action On Optimal Design Of A Cold-Formed Steel Portal Framing System, Duoc T. Phan, Andrzej M. Wrzesien, James B. P. Lim, Iman Hajirasouliha
Effect Of Stressed-Skin Action On Optimal Design Of A Cold-Formed Steel Portal Framing System, Duoc T. Phan, Andrzej M. Wrzesien, James B. P. Lim, Iman Hajirasouliha
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Cold-formed steel portal frames can be a viable alternative to conventional hot-rolled steel portal frames. They are commonly used for low-rise commercial, light industrial and agricultural buildings. In this paper, the effect of semi-rigid joints and stressed-skin action are taken into account in the optimal design of cold-formed steel portal frames. A frame idealization is presented, the results of which are verified against full-scale. A real-coded niching genetic algorithm (RC-NGA) is then applied to search for the minimum cost for a building of span of 6 m, height-to-eaves of 3 m and length of 9 m, with a frame spacing …
In-Plane Behavior Of Cold-Formed Steel-Framed Shear Wall Panels Sheathed With Fibre Cement Board, Rojit Shahi, Nelson Lam, Emad Gad, Ismail Saifullah, John Wilson, Ken Watson
In-Plane Behavior Of Cold-Formed Steel-Framed Shear Wall Panels Sheathed With Fibre Cement Board, Rojit Shahi, Nelson Lam, Emad Gad, Ismail Saifullah, John Wilson, Ken Watson
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Shear wall panels are commonly used as lateral load resisting elements to provide stability of the cold-formed steel-framed houses in Australia against wind and earthquake actions. The effectiveness of their lateral resistance behavior is obtained usually by experimental testing although it can also be done by analytical modeling. This paper presents racking test results of steelframed wall panels with different aspect ratios sheathed with fibre cement board subjected to monotonic and cyclic loading protocol. Performance parameters of the wall panels are obtained from the experimentally observed load-deflection curves using various existing methods and evaluation method is proposed. The evaluation method …
Simplified Seismic Design For Mid-Rise Buildings With Vertical Combination Of Cold-Formed Steel And Concrete Framing, X. L. Yuan, L. Xu
Simplified Seismic Design For Mid-Rise Buildings With Vertical Combination Of Cold-Formed Steel And Concrete Framing, X. L. Yuan, L. Xu
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Presented in this paper is a practical approach for the seismic design of mid-rise buildings with vertical combination of cold-formed steel and concrete framing. In current design practice the presence of vertical irregularities on both mass and stiffness inherited in such building structures creates a challenge for the seismic design. Currently, a two stage lateral force procedure prescribed in ASCE 7 is prescribed for evaluating the seismic load if the lateral stiffness of the lower structure of the building is considerably more rigid than the upper one. In the proposed approach the requirement associated with the two stage analysis procedure …
Lateral Loading Response Of Cfs Framed Shear Wall With Cement Board Panels, N. Baldassino, M. Accorti, R. Zandonini, F. Scavazza, C. A. Rogers
Lateral Loading Response Of Cfs Framed Shear Wall With Cement Board Panels, N. Baldassino, M. Accorti, R. Zandonini, F. Scavazza, C. A. Rogers
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Shear wall panels are commonly used as lateral load resisting elements to provide stability of the cold-formed steel-framed houses in Australia against wind and earthquake actions. The effectiveness of their lateral resistance behavior is obtained usually by experimental testing although it can also be done by analytical modeling. This paper presents racking test results of steel-framed wall panels with different aspect ratios sheathed with fibre cement board subjected to monotonic and cyclic loading protocol. Performance parameters of the wall panels are obtained from the experimentally observed load-deflection curves using various existing methods and evaluation method is proposed. The evaluation method …
Structural Strength Of Lapped Cold-Formed Steel Z-Shaped Purlin Connections With Vertical Slotted Holes, J. Liu, L. Xu, S. Fox
Structural Strength Of Lapped Cold-Formed Steel Z-Shaped Purlin Connections With Vertical Slotted Holes, J. Liu, L. Xu, S. Fox
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Lapped joints of cold-formed steel (CFS) Z-shaped purlins are extensively used in metal building roof systems. The research that has been carried out so far for these lapped connections is primarily focused on connections with round holes. However, the lapped connections with vertical slotted holes are extensively used in current construction practice to simplify the erection of continuous Z-shaped roof purlins. There are no design guidelines or recommendations available for CFS Z-purlin lapped connections with vertical slotted holes.
Presented in this paper are the results of an experimental study on the structural strength behaviour of lapped CFS Z-shaped purlin connections …
Fastener-Based Computational Models With Application To Cold-Formed Steel Shear Walls, G. Bian, S. G. Buonopane, Hung Huy Ngo, Benjamin W. Schafer
Fastener-Based Computational Models With Application To Cold-Formed Steel Shear Walls, G. Bian, S. G. Buonopane, Hung Huy Ngo, Benjamin W. Schafer
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
The objective of this paper is to validate a tool that design engineers could employ to develop mechanics-based predictions of the lateral response of wood-sheathed cold-formed steel (CFS) framed shear walls applicable in a wide variety of situations. Wood framed shear walls enjoy a variety of tools, most notably SAPWood and its predecessor CASHEW, that provide a means to predict the complete hysteretic behavior of a shear wall based on the nail fastener schedule and board selection. The existence of these tools helps engineers in unique design situations, encourages innovation in shear wall design particularly for Type I shear walls, …
Acoustic Performance Of Different Cold-Formed Studs In Double-Leaf Walls By Finite Element Analysis And Experiment, V. B. Nguyen, T. Morgan, M. A. English, M. A. Castellucci
Acoustic Performance Of Different Cold-Formed Studs In Double-Leaf Walls By Finite Element Analysis And Experiment, V. B. Nguyen, T. Morgan, M. A. English, M. A. Castellucci
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Cold-formed steel studs are often used in lightweight partition walls to provide structural stability but in the same time they change the acoustic performance of the whole system. The overall design of such lightweight structures for acoustic sound insulation becomes very complicated as the sound passing through stud needs to be quantified. One of the greatest challenges is to characterise the stud’s geometric effects on the sound transmission of the partition walls. This paper presents a Finite Element modelling approach and results into the acoustic performance of cold-formed studs in double-leaf walls which are placed in between a source room …