- 摘 要
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（1 南昌大學設計研究院， 南昌 330047； 2南昌大學建筑工程學院， 南昌 330031；3 增城市碧桂園物業(yè)發(fā)展有限公司， 增城 511300）
［摘要］采用三維實體退化虛擬層合單元非線性有限元分析法對按現(xiàn)行規(guī)范設計的抗震等級三級的兩跨六層RC空間框架模型進行仿真分析，結果表明，隨水平荷載增大框架梁端負彎矩和正彎矩區(qū)域的梁板由“全開間T形截面”整體抗彎分別向“三梁”（“T形翼梁”+兩“梁間板帶”）抗彎模式和“T形翼梁抗彎”+兩“梁間板膜抗拉”模式轉變；樓板參數(shù)對RC框架結構抗側剛度和抗側承載力影響明顯，板頂鋼筋對RC框架結構抗側屈服機制影響最大，板底鋼筋其次、樓板厚度次之。
［關鍵詞］RC框架； 梁板柱空間協(xié)同； 三維實體退化虛擬層合單元； 樓板參數(shù)； 抗側屈服機制
中圖分類號：TU318文獻標識碼：A文章編號：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 "Twing 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
*國家自然科學基金資助項目（51268044）。
作者簡介：賈益綱，碩士，教授，博士生導師， Email: jiayigang999@sina.com。
