低周反复荷载作用下T形截面钢异形柱抗震性能试验研究  

Experimental research on steel specially shaped columns with T-section under cyclic loading

作　　者：张爱林[1] 于劲[1,2] 徐敏[1] 李健[1] 刘会军[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京市住宅建筑设计研究院有限公司,北京100005

出　　处：《建筑结构学报》2010年第2期20-28,共9页Journal of Building Structures

基　　金：国家自然科学基金项目(50878008);北京市拔尖创新人才及创新团队资助项目(00400054R4901);北京工业大学城市与工程安全减灾教育部重点实验室;工程抗震与结构诊治北京市重点实验室项目

摘　　要：通过8个1∶2缩尺的T形截面钢异型柱在低周反复荷载作用下的拟静力试验,研究了试件的变形形态、破坏模态,得到了试件的滞回曲线、骨架曲线、承载能力、延性性能、耗能能力等抗震性能,分析了翼缘宽厚比、腹板高厚比和轴压比等参数对抗震性能的影响。考虑试件的初始缺陷、材料非线性和几何非线性进行了有限元计算分析。有限元计算和试验结果表明,在轴压比和翼缘宽厚比、腹板高厚比满足限值的条件下,T形截面钢异形柱在罕遇地震作用时,其破坏模态为局部屈曲失稳的塑性破坏,变形以塑性为主且发展较充分,有较高的承载能力,具备较好的延性性能和耗能能力,能够在强震区使用。本研究为工程应用和钢异形柱结构技术规程的编制提供参考。Pseudo-static tests on 8 steel columns with T-section models of 1 ： 2 geometrical scale and equal stress under cyclic loading were reported. The deformation properties, failure mode were discussed, and the hysteretic loops, skeleton curves, bearing capacity, ductility and energy-dissipation were investigated. As a result, the effect of flange width-thickness ratio, web depth-thickness ratio and axial compression ratio were reviewed. Testing results indicate that the steel specially shaped column with T-section has excellent bearing capacity, good ductility and energy dissipation if certain flange width-thickness ratio, web depth-thickness ratio and axial compression ratio conditions are appropriate. Finite-element analysis were conducted based on initial geometric imperfection and geometric nonlinearity, and the results were close to those from the tests. The typical failure mode was local buckling instability with sufficient plastic deformation. Study evidence shows that steel specially shaped columns with T-section can be used in buildings in seismic regions. This study can provide background for practical engineering applications and design specification for steel structures with specially shaped columns.

关 键 词：T形截面钢异形柱 宽厚比 拟静力试验 有限元计算 抗震性能 

分 类 号：TU392.1[建筑科学—结构工程] TU317.1