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Full-Text Articles in Architecture
Collapse Behavior Of Pino Suarez Building During 1985 Mexico City Earthquake, Jeng Fuh Ger, Franklin Y. Cheng, Le Wu Lu
Collapse Behavior Of Pino Suarez Building During 1985 Mexico City Earthquake, Jeng Fuh Ger, Franklin Y. Cheng, Le Wu Lu
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
This paper presents the investigation of the collapse behavior of a 22-story steel building during the September 19, 1985, Mexico City earthquake by studying hysteretic behavior, ductility factors of individual structural components, and overall instability of the building. Extensive inelastic analyses have been performed for the building by using the multicomponent seismic input of actual Mexico City earthquake records. It was found that the structural response exceeds the original design ductility of this building, and most girders in the building have severe inelastic deformation. Due to the load redistribution that results from ductile girder failure, local buckling occurred in many …
Phenotypic Characterization Of Copper-Resistant Mutants Of Methylosinus Trichosporium Ob3b, M. (Mark) W. Fitch, D. W. Graham, R. G. Arnold, S. K. Agarwal, P. Phelps, G. E. Speitel, G. Georgiou
Phenotypic Characterization Of Copper-Resistant Mutants Of Methylosinus Trichosporium Ob3b, M. (Mark) W. Fitch, D. W. Graham, R. G. Arnold, S. K. Agarwal, P. Phelps, G. E. Speitel, G. Georgiou
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Cultures of Methylosinus Trichosporium OB3b Grown in the Presence of Very Low Concentrations of Copper Synthesize a Soluble Methane Monooxygenase (SMMO) that Efficiently Catalyzes the Oxidation of Trichloroethylene and Other Organic Pollutants. Recently, We Isolated Five M. Trichosporium OB3b Mutants that Express SMMO Activity When Grown in the Presence of Elevated Copper Concentrations (P. A. Phelps, S. K. Agarwal, G. E. Speitel, Jr., and G. Georgiou, Appl. Environ. Microbiol. 58:3701-3708, 1992). Here We Show that, in Contrast to the Results for the Wild-Type Cells, the Addition of Copper to Mutant Cultures Grown on Methane and Nitrate as the Nitrogen Source …
Permeation Of Several Gases Through Elastomers, With Emphasis On The Deuterium/Hydrogen Pair, M. (Mark) W. Fitch, W. J. Koros, R. L. Nolen, J. R. Carnes
Permeation Of Several Gases Through Elastomers, With Emphasis On The Deuterium/Hydrogen Pair, M. (Mark) W. Fitch, W. J. Koros, R. L. Nolen, J. R. Carnes
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The Diffusion and Permeation Coefficients for He, H2, D2, O2, and N2 in a Variety of Elastomers Were Measured by Simple Manometric Methods. the Elastomers Studied Were Butyl Rubber; Hypalon® 40 and 45; Viton® E60 and GF; Hydrin® 100 and Filled Hydrin® 100; Kraton® G, FG, and KG VTEOS; EPDM; Epoxidized Natural Rubber; and Neoprene. Consistent with Earlier Studies, Elastomers with Higher Glass Transition Temperatures Exhibited Lower Diffusion Coefficients. the Ratio of Diffusion Coefficients of the Hydrogen Isotope Pair Differed from the Purely Molecular‐weight‐based Prediction. Deuterium's Slightly Smaller Size Relative to Hydrogen is Consistent with Observed Deviations from the Molecular‐weight‐based …
Computed Versus Observed Inelastic Seismic Low-Rise Rc Shear Walls, Franklin Y. Cheng, G. E. Mertz, M. S. Sheu, J. F. Ger
Computed Versus Observed Inelastic Seismic Low-Rise Rc Shear Walls, Franklin Y. Cheng, G. E. Mertz, M. S. Sheu, J. F. Ger
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
A technique of calculating inelastic deformation of low-rise shear walls having height-width ratios of 0.5 and 0.75 without boundary elements is presented with consideration of the coupling effect for bending and shear deformations as well as the deformation due to base rotation. An interaction surface of moment, shear, and curvature or moment, shear, and shear strain is developed. The deflections at crack, yield, and ultimate loadings can be calculated separately from bending and shear deformations, which are compared favorably with experimental results. The shear deformation is significant for the low-rise walls studied because the deformation due to bending deformation is …
Postbuckling And Hysteresis Models Of Open-Web Girders, Jeng Fuh Ger, Franklin Y. Cheng
Postbuckling And Hysteresis Models Of Open-Web Girders, Jeng Fuh Ger, Franklin Y. Cheng
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The paper presents analytical studies of hysteretic behavior of open-web girders with angle web members. The partial inelasticity of the member cross section is traced using finite segment formulation with stress-strain control. A member is divided into a number of segments, and, for each segment, the cross section is divided into many small elements, which allows the inelastic deformation of the member to be modeled. Therefore, member stiffness is established for various inelastic deformation stages. The eccentricities and initial imperfections of web members are considered in the analysis. Good agreement between experimental and present analytical results was found for individual …
