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Seismic vulnerability evaluation of axially loaded steel built-up laced members I:experimental results 被引量:4
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作者 Kangmin Lee Michel Bruneau 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2008年第2期113-124,共12页
An experimental program was initiated to investigate the seismic performance of built-up laced steel brace members. Quasi-static testing of twelve typical steel built-up laced member (BLM) specimens was conducted. T... An experimental program was initiated to investigate the seismic performance of built-up laced steel brace members. Quasi-static testing of twelve typical steel built-up laced member (BLM) specimens was conducted. These were designed to span a range of parameters typically encountered for such members based on findings from a survey of commonly used shapes and details that have been historically used. The specimens were subdivided into groups of three different cross-sectional shapes, namely built-up I-shape section, and built-up box shapes buckling about the x or the y axis. Within each group, global and local buckling slenderness ratios had either kl/r values of 60 or 120, and b/t ratios of 8 or 16. The specific inelastic cyclic behavior germane to each specimen, and general observations on overall member hysteretic behavior as a function of the considered parameters, are reported. A companion paper (Lee and Bruneau 2008) investigates this observed response against predictions from analytical models, and behavior in the perspective of system performance. 展开更多
关键词 quasi-static testing built-up laced compression member experimental program BRACE
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Seismic vulnerability evaluation of axially loaded steel built-up laced members II:evaluations 被引量:2
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作者 Kangmin Lee Michel Bruneau 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2008年第2期125-136,共12页
The test results described in Part 1 of this paper (Lee and Bruneau, 2008) on twelve steel built-up laced members (BLMs) subjected to quasi-static loading are analyzed to provide better knowledge on their seismic ... The test results described in Part 1 of this paper (Lee and Bruneau, 2008) on twelve steel built-up laced members (BLMs) subjected to quasi-static loading are analyzed to provide better knowledge on their seismic behavior. Strength capacity of the BLM specimens is correlated with the strength predicted by the AISC LRFD Specifications. Assessments of hysteretic properties such as ductility capacity, energy dissipation capacity, and strength degradation after buckling of the specimen are performed. The compressive strength of BLMs is found to be relatively well predicted by the AISC LRFD Specifications. BLMs with smaller kl/r were ductile but failed to reach the target ductility of 3.0 before starting to fracture, while those with larger kl/r could meet the ductility demand in most cases. The normalized energy dissipation ratio, EC/ET and the normalized compressive strength degradation, Cr″/Cr of BLMs typically decrease as normalized displacements δ/δb,exp increase, and the ratios for specimens with larger kl/r dropped more rapidly than for specimens with smaller kl/r; similar trends were observed for the monolithic braces. The BLMs with a smaller slenderness ratio, kl/r, and width-to-thickness ratio, b/t, experienced a larger number of inelastic cycles than those with larger ratios. 展开更多
关键词 seismic vulnerability built-up compression member strength capacity ductility capacity energy dissipation strength degradation
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Model of the Bearing Capacity of Concrete Little Eccentric Compressive Flexural Members Affected by Rebar Corrosion
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作者 张克强 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2006年第z1期108-111,共4页
The assessment for bearing capacity of corroded RC members is one of the main component of durability study on RC structure. But few researches had been developed for the study of corroded RC eccentric especially litt... The assessment for bearing capacity of corroded RC members is one of the main component of durability study on RC structure. But few researches had been developed for the study of corroded RC eccentric especially little eccentric compressive members. By discussing the effect of factors, such as decrease of concrete strength in biaxial stress condition during pre-cracking stage and torsion buckling of local cracking concrete during post-cracking stage, on the bearing capacity of little eccentric RC members, the model of bearing capacity is established respectively, which the cracking damage coefficient of concrete k is suggested to be 0.15 in post-cracking stage. The experimental certification shows: model calculation fits well with experimental result, which proves the effectiveness of the model in this paper. 展开更多
关键词 little eccentric compressive flexure members biaxial stress concrete cracking torsion buckling
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Finite Element Calculation of the Flexural Stiffness of Corroded RC Eccentric Compressive Members
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作者 张华 卫军 +1 位作者 潘硚 黄滢 《Journal of Southwest Jiaotong University(English Edition)》 2010年第4期303-308,共6页
A finite element calculation model of corroded RC eccentric compressive members was build using finite element software ANSYS. The model considers the decline of mechanical properties and the effective section of a co... A finite element calculation model of corroded RC eccentric compressive members was build using finite element software ANSYS. The model considers the decline of mechanical properties and the effective section of a corroded steel bar,as well as the deterioration of bond character between corroded reinforcement and concrete. The reliability of the finite element model was evaluated by comparing the results of the finite element calculation with the data from experiments. Based on the finite element analysis results,the influence of corrosion degree,the diameter change of the longitudinal reinforcing bars and the spacing change of stirrups on the flexural stiffness were calculated and analyzed. 展开更多
关键词 Reinforced concrete eccentric compressive members Flexural stiffness Finite element method Corrosion degree Diameter of longitudinal reinforcing bars Stirrup spacing
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Experiment on aluminum alloy members under axial compression 被引量:3
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作者 Xiaonong GUO Shuiping LIANG Zuyan SHEN 《Frontiers of Structural and Civil Engineering》 CSCD 2015年第1期48-64,共17页
To improve the design methods of Chinese aluminum alloy members, experiment of 63 profiled aluminum alloy members, made of Chinese aluminum alloy 6061-T6, under axial compression is conducted in this paper. Valuable e... To improve the design methods of Chinese aluminum alloy members, experiment of 63 profiled aluminum alloy members, made of Chinese aluminum alloy 6061-T6, under axial compression is conducted in this paper. Valuable experimental data are obtained. At the same time, in order to obtain the relevant data, a large number of other experimental data from published papers and technical reports are collected and sorted out. 167 valid experimental data points are obtained finally. Furthermore, for the purpose of creating column curves, the aluminum alloy members under the axial compression, used in experiments, are analyzed by means of FEM. Based on the numerical results, 2 column curves are created by means of the numerical fitting method. The column curves are compared with the calculated data according to the experimental results for verification, and also are verified with the curves in design codes of several relevant countries. The numerical results show that the column curves obtained in this paper are valid and reliable. 展开更多
关键词 aluminum alloy column curve compression members overall stability coefficient
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