楼板及其配筋在RC框架结构实现抗震延性机制中的作用分析  

Role of Slabs and Reinforcement in Implementation of the Seismic Ductility Mechanism of RC Frame Structures

作　　者：王贵珍[1] 周玲珑 谭潜 罗文文[5] 祝飞水[6] WANG Guizhen;ZHOU Linglong;TAN Qian;LUO Wenwen;ZHU Feishui(Chongqing Vocational Institute of Engineering, Chongqing 402260, China;Chengdu University, Chengdu 610106, Sichuan, China;CMCU Engineering Co., Ltd., Chongqing 400039, China;School of Civil Engineering, Chongqing University, Chongqing 400045, China;School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China;Jinke Real Estate Group Co., Ltd., Chongqing 400040, China)

机构地区：[1]重庆工程职业技术学院,重庆402260 [2]成都大学,四川成都610106 [3]中机中联工程有限公司,重庆400039 [4]重庆大学土木工程学院,重庆400045 [5]重庆科技学院建筑工程学院,重庆401331 [6]金科地产集团股份有限公司,重庆400040

出　　处：《地震工程学报》2021年第2期421-429,452,共10页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(51808087);重庆市自然科学基金项目(cstc2018jcyjAX0052);重庆市勘察设计行业创新研究与能力建设项目。

摘　　要：总结采用梁有效翼缘来考虑楼板及配筋对“强柱弱梁”机制形成的影响的实验和数值仿真研究。基于SAP2000采用三种侧向加载模式对RC框架结构不带楼板、不带楼板考虑梁刚度放大、带楼板的三个模型进行pushover分析,对力与位移的关系曲线、塑性铰的出铰顺序以及顶点位移与层间位移等方面进行探讨。结果表明:三个模型的“强柱弱梁”现象不带楼板的纯框架结构最明显,考虑梁刚度放大的模型次之,带楼板结构最不明显,证明负弯矩承载力和刚度等反映“强柱弱梁”的参数及塑性铰的出现顺序与楼板、板内配筋存在明显的对应关系;楼板及配筋影响框架结构的整体变形性能和塑性耗能能力,是抗震延性机制实现的重要影响因素。在后续的结构设计中,建议考虑实际楼板和钢筋建模进行计算分析。The implementation premise for seismic ductility mechanism of building structures is that the basic design principles such as"strong column-weak beam"are carried out actually.In previous earthquakes,seismic damage of RC frame structures run counter to the seismic ductility mechanism.In this paper,the experiment and simulation study of the influence of slab and reinforcement on the formation of"strong column-weak beam"mechanism by using effective flange of beam were summarized.Based on SAP2000 software,pushover analysis were carried out on three models of RC frame structures,i.e.,structure without floor,structure without floor but considering beam stiffness amplification,and structure with floor by using three lateral loading modes.The relationship curve of force and displacement,the order of plastic hinge,the top displacement,and inter story displacement were analyzed.The results showed that:the phenomenon of"strong column and weak beam"in pure frame structure without floor slab is the most obvious,followed by the model considering the beam stiffness amplification,and that in structure with floor slab is the least obvious.It is proved that the negative moment bearing capacity,stiffness,and other parameters reflecting"strong column and weak beam"and the occurrence order of plastic hinge have obvious corresponding relations with floor slab and in-plate reinforcement.The floor slab and reinforcement,which affect the overall deformation performance and plastic energy dissipation capacity of frame structures,are important influencing factors for the realization of seismic ductility mechanism.In subsequent structural design,it is suggested to consider the actual floor and reinforcement modeling for calculation and analysis.

关 键 词：现浇楼板 RC框架结构 强柱弱梁 延性机制 静力弹塑性分析 

分 类 号：P315.5[天文地球—地震学] P315.9[天文地球—固体地球物理学]