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Articles 1 - 30 of 119
Full-Text Articles in Structural Engineering
Reliability-Based Optimization Of Fiber-Reinforced Polymer Composite Bridge Deck Panels, Michel D. Thompson, Christopher D. Eamon, Masoud Rais-Rohani
Reliability-Based Optimization Of Fiber-Reinforced Polymer Composite Bridge Deck Panels, Michel D. Thompson, Christopher D. Eamon, Masoud Rais-Rohani
Civil and Environmental Engineering Faculty Research Publications
A reliability-based optimization (RBO) procedure is developed and applied to minimize the weight of eight fiber-reinforced polymer composite bridge deck panel configurations. The method utilizes interlinked finite element, optimization, and reliability analysis procedures to solve the weight minimization problem with a deterministic strength constraint and two probabilistic deflection constraints. Panels are composed of an upper face plate, lower face plate, and a grid of interior stiffeners. Different panel depths and stiffener layouts are considered. Sensitivity analyses are conducted to identify significant design and random variables. Optimization design variables are panel component ply thicknesses while random variables include load and material …
Biogasoline Production From Palm Oil Via Catalytic Hydrocracking Over Gamma-Alumina Catalyst, Anondho Wijanarko, Dadi Ahmad Mawardi, Mohammad Nasikin
Biogasoline Production From Palm Oil Via Catalytic Hydrocracking Over Gamma-Alumina Catalyst, Anondho Wijanarko, Dadi Ahmad Mawardi, Mohammad Nasikin
Makara Journal of Technology
Biogasoline Production from Palm Oil Via Catalytic Hydrocracking over Gamma-Alumina Catalyst. Bio gasoline conversion from palm oil is an alternative energy resources method which can be substituted fossil fuel base energy utilization. Previous research resulted that palm oil can be converted into hydrocarbon by catalytic cracking reaction with γ-alumina catalyst. In this research, catalytic cracking reaction of palm oil by γ-alumina catalyst is done in a stirrer batch reactor with the oil/catalyst weight ratio variation of 100:1, 75:1, and 50:1; at suhue variation of 260 to 340oC and reaction time variation of 1 to 2 hour. Post cracking reaction, bio …
A Study On Parallel Computation Tools On Networked Pcs, Heru Suhartanto
A Study On Parallel Computation Tools On Networked Pcs, Heru Suhartanto
Makara Journal of Technology
A Study on Parallel Computation Tools on Networked PCs. Many models for natural phenomena, engineering applications and industries need powerfull computing resources to solve their problems. High Performance Computing resources were introduced by many researchers. This comes in the form of Supercomputers and with operating systems and tools for development such as parallel compiler and its library. However, these resources are expensive for the investation and maintenance, hence people need some alternatives. Many people then introduced parallel distributed computing by using available computing resource such as PCs. Each of these PCs is treated as a processors, hence the cluster of …
Crude Oil Sludge Degradation In Microcosmic Scale: Simple Simulation As Preliminary Study On Land Treatment Bioremediation., Astri Nugroho
Crude Oil Sludge Degradation In Microcosmic Scale: Simple Simulation As Preliminary Study On Land Treatment Bioremediation., Astri Nugroho
Makara Journal of Technology
Crude Oil Sludge Degradation in Microcosmic Scale: Simple Simulation as Preliminary Study on Land Treatment Bioremediation. A study in microcosmic condition has been carried out to evaluate the bacterial hydrocarbonoclastic capability in increasing the oil sludge degradation being mixed with NPK fertilizer as nitrogen resources. Aerobic test was carried out by putting erlenmeyers in a shaker incubator, 120 rpm shaking speed, at 50°C temperature. While 150 days in microcosmic one observation showed that the consortium has the potential to grow up to 50% (v/v) sludge oil load. Maximum growth and maximum growth rate of the consortium occurred in the III …
