不同加载角L形柱的试验及截面承载力分析  

EXPERIMENT AND BEARING CAPACITY ANALYSIS OF R.C.L SHAPED COLUMN UNDER DIFFERENT DIRECTIONAL CYCLIC LOADING

作　　者：王茜[1] 刁波[1] 李淑春[1] 罗佑新[1] 张绍兴[1] 

机构地区：[1]北京航空航天大学土木工程系,北京100083

出　　处：《工业建筑》2008年第9期53-58,共6页Industrial Construction

基　　金：国家自然科学基金项目资助(50678016)

摘　　要：L形截面柱作为异型柱结构中的主要柱型之一,人们对其进行了大量的试验研究,但基本上都忽略了附加扭矩的影响。实际上,由于截面的特殊性,其剪力中心和截面形心并不重合,L形柱处于压、弯、剪、扭的复合受力状态。在试验的基础上,考察了在低周反复荷载作用下,不同加载角L形柱所产生的扭转效应,并借鉴规范对复合受力构件的剪扭承载力计算方法,定量地分析了附加扭矩对L形柱所产生的影响。同时,通过对试验结果的分析及编制非线性程序,得出了L形柱在水平低周反复荷载作用下的最不利加载角度。As one of the primary shapes of reinforced concrete special-shaped column frame, much studies ignoring additional torsion effect have finished on L shaped columns. In fact, because of the special section, L shaped column＇s shear center is not coincided with the centroid of section, and it is under the combined loads of normal force, bending, shear and warping torsion. The additional torsional effect of L shaped column under different directional cyclic loading is discussed by means of experimental study, and the quantitative analysis is made according to GB code about the bearing capacity calculation method of a component under combined loads. Meanwhile, the worst horizontal direction is found through analysis of test results and nonlinear program.

关 键 词：不同加载角 L形柱 附加扭转 试验研究 承载力 

分 类 号：TU375.3[建筑科学—结构工程] TU375.302