[1]王景玄、杨永、沈亚军.钢管混凝土框架-填充墙结构抗连续倒塌分析[J].郑州大学学报(工学版),2021,42(02):19-24.[doi:10.13705/j.issn.1671-6833.2021.02.004]
　WANG Jingxuan,YANG Yong,SHEN Yajun.Progressive Collapse Analysis of Composite Planar Frame with CFST Columns and Full-height Infill Walls[J].Journal of Zhengzhou University (Engineering Science),2021,42(02):19-24.[doi:10.13705/j.issn.1671-6833.2021.02.004]
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钢管混凝土框架-填充墙结构抗连续倒塌分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
42
期数:
2021年02期
页码:
19-24
栏目:
出版日期:
2021-04-12

文章信息/Info

Title:
Progressive Collapse Analysis of Composite Planar Frame with CFST Columns and Full-height Infill Walls
作者:
王景玄、杨永、沈亚军
兰州理工大学土木工程学院;
Author(s):
WANG Jingxuan;  YANG Yong;  SHEN Yajun
School of Civil Engineering, Lanzhou University of Technology;
关键词:
Keywords:
concrete-filled steel tube;  infill walls;  progressive collapse;  mechanism analysis;  numerical simulation
DOI:
10.13705/j.issn.1671-6833.2021.02.004
文献标志码:
A
摘要:
为了进一步研究填充墙对钢管混凝土组合框架抗连续倒塌机理和承载力的影响，该文基于ABAQUS/Explicit分析方法，以中柱失效工况为例，建立了全填充墙作用的钢管混凝土柱-组合梁平面框架结构抗连续倒塌数值模型，合理选取了钢材、混凝土、填充墙砌体等材料本构模型和不同构件之间的约束模型，根据实际工况考虑了组合梁构件端部水平拉结作用，并与已有研究学者的试验数据进行了对比分析，以验证建模方法的合理性。在此基础上，计算了考虑填充墙作用的钢管混凝土柱-组合梁平面框架失效柱柱顶荷载-位移全过程曲线和填充墙局部破坏特征，并与钢管混凝土柱-组合梁平面框架计算结果进行了对比，分析了填充墙对钢管混凝土框架倒塌承载力和破坏机理的影响。研究结果表明，竖向荷载作用下，钢管混凝土柱-组合梁平面框架抗连续倒塌全过程受力机制包括：梁机制、悬链线机制和破坏阶段；填充墙能够显著提高钢管混凝土柱-组合梁平面框架的抗连续倒塌承载力，在梁机制阶段承载力影响更加明显，填充墙的受力主要通过沿对角方向产生斜压杆支撑作用形成。因此，建议该类结构的抗连续倒塌设计中不可忽略填充墙的作用。
Abstract:
To study the anti-progressive collapse mechanism and failure characteristics of the CFST frame under the failure of key column, using the ABAQUS/Explicit analysis method,this paper developed a 3D finite element model this paper developed a 3D finite element model of CFST frame considering the full-height infilled walls. The material constitutive model of steel, concrete, infilled wall masonry and the restraint model between different components were selected reasonably.According to the actual working conditions, the horizontal tie-in effect at the end of composite beam was considered, and compared with the experimental data of existing researchers to verify the rationality of the modeling method.On this basis, the load displacement curve of CFST composite plane frame with infilled wall was calculated, and the local failure characteristics of infilled wall were analyzed,and compared with those of CFST composite frame, and the influence of infilled wall on collapse bearing capacity and failure mechanism of CFST frame was analyzed.Results show that, under the vertical load, the whole process stress mechanism of CFST composite plane frame anti-progressive collapse mechanism includes: beam mechanism, catenary mechanism and failure stage；the infilled wall could significantly improve the anti-progressive collapse bearing capacity of the CFST composite frame, the bearing capacity was more obvious in the beam mechanism stage. The bearing capacity of the infilled wall was mainly formed by the diagonal compression brace supporting. Therefore, it was suggested that the role of infill wall should not be ignored in the design of progressive collapse resistance of such structures.

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更新日期/Last Update: 2021-05-30