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Stress-strain curves of concrete confined by spiral reinforcement
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and boundary conditions. Comparative studies were made and possible sources of discrepancies were traced.
Galambos, T V, Reinhold, T A and Ellingwood, B 'Serviceability limit states: connection slip'/. 5truct. Div. ASCE Vol 108 No 12 (December 1982) pp 2 6 6 8 - 2 6 8 0 The serviceability limit state for Slip bolted steel joints is the slip-resistance. The statistical properties of the parameters which define this resistance are presented and analysed. Based on these properties, and using first-order second-moment probabilistic analysis, limit-states design criteria are developed for friction-grip bolted joints. Garg, V K, Chu, K H and Wiriyachai, A 'Fatigue life of critical members in a railway truss bridge' Earthquake Eng. Struct. Dynamics/. Vol 10 (1982) pp 797--811 The fatigue life of critical members, such as hangers, floor-beams and stringers in a single track, open deck railroad truss bridge, was investigated for various unit freight trains, operating at different speeds. A partial bridge model was used, along with a threecar train, to determine the stress cycles. For determining the fatigue lives of critical members, four fully-loaded trains per day were assumed to pass over the bridge. The impact percentages were also studied. Mahar, L J and O'Neill, M W 'Geotechnical characterization of desiccated c l a y ' / . Geotechnical Eng. ASCE Vol 109 No 1 (January 1982) pp 56-71 Conventional testing procedures produce scatter and bias in indicated properties of soils, such as desiccated clays. This paper describes and compares several conventional and nonconventional methods for characterizing the engineering properties of such soils at a site in Houston, Texas. Properties considered include undrained shear strength, stress-deformation moduli, earth pressure coefficients, and compression indexes. Similarities and differences between soil
v o l u m e 15 n u m b e r 4 j u l y 1 9 8 3
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preconsolidated by desiccation and by stress removal are noted. Easley, J T, Foomani, M and Dodds, R H 'Formulas for wood shear walls' J. $truct. Div. ASCE Vol 108 No 11 Proc Paper 17460 (November 1982) pp 2 4 6 0 - 2 4 7 8 Formulas are presented for the analysis of typical wood-frame shear walls with sheathing attached by nails or other types of discrete fasteners. Formulas are derived for the sheathing fastener forces, for the linear shear stiffness of a wall, and for the nonlinear shear load-strain behaviour of a wall. These formulas are shown to be in agreement with the results of load tests and of finite element, linear, and nonlinear analyses. Details of the load tests and finite element analyses are given. The formulas are relatively simple and should be applicable to the design of wood frame shear walls with plywood or other types of sheathing. Mansouri, T A, Nelson, I D and Thompson, E G 'Dynamic response and liquefaction of earth dams' J. Geotechnical Eng. ASCE Vol 109 No 1 (January 1983) pp 8 9 - 1 0 0 A model for predicting the dynamic response and liquefaction of earth structures was developed. The model was based on Blot's theory for the propagation of elastic waves in a porous medium and an empirical relation p u t forth by Finn, et al for the volumetric strain resulting from an applied shear model was applied to a hypothetical earth dam. The results of the analysis were compared to the observed liquefaction in the San Fernando dam and were shown to be reasonable. Hall, J F 'An FFT angorithm for structural dynamics' Earthquahe Eng. Struct. Dynamics J. Vol 10 (1982) pp 797-811 An FFT (Fast Fourier Transform) algorithm is described which is especially suited for structural dynamics. The routine incorporates several features selected from many variations of the original Cooley and Tukey
algorithm with the goal of making the most efficient use of computer time and storage while maintaining simplicity. Some introductory material to Fourier transform techniques and a description of the original algorithm are also included. In addition, the source listing of the subroutine FFT is reproduced. Ahmad, S H and Shah, S P 'Stress-strain curves of concrete confined by spiral reinforcement' Am. Concrete Inst. J. Proceeding Volume 79 No 6 (NovemberDecember 1982) pp 4 8 4 - 4 9 0 Stress-strain curves of concrete confined with spiral reinforcement were determined. The influence of compressive strength, aggregate type, and the spacing and yield strength of hoop reinforcement was investigated. A model was developed to predict the stress-strain curves of confined concrete based on properties of the hoop reinforcement and constitutive relationship of plain concrete. The analytical model favourably predicted the results of the discussed experiments as well as other investigations. Gross, J L and McGuire, W 'Progressive collapse resistant design' J Struct. Div. ASCE Vol 109 No 1 (January 1983) pp 1 - 1 5 Progressive collapse is a situation in which a localized failure in a structure, caused by an abnormal load, triggers a cascade of failure affecting a major portion of the structure. Several alternative methods to deal with the problem of design for the prevention of progressive collapse are reviewed. A computer analysis program capable of tracing the behaviour of framed structures through collapse is explained. Of particular note is the capability to remove selectively any member in the structure and determine if collapse will result. Several examples using interactive computer graphics techniques in applying the collapse resistant design procedures are presented.
