楼板参数对RC框架结构抗侧屈服机制影响非线性仿真分析  

Nonlinear simulation analysis on effect of slab parameters on lateral yield mechanism of RC frame structure

作　　者：贾益纲 刘鹏程 伍国强 吴光宇 任文国 袁志军[2] Jia Yigang;Liu Pengcheng;Wu Guoqiang;Wu Guangyu;Ren Wenguo;Yuan Zhijun(Design and Research Institute of Nanchang University,Nanchang 330047,China;School of Civil Engineering and Architecture,Nanchang University,Nanchang 330031,China;Zengcheng Country Garden Property Development Co.,Ltd.,Zengcheng 511300,China)

机构地区：[1]南昌大学设计研究院,南昌330047 [2]南昌大学建筑工程学院,南昌330031 [3]增城市碧桂园物业发展有限公司,增城511300

出　　处：《建筑结构》2019年第13期86-92,共7页Building Structure

基　　金：国家自然科学基金资助项目(51268044)

摘　　要：采用三维实体退化虚拟层合单元非线性有限元分析法对按现行规范设计的抗震等级三级的两跨六层RC空间框架模型进行仿真分析,结果表明,随水平荷载增大框架梁端负弯矩和正弯矩区域的梁板由"全开间T形截面"整体抗弯分别向"三梁"("T形翼梁"+两"梁间板带")抗弯模式和"T形翼梁抗弯"+两"梁间板膜抗拉"模式转变;楼板参数对RC框架结构抗侧刚度和抗侧承载力影响明显,板顶钢筋对RC框架结构抗侧屈服机制影响最大,板底钢筋其次、楼板厚度次之。The nonlinear finite element method based on three-dimension solid degenerated virtual laminated element theory was adopted to perform the simulation analysis on a two-bay six-story RC spatial frame model of designed as seismic grade Ⅲ according to current Chinese design code. It is concluded that with the increase of horizontal load, the beam and slab in the region with the negative and positive bending moment at the frame beam end change from the overall bending resistance in "full-bay T-section"to"three-beam" bending mode("T-wing beam"+two "beam-slab belts") and "T-wing beam bending"+two "beam-slab membrane tension" mode respectively;slab parameters have a significant impact on the lateral stiffness and lateral bearing capacity of RC frame structure. The steel bar at the top of the slab has the greatest impact on the lateral yield mechanism of RC frame structure, more than the impact of the steel bar at the bottom of the slab and the thickness of the slab.

关 键 词：RC框架 梁板柱空间协同 三维实体退化虚拟层合单元 楼板参数 抗侧屈服机制 

分 类 号：TU318[建筑科学—结构工程]