（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）

［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。

［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

中图分类号：TU318文献标识码：A文章编号：1002-848X(2019)13-0086-07

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

Jia Yigang1, Liu Pengcheng2, Wu Guoqiang2, Wu Guangyu1,  Ren Wenguo3, Yuan Zhijun2

(1 Design and Research Institute of  Nanchang University, Nanchang 330047， China; 2 School of Civil Engineering and Architecture， Nanchang University， Nanchang 330031， China;3 Zengcheng Country Garden Property Development Co., Ltd., Zengcheng 511300， China)

Abstract: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.

Keywords:RC frame; beam-slab-column spatial synergy; three-dimension solid degenerated virtual laminated element; slab parameter; lateral yield mechanism

*国家自然科学基金资助项目（51268044）。

作者简介：贾益纲，硕士，教授，博士生导师， Email: jiayigang999@sina.com。