Determination Of Operation Condition And Product Dimension Accuracy Optimization Of Filament Deposition Modelling On Layer Manufacturing Application, Slamet A. Widyanto, Alva Edy Tontowi, Jamasri Jamasri, Heru Santoso Budi Rochardjo
Determination Of Operation Condition And Product Dimension Accuracy Optimization Of Filament Deposition Modelling On Layer Manufacturing Application, Slamet A. Widyanto, Alva Edy Tontowi, Jamasri Jamasri, Heru Santoso Budi Rochardjo
Makara Journal of Technology
Layer manufacturing process has proven as a process that can produce a high complexity mechanical part. Now, Improvement of LM methods continuously conduct that is aimed to increase precessions and efficiency of these processes. Pressure filament deposition modelling is a form of layer manufacturing process that is designed to produce a plastic part with controlling its semisolid phase. In this research, the equipment of filament depositor is designed and tested to make the product filament deposition. With operation condition observation, the optimal temperature and pressure of deposition process was determined. These experiments used PVC as crystalline material and polypropylene as …
Magnetic Field Effects On Caco3 Precipitation Process In Hard Water, Nelson Saksono, Setijo Bismo, Elsa Krisanti, Azwar Manaf, Roekmijati Widaningrum
Magnetic Field Effects On Caco3 Precipitation Process In Hard Water, Nelson Saksono, Setijo Bismo, Elsa Krisanti, Azwar Manaf, Roekmijati Widaningrum
Makara Journal of Technology
Magnetic Field Effects on CaCO3 Precipitation Process in Hard Water. Magnetic treatment is applied as physical water treatment for scale prevention especially CaCO3, from hard water in piping equipment by reducing its hardness. Na2CO3 and CaCl2 solution sample was used in to investigate the magnetic fields influence on the formation of particle of CaCO3. By changing the strength of magnetic fields, exposure time and concentration of samples solution, this study presents quantitative results of total scale deposit, total precipitated CaCO3 and morphology of the deposit. This research was run by comparing magnetically and non-magnetically treated samples. The results showed an …
Stress Corrosion Cracking Behavior Of Stainless Steel 304 In The Sulfuric Acid Environment Due To Prestrain, Mohammad Badaruddin, Ahmad Suudi, Arinal Hamni
Stress Corrosion Cracking Behavior Of Stainless Steel 304 In The Sulfuric Acid Environment Due To Prestrain, Mohammad Badaruddin, Ahmad Suudi, Arinal Hamni
Makara Journal of Technology
Stress Corrosion Cracking Behavior of Stainless Steel 304 in the Sulfuric Acid Environment Due to Prestrain. The aim of research is to investigate the effect of prestrain on the stress corossion cracking behavior of AISI 304 stainless steel in the sulfuric acid of 10% concentration under the static cantilever loading according to ASTM E-1681 standart. The specimen of 304 Stainless steel was strain up over the yield strength until reaching the uniform strain of 5% and 10% using servopulser UTM 9506 under the displacement control of 0,3 mm/sec. The results of test show that the prestrain of 5% specimen is …
Segmental Sinusoidal Model For Speech Signal Coding, Florentinus Budi Setiawan, Soegijardjo Soegijoko, Sugihartono Sugihartono, Suhartono Tjondronegoro
Segmental Sinusoidal Model For Speech Signal Coding, Florentinus Budi Setiawan, Soegijardjo Soegijoko, Sugihartono Sugihartono, Suhartono Tjondronegoro
Makara Journal of Technology
Segmental Sinusoidal Model for Speech Signal Coding. Periodic signal can be decomposed by sinusoidal component with Fourier series. With this characteristic, it can be modeled referring by sinusoidal form. By the sinusoidal model, signal can be quantized in order to encode the speech signal at the lower rate. The recent sinusoidal method is implemented in speech coding. By using this method, a block of the speech signal with 20 ms to 30 ms width is coded based on Fourier series coefficients. The new method proposed is quantization and reconstruction of speech signal by the segmental sinusoidal model. A segment is …
Testing And Evaluation Of Light Gauge Steel Frame / 9.5 Mm Csp Wood Panel Shear Walls, David Rokas
Testing And Evaluation Of Light Gauge Steel Frame / 9.5 Mm Csp Wood Panel Shear Walls, David Rokas
