[1]刘金龙,张 健,林均岐,等.RC框架结构地震倒塌及其废墟影响范围研究[J].西安建筑科技大学学报(自然科学版),2023,55(02):262-270.[doi:10.15986/j.1006-7930.2023.02.015 ]
　LIU Jinlong,ZHANG Jian,LIN Junqi,et al.Study on earthquake collapse of RC frame structure and influence range of ruins[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(02):262-270.[doi:10.15986/j.1006-7930.2023.02.015 ]
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RC框架结构地震倒塌及其废墟影响范围研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年02期
页码:
262-270
栏目:
出版日期:
2023-04-28

文章信息/Info

Title:
Study on earthquake collapse of RC frame structure and influence range of ruins
文章编号:
1006-7930(2023)02-0262-09
作者:
刘金龙1; 2; 张 健3; 林均岐1; 2; 陈 晨1; 2
(1.中国地震局工程力学研究所 地震工程与工程振动重点实验室,黑龙江 哈尔滨 150080; 2.地震灾害防治应急管理部重点实验室,黑龙江 哈尔滨 150080; 3.上海建工二建集团有限公司,上海 200090)
Author(s):
LIU Jinlong1; 2;  ZHANG Jian3;  LIN Junqi1; 2;  CHEN Chen1; 2
(1.Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration; Herbin 150080, China; 2.Key Laboratory of Earthquake Disaster Mitigation, Ministry of Emergency Management.Herbin 150080, China; 3.Shanghai Construction Engineering Group Co.Ltd., Shanghai 200090, China)
关键词:
RC框架结构;  地震;  倒塌过程;  废墟; 影响范围
Keywords:
RC frame structure;  earthquake;  collapse process;  ruin;  influence range
分类号:
TU375.4
DOI:
10.15986/j.1006-7930.2023.02.015
文献标志码:
A
摘要:
钢筋混凝土框架结构作为一种通用结构形式,已经广泛应用于国内外的土木建筑行业,随着框架结构的应用和发展,对其所开展的研究工作也非常深入和全面.然而,目前对于框架结构地震倒塌及其倒塌后对周边造成影响范围的研究依然是难点之一,且对该方面的研究还非常少.针对Abaqus软件本身材料模型在倒塌阶段适用性差的问题,本文基于Vumat子程序开发了与应变率相关的混凝土、钢筋材料大应变本构关系模型,并通过与实验数据的对比验证了所开发材料模型的准确性.利用开发的本构关系模型,建立了四层钢筋混凝土框架结构,基于单元删除法模拟了框架结构在地震动作用下的倒塌全过程,对结构的倒塌机理及其倒塌后的影响范围进行了分析.结果表明:底层轴压比较大的框架柱会率先破坏,水平地震动的破坏作用主要体现在柱脚部位而竖向地震动则主要体现在框架柱的中上部位; 竖向地震动对结构倒塌时的侧移及梁、板、柱的破坏状态及废墟分布有很大影响; 不同地震作用下,框架结构的倒塌影响范围高度比一般在0.5以内.
Abstract:
As a general structural form, reinforced concrete frame structure has been widely used in civil construction industry at home and abroad.With the application and development of frame structure, the research work carried out on it is also very in-depth and comprehensive.However, at present, it is still difficult to study the seismic collapse of RC frame structureand its impact on the surrounding area,and the research on this aspect is still very few.To solve the problem of poor applicability of Abaqus material model in collapse stage, a large strain constitutive relationship model of concrete and steel material related to strain rate were developed based on Vumat subroutine, and the accuracy of the developed constitutive modelswere verified by comparing with experimental data.Based on the developed constitutive model, a four-story RC frame structure was established, and the whole process of seismic collapse of the structure under the action of ground motion time history was simulated by element deletion method.The collapse mechanism of the structure and the influence range after collapse were analyzed.The results show that the column with large axial pressure at the bottom will be destroyed first, and the damage of horizontal ground motion is mainly concentrated at the column foot, while the impact of vertical ground motion is mainly concentrated on middle and upper part of the column.Both the failure states of beams, slabs, columnsand the influence range are greatly impacted by vertical ground motion.Under different earthquakes, most of the collapse influence range height ratios of RC frame structure are less than 0.5.

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备注/Memo

备注/Memo:
收稿日期:2022-07-11修改稿日期:2023-02-24
基金项目:黑龙江省自然科学基金联合引导项目(LH2021E123)
第一作者:刘金龙(1978—),男,博士,副研究员,主要从事地震工程灾害模拟、防灾减灾工程等研究. E-mail: liujinlong@iem.ac.cn
通信作者:陈 晨(1997—),男,硕士生,主要从事结构抗震研究。E-mail: chenchester2019@163.com
更新日期/Last Update: 2023-04-20