Postbreakage Behavior Of Heat Strengthened Laminated Glass Under Wind Effects, Chris P. Pantelides, Amy D. Horst, Joseph E. Minor
Postbreakage Behavior Of Heat Strengthened Laminated Glass Under Wind Effects, Chris P. Pantelides, Amy D. Horst, Joseph E. Minor
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Results of a full-scale experimental investigation into the post breakage behavior of heat-strengthened laminated glass subjected to windstorm effects are presented. Two different interlayer constructions and two different glazing configurations are examined. The two interlayer constructions are a PVB polymer and a PVB/PET/PBV composite polymer. The two glazing configurations are a conventional dry glazed system and an unconventional system with a silicone anchor bead. Two test criteria are established that relate to effects of a severe windstorm. The first criterion addresses impact with windborne debris; the second defines a wind-load spectrum that represents a severe windstorm of a 4-hr duration. …
Mineralization And Uptake Of Triazine Pesticide In Soil-Plant Systems, Dhileepan R. Nair, Joel G. (Gerard) Burken, Louis A. Licht, Jerald L. Schnoor
Mineralization And Uptake Of Triazine Pesticide In Soil-Plant Systems, Dhileepan R. Nair, Joel G. (Gerard) Burken, Louis A. Licht, Jerald L. Schnoor
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Deep-Rooted Trees Planted as a Buffer Zone Can Intercept Runoff and Eroded Sediments, Thus Reducing Non-Point-Source Pollution Due to Agricultural Chemicals. in This Study, Populus Sp. Were Grown in Bioreactors with an Agricultural Soil (Silt-Loam) and in a Silica-Sand Media; Both Were Spiked with 14C Uniformly Ring-Labeled Atrazine. the Plants Took Up over 11% of the 14C Labeled Atrazine Applied to the Silt-Loam Soil and over 91% of that Applied to the Silica Sand Media, with the Majority of the 14C Accumulating as Nonphytotoxic Metabolites in the Leaves. Research Suggests that, in Addition to Nutrient Uptake, Poplar …
Behavior Of Arc Spot Weld Connections In Tension, Roger A. Laboube, Wei-Wen Yu
Behavior Of Arc Spot Weld Connections In Tension, Roger A. Laboube, Wei-Wen Yu
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Arc spot welds, commonly called puddle welds, are widely used for connecting cold-formed steel roof decks to their supporting members. These support members are typically hot-rolled steel beams or girders, or the top chord of open-web steel joists. A comprehensive experimental study of the tension strength of arc spot weld connections used to affix a cold-formed steel roof deck to its support member was conducted. The study investigated the key parameters that influence the connection strength: Steel thickness, tensile strength, and ductility; type of weld process, automatic or manual; cross section of the roof deck; loading condition, symmetrical or eccentric …
Simplified Strength Prediction For Cold-Formed C- And Z-Shapes, Roger A. Laboube
Simplified Strength Prediction For Cold-Formed C- And Z-Shapes, Roger A. Laboube
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Although cold-formed steel C- and Z-shaped members possess a very favorable strength-to-weight ratio, are easily fabricated and erected, and offer a cost-effective structural design solution, they can be highly susceptible to local buckling. To adequately address the impact of the local buckling limit state, a complex, time-consuming design office effort may be required. Therefore, to facilitate the design of such shapes, a study was conducted that focused on developing relatively simple, easy-to-apply design guidelines. The design guidelines address the behavior of cold-formed steel C- and Z-shaped members when used as either a flexural member or a compression member. Both edge-stiffened …
Structural Behavior Of Architectural Laminated Glass, R. A. Belir, Joseph E. Minor, H. S. Norville
Structural Behavior Of Architectural Laminated Glass, R. A. Belir, Joseph E. Minor, H. S. Norville
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Experimental and theoretical investigations conducted over a 20-year time period by several investigators provide sufficient data and information to define, for practical engineering purposes, the behavior of architectural laminated glass under lateral pressures. Investigations included definitions of material properties, theoretical stress analyses, experimental stress analyses, and destructive tests involving monolithic, laminated, and "layered" glass plates of several geometries. The preponderance of data and information indicate that: (1) Architectural laminated glass behaves in a manner similar to monolithic glass of the same nominal thickness under short-term lateral pressures (representative of wind loads) at and below room temperature; (2) the temperature at …