CCFSS Library (1939 - present)
The use of light gauge steel framing elements sheathed with wood plywood or oriented strand board are becoming more common in the construction of structural shear walls for low-rise platform frame structural systems in Canada. Canadian standards and codes do not currently outline design methods for this type of wall system. Therefore, research at McGill University is underway to help develop design parameters for seismic and wind loading that can be used in conjunction with the 2005 National Building Code of Canada for this type of shear wall system. The research is based on the monotonic and reversed cyclic testing …
Steel Deck Institute Diaphragm Design Manual: Third Edition, Larry D. Luttrell
Steel Deck Institute Diaphragm Design Manual: Third Edition, Larry D. Luttrell
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Shear Rigidity Of Sheathed Walls With Pneumatically Driven Pin Connections, Wimal Suaris, Stuart Werner Baur
Shear Rigidity Of Sheathed Walls With Pneumatically Driven Pin Connections, Wimal Suaris, Stuart Werner Baur
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Strength And Stiffness Of Conventional Bridging Systems For Cold-Formed Cee Studs, Perry S. Green, Thomas Sputo, Viswanath Urala
Strength And Stiffness Of Conventional Bridging Systems For Cold-Formed Cee Studs, Perry S. Green, Thomas Sputo, Viswanath Urala
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
The 2002 Aisi Cold-Formed Steel Design Manual, Richard C. Kaehler, Helen Chen
The 2002 Aisi Cold-Formed Steel Design Manual, Richard C. Kaehler, Helen Chen
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Impact Of Holes On The Elastic Buckling Of Cold-Formed Steel Columns With Application To The Direct Strength Method, Christopher D. Moen, Benjamin W. Schafer
Impact Of Holes On The Elastic Buckling Of Cold-Formed Steel Columns With Application To The Direct Strength Method, Christopher D. Moen, Benjamin W. Schafer
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Distortional Buckling Tests On Cold-Formed Steel Beams, Cheng Yu, Benjamin W. Schafer
Distortional Buckling Tests On Cold-Formed Steel Beams, Cheng Yu, Benjamin W. Schafer
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Laterally braced cold-formed steel beams generally fail due to local or distortional buckling. When the compression flange is not restrained by attachment to sheathing or paneling, such as in negative bending of continuous members (joist, purlins, etc.), members are prone to distortional failures. However, distortional buckling remains a largely unaddressed problem in the main body of the North American Specification (NAS 2001). Only a limited amount of experimental data on unrestricted distortional buckling in bending is available, therefore a new series of distortional buckling tests was completed. The test details are selected specifically to insure that distortional buckling is free …
Local-Plate And Distortional Post-Buckling Behavior Of Cold-Formed Steel Lipped Channel Columns With Intermediate Stiffeners, Nuno Silvestre, Dinar Camotim
Local-Plate And Distortional Post-Buckling Behavior Of Cold-Formed Steel Lipped Channel Columns With Intermediate Stiffeners, Nuno Silvestre, Dinar Camotim
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper reports the results of an investigation concerning the local-plate and distortional post-buckling behavior of cold-formed steel lipped channel columns with web and flange intermediate stiffeners. They have all been obtained through geometrically non-linear analyses based on a recently developed and implemented Generalized Beam Theory (GBT) formulation that incorporates (i) conventional (shear undeformable), (ii) shear (non-linear warping) and (iii) transverse extension deformation modes. These results, some of which are compared with values yielded by shell finite element analyses performed in the code ABAQUS (mostly for validation purposes), provide the evolution, along a given local-plate or distortional post-buckling equilibrium path, …
Stress Gradient Effect On The Buckling Of Thin Plates, Cheng Yu, Benjamin W. Schafer
