现浇柱预制梁框架单调静力性能试验与内力计算方法研究  

MONOTONIC TEST AND CALCULATION METHOD OF CONCRETE FRAME WITH PRECAST BEAMS AND CAST-IN-PLACE COLUMNS

作　　者：杨新磊[1,2] 薛伟辰[1] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]天津城建大学土木工程学院,天津300384

出　　处：《工程力学》2013年第10期100-107,共8页Engineering Mechanics

基　　金：国家"十二五"科技支撑计划项目(2010BAK69B28);新世纪优秀人才支持计划项目(NCET-10-0636);中央高校基本科研业务费专项资金项目(0210219056);住房和城乡建设部研究开发项目(2011-K2-21);上海市科委重大项目(10dz0583700);国家自然科学基金项目(51208336)

摘　　要：通过一榀1∶4平面框架的单调静力荷载试验,对六层两跨现浇柱预制梁框架的破坏形态、破坏机制、位移延性等进行了较为系统的研究。研究表明:现浇柱预制梁框架实现了预期的混合破坏机制,试验过程中在梁端首先出现塑性铰,在二、三层梁端出现多个塑性铰后柱端出现塑性铰;试件受力全过程中节点核心区箍筋始终处于弹性阶段;框架整体位移延性为6.3;试验框架实现了预期的"强柱弱梁"、"强节点"等设计目标,这表明参照现行混凝土框架抗震设计方法进行现浇柱预制梁框架设计是可行的。基于MIDAS软件对考虑预制混凝土梁截面刚度折减以及考虑节点刚度折减的、预制混凝土框架内力计算方法进行了研究,并提出了有关建议。A six-story two-bay concrete plane frame with precast beams and cast-in-place columns was tested under monotonic loading, and the behavior of the specimen was evaluated based on failure modes, failure mechanism, displacement ductility, etc. The results indicated that the specimen attained the anticipated failure mechanism, i.e. a mixed mechanism. Plastic hinges firstly appeared in the beam-end, and the plastic hinge did not appear at the column-end until a number of plastic hinges formed at the second and third floor beam-ends during the test. The stirrups in the joint were elastic from beginning to end. The global displacement ductility factor of the specimen was 6.3, which suggested that it was a feasible method to design concrete frames with precast concrete beams and cast-in-place concrete columns in conformity with the current standard anti-seismic design of cast-in-place reinforced concrete structures. The internal force calculation method considering the reduced rigidity of precast beams and the internal force calculation method considering the reduced connection stiffness were investigated by MIDAS, and primary suggestions for calculating internal force of precast concrete frames were presented.

关 键 词：框架 试验 破坏机制 延性 塑性铰 

分 类 号：TU375.4[建筑科学—结构工程]