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（1 南昌大學(xué)設(shè)計(jì)研究院， 南昌 330047； 2 南昌大學(xué)建筑工程學(xué)院， 南昌 330031；3 北京北國建筑工程有限責(zé)任公司， 北京 100068）

［摘要］采用三維實(shí)體退化虛擬層合單元非線性有限元分析法，考慮梁板柱空間協(xié)同效應(yīng)，經(jīng)對(duì)一水平荷載作用單跨單層RC空間框架試驗(yàn)和一雙跨四層RC空間框架底層邊柱失效豎向倒塌試驗(yàn)進(jìn)行模擬分析并與其試驗(yàn)結(jié)果對(duì)比驗(yàn)證之后，對(duì)按現(xiàn)行規(guī)范設(shè)計(jì)抗震等級(jí)二級(jí)和三級(jí)的雙跨六層RC空間框架模型進(jìn)行非線性有限元分析與研究，得出梁板空間協(xié)同經(jīng)歷“全開間T形截面”整體抗彎向“T形翼梁”＋2“板帶”抗彎機(jī)制轉(zhuǎn)變；下部框架梁先行出鉸，加快底層框架柱塑性鉸出現(xiàn)，進(jìn)而導(dǎo)致上部框架柱彎矩增大；抗震等級(jí)一級(jí)、二級(jí)RC框架能夠達(dá)到“強(qiáng)柱弱梁”預(yù)期效果，而三級(jí)、四級(jí)框架則不能完好或不能實(shí)現(xiàn)“強(qiáng)柱弱梁”抗震設(shè)計(jì)機(jī)制等研究結(jié)論。

［關(guān)鍵詞］RC框架； 梁板柱空間協(xié)同； 強(qiáng)柱弱梁； 三維實(shí)體退化虛擬層合單元； 非線性分析

中圖分類號(hào)：TU375文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)07-0043-09

Nonlinear simulation analysis on “strong-column-weak-beam” seismic design effect considering beam-slab-column spatial collaboration of RC frame structure

Jia Yigang1, Ren Wenguo2, Wu Guangyu1, Yuan Zhijun2, Li Huan3

(1 Design and Research Institute,Nanchang University, Nanchang 330047, China; 

2 School of Civil Engineering and Architecture,  Nanchang University,  Nanchang 330031, China; 

3 Beijing Beiguo Building Engineering Co.,  Ltd.,  Beijing  100068, China)

Abstract: The nonlinear finite element method based on degenerated three-dimensional solid virtual laminated element theory was introduced considering the spatial synergy of  beam-slab-column. The validity and efficiency of the method were proved by analysis on a single-span and single-layer RC spatial frame experiment and bottom side column collapse failure test of a two-span and four-layer RC spatial frame under horizontal load. According to the current Chinese codes, two-span and six-story RC spatial frame models of seismic grade 2 and grade 3 were analyzed respectively by the method. Analysis results are concluded that the bending mechanism of beam-slab-column spatial collaboration has experienced the transformation from “whole span T-section”to“T-shaped spar” +2 “plate-strip”; the plastic hinges of frame beam in the lower layer first appeared, which accelerates appearance of the plastic hinges of the bottom frame column, and then leads to the increase of the bending moment of frame column in the upper layer. RC frames of seismic grade 1 and grade 2 can achieve the excepted effect of "strong-column-weak-beam", while RC frames of seismic grade 3 and grade 4 can not fully or can not realize the "strong-column-weak-beam" seismic design mechanism.

Keywords:RC frame; spatial synergy of beam-slab-column; strong-column-weak-beam; degenerated three-dimensional solid virtual laminate element; nonlinear analysis

*國家自然科學(xué)基金資助項(xiàng)目（51268044）。

通訊作者：吳光宇，博士，教授級(jí)高級(jí)工程師，Email: wuguangyu@ncu.edu.cn。