Stress Gradient Effect On The Buckling Of Thin Plates, Cheng Yu, Benjamin W. Schafer
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
This paper presents an analytical method to calculate the buckling stress of a rectangular thin plate under nonuniform applied axial stresses. Two cases are considered, buckling of a plate simply supported on all four sides and buckling of a plate simply supported on three sides with one unloaded edge free and the opposite unloaded edge rotationally restrained. These two cases illustrate the influence of stress (moment) gradient on stiffened and unstiffened elements, respectively. The axial stress gradient is equilibrated by shear forces along the supported edges. A Rayleigh-Ritz solution with an assumed deflection function as a combination of a polynomial …
Cold-Formed Steel Frame Shear Wall Applications With Structural Adhesives, Geynaud Serrette, Ioi Lam, Henry Qi, Hugo Hernandez
Cold-Formed Steel Frame Shear Wall Applications With Structural Adhesives, Geynaud Serrette, Ioi Lam, Henry Qi, Hugo Hernandez
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
The Strength Of Stiffened Cfs Floor Joist Assemblies With Offset Loading, S. R. Fox
The Strength Of Stiffened Cfs Floor Joist Assemblies With Offset Loading, S. R. Fox
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Web Crippling Of Sigma-Shaped Metal Studs In A Wall Assembly, E. A. Sumner
Web Crippling Of Sigma-Shaped Metal Studs In A Wall Assembly, E. A. Sumner
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Report On The Development Of A Cold-Formed Steel Design Course At Kansas State University, V. J. Kircher, Sutton F. Stephens
Report On The Development Of A Cold-Formed Steel Design Course At Kansas State University, V. J. Kircher, Sutton F. Stephens
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Software Development For Cold-Formed Steel Elements, Francisco Javier Granados Nino, William Gustavo Reyes Ortiz
Software Development For Cold-Formed Steel Elements, Francisco Javier Granados Nino, William Gustavo Reyes Ortiz
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Cold-Formed Steel Slip-Track Connection, James R. Gerloff, Peter Huttelmaier, Patrick W. Ford
Cold-Formed Steel Slip-Track Connection, James R. Gerloff, Peter Huttelmaier, Patrick W. Ford
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Design Of Distance Profiles In Walls, N. Albrecht, H. Saal, R. Podleschny
Design Of Distance Profiles In Walls, N. Albrecht, H. Saal, R. Podleschny
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Performance Of Deep Leg L-Headers, Reynaud Serrette, Khanh Chau, Dean Peyton, Bud Waters
Performance Of Deep Leg L-Headers, Reynaud Serrette, Khanh Chau, Dean Peyton, Bud Waters
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Aisi Standards For Cold-Formed Steel Framing, Jay W. Larson
Aisi Standards For Cold-Formed Steel Framing, Jay W. Larson
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Vibration Characteristics And Acceptability Of Cold-Formed Steel Joists, Y. Frank Chen
Vibration Characteristics And Acceptability Of Cold-Formed Steel Joists, Y. Frank Chen
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Design Criteria For Seam And Sheeting-To-Framing Connections Of Cold-Formed Steel Shear Panels, Lodovic A. Fulop, Daniel Dubina
Design Criteria For Seam And Sheeting-To-Framing Connections Of Cold-Formed Steel Shear Panels, Lodovic A. Fulop, Daniel Dubina
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Computer Modeling Of Sloped Z-Purlin Supported Roof Systems To Predict Lateral Restraint Force Requirements, Michael W. Seek, Thomas M. Murray
Computer Modeling Of Sloped Z-Purlin Supported Roof Systems To Predict Lateral Restraint Force Requirements, Michael W. Seek, Thomas M. Murray
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
The Structural Behavior Of Connections Of Cold-Formed Steel Portal Frames, Young Bong Kwon, Hyun Suk Chung, Gap Deuk Kim
The Structural Behavior Of Connections Of Cold-Formed Steel Portal Frames, Young Bong Kwon, Hyun Suk Chung, Gap Deuk Kim
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.