Collated by CoHos Pesquera
253
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and boundary conditions. Comparative studies were made and possible sources of discrepancies were traced.
Galambos, T V, Reinhold, T A and Ellingwood, B 'Serviceability limit states: connection slip'/. 5truct. Div. ASCE Vol 108 No 12 (December 1982) pp 2 6 6 8 - 2 6 8 0 The serviceability limit state for Slip bolted steel joints is the slip-resistance. The statistical properties of the parameters which define this resistance are presented and analysed. Based on these properties, and using first-order second-moment probabilistic analysis, limit-states design criteria are developed for friction-grip bolted joints. Garg, V K, Chu, K H and Wiriyachai, A 'Fatigue life of critical members in a railway truss bridge' Earthquake Eng. Struct. Dynamics/. Vol 10 (1982) pp 797--811 The fatigue life of critical members, such as hangers, floor-beams and stringers in a single track, open deck railroad truss bridge, was investigated for various unit freight trains, operating at different speeds. A partial bridge model was used, along with a threecar train, to determine the stress cycles. For determining the fatigue lives of critical members, four fully-loaded trains per day were assumed to pass over the bridge. The impact percentages were also studied. Mahar, L J and O'Neill, M W 'Geotechnical characterization of desiccated c l a y ' / . Geotechnical Eng. ASCE Vol 109 No 1 (January 1982) pp 56-71 Conventional testing procedures produce scatter and bias in indicated properties of soils, such as desiccated clays. This paper describes and compares several conventional and nonconventional methods for characterizing the engineering properties of such soils at a site in Houston, Texas. Properties considered include undrained shear strength, stress-deformation moduli, earth pressure coefficients, and compression indexes. Similarities and differences between soil
v o l u m e 15 n u m b e r 4 j u l y 1 9 8 3
Ii
preconsolidated by desiccation and by stress removal are noted. Easley, J T, Foomani, M and Dodds, R H 'Formulas for wood shear walls' J. $truct. Div. ASCE Vol 108 No 11 Proc Paper 17460 (November 1982) pp 2 4 6 0 - 2 4 7 8 Formulas are presented for the analysis of typical wood-frame shear walls with sheathing attached by nails or other types of discrete fasteners. Formulas are derived for the sheathing fastener forces, for the linear shear stiffness of a wall, and for the nonlinear shear load-strain behaviour of a wall. These formulas are shown to be in agreement with the results of load tests and of finite element, linear, and nonlinear analyses. Details of the load tests and finite element analyses are given. The formulas are relatively simple and should be applicable to the design of wood frame shear walls with plywood or other types of sheathing. Mansouri, T A, Nelson, I D and Thompson, E G 'Dynamic response and liquefaction of earth dams' J. Geotechnical Eng. ASCE Vol 109 No 1 (January 1983) pp 8 9 - 1 0 0 A model for predicting the dynamic response and liquefaction of earth structures was developed. The model was based on Blot's theory for the propagation of elastic waves in a porous medium and an empirical relation p u t forth by Finn, et al for the volumetric strain resulting from an applied shear model was applied to a hypothetical earth dam. The results of the analysis were compared to the observed liquefaction in the San Fernando dam and were shown to be reasonable. Hall, J F 'An FFT angorithm for structural dynamics' Earthquahe Eng. Struct. Dynamics J. Vol 10 (1982) pp 797-811 An FFT (Fast Fourier Transform) algorithm is described which is especially suited for structural dynamics. The routine incorporates several features selected from many variations of the original Cooley and Tukey
algorithm with the goal of making the most efficient use of computer time and storage while maintaining simplicity. Some introductory material to Fourier transform techniques and a description of the original algorithm are also included. In addition, the source listing of the subroutine FFT is reproduced. Ahmad, S H and Shah, S P 'Stress-strain curves of concrete confined by spiral reinforcement' Am. Concrete Inst. J. Proceeding Volume 79 No 6 (NovemberDecember 1982) pp 4 8 4 - 4 9 0 Stress-strain curves of concrete confined with spiral reinforcement were determined. The influence of compressive strength, aggregate type, and the spacing and yield strength of hoop reinforcement was investigated. A model was developed to predict the stress-strain curves of confined concrete based on properties of the hoop reinforcement and constitutive relationship of plain concrete. The analytical model favourably predicted the results of the discussed experiments as well as other investigations. Gross, J L and McGuire, W 'Progressive collapse resistant design' J Struct. Div. ASCE Vol 109 No 1 (January 1983) pp 1 - 1 5 Progressive collapse is a situation in which a localized failure in a structure, caused by an abnormal load, triggers a cascade of failure affecting a major portion of the structure. Several alternative methods to deal with the problem of design for the prevention of progressive collapse are reviewed. A computer analysis program capable of tracing the behaviour of framed structures through collapse is explained. Of particular note is the capability to remove selectively any member in the structure and determine if collapse will result. Several examples using interactive computer graphics techniques in applying the collapse resistant design procedures are presented.
Collated by CoHos Pesquera
253