空腹式型钢混凝土异形柱中框架抗侧刚度试验研究  

EXPERIMENTAL STUDY ON LATERAL STIFFNESS OF LATTICE STEEL REINFORCED CONCRETE MIDDLE FRAME WITH SPECIAL-SHAPED COLUMNS

作　　者：薛建阳[1] 高亮[1] 刘祖强[1] 赵鸿铁[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《工程力学》2013年第9期34-40,46,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(50978217);教育部高等学校博士学科点专项科研基金项目(20096120110005);教育部"创新团队发展计划"项目;陕西省留学人员科技活动择优项目(陕外专发[2010]26号);中建股份有限公司科技研发课题项目(CSCEC-2009-Z-31)

摘　　要：通过对1榀1/2.5比例两跨三层的空腹式型钢混凝土(SRC)异形柱中框架在反复荷载作用下的试验研究,分析了结构的弹塑性特征以及整体和层间抗侧刚度的退化过程。通过分析可知:空腹式SRC异形柱框架沿竖向的刚度分布较均匀;层刚度与整体刚度的退化均表现出由快到慢的规律;获得了层间位移角的变化与层刚度退化之间的关系;结构正、负向弹塑性性能接近,极限层间位移角大于规范规定的限值,抗倒塌能力强;空腹式型钢混凝土异形柱中框架的延性优于钢筋混凝土异形柱框架;结构破坏时可以形成梁铰机制,符合"强柱弱梁"的要求。According to the experimental study on a 1/2.5-scaled model of two-span and three-story middle frame composed of reinforced concrete beams and lattice steel reinforced concrete （SRC） special-shaped columns under reversed loading, the elasto-plastic feature, integral and inter-story lateral stiffness degradation of the structure were analyzed. The test results indicate that the lattice steel reinforced concrete middle frame has uniform vertical stiffness, the degradation of which shows a fast to slow regulation. The relationship between story drift and the ratio of story stiffness degradation was obtained. The elasto-plastic behavior of the structure in positive and negative directions is similar. The ultimate elasto-plastic story drift rotation is larger than the limit value specified by the code, indicating the high capacity of collapse resistance. Compared with the reinforced concrete frame with special-shaped columns, the ductility of lattice SRC frame structure is better. The failure mechanism of the structure is the beam-hinged mechanism, satisfying the seismic design principle of ＂Strong Column and Weak Beam＂.

关 键 词：空腹式配钢 型钢混凝土 异形柱框架 抗侧刚度 弹塑性性能 

分 类 号：TU398.2[建筑科学—结构工程] TU317.1