考虑腐蚀作用的钢框架结构连续性倒塌分析

doi:10.11835/j.issn.2096-6717.2022.053

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考虑腐蚀作用的钢框架结构连续性倒塌分析
DOI:
                        10.11835/j.issn.2096-6717.2022.053
                    
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作者:
                        黄莺1,2黄莺
西安建筑科技大学，土木工程学院，西安 710055;西安建筑科技大学，国家级土木工程虚拟仿真实验教学中心，西安 710055
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李嘉晨1,2李嘉晨
西安建筑科技大学，土木工程学院，西安 710055;西安建筑科技大学，国家级土木工程虚拟仿真实验教学中心，西安 710055
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朱彦飞1朱彦飞
西安建筑科技大学，土木工程学院，西安 710055
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潘柳景泰3潘柳景泰
西安建筑科技大学，安德学院，西安 710055
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杜树4杜树
西安建筑科技大学，资源工程学院，西安 710055
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作者单位:1.西安建筑科技大学，土木工程学院，西安 710055;2.西安建筑科技大学，国家级土木工程虚拟仿真实验教学中心，西安 710055;3.西安建筑科技大学，安德学院，西安 710055;4.西安建筑科技大学，资源工程学院，西安 710055
作者简介:黄莺（1979- ），女，博士，副教授，主要从事结构连续性倒塌及安全风险研究，E-mail：cch-by@163.com。
HUANG Ying (1979- ), PhD, associate professor, main research interests: progressive collapse and security risk of structure, E-mail: cch-by@163.com.
通讯作者:
中图分类号:TU391;TU501
基金项目:陕西省自然科学基金（2020JM-494）；国家自然科学基金（51678476）

Progressive collapse analysis of steel frame structures with corrosion effect

Author:

HUANG Ying ^{^1,2}
HUANG Ying
School of Civil Engineering, Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China;National Experimental Teaching Center for Civil Engineering Virtual Simulation , Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China
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LI Jiachen ^{^1,2}
LI Jiachen
School of Civil Engineering, Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China;National Experimental Teaching Center for Civil Engineering Virtual Simulation , Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China
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ZHU Yanfei ^¹
ZHU Yanfei
School of Civil Engineering, Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China
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PAN Liujingtai ^³
PAN Liujingtai
School of Ande, Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China
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DU Shu ^⁴
DU Shu
School of Resources Engineering, Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China
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Affiliation:

1.School of Civil Engineering, Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China;2.National Experimental Teaching Center for Civil Engineering Virtual Simulation , Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China;3.School of Ande, Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China;4.School of Resources Engineering, Xi,an University of Architecture & Technology, Xi,an 710055, P. R. China

Fund Project:

Natural Science Foundation of Shaanxi (No. 2020JM-494); National Natural Science Foundation of China (No. 51678476)

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参考文献 [17]

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摘要:

为研究大气环境长期作用下钢框架结构的抗连续性倒塌性能，建立钢结构时变腐蚀模型预测构件截面面积和力学性能随服役时间的退化情况，并以一栋处于Ⅲ级大气腐蚀环境中的多层钢框架建筑为研究对象，在服役期内的不同阶段对其进行Pushdown分析。将塑性荷载系数、极限荷载系数和最大竖向位移作为结构抗倒塌能力的评价指标，通过灵敏度分析得到不同材料参数对各指标的影响情况，并基于回归分析拟合评价指标随体积损失率的退化规律。结果表明：腐蚀会导致钢框架的承载力和延性发生退化，其中延性的劣化更加明显；承载力指标的退化主要归因于材料强度的降低和构件截面面积的减少，延性指标的退化主要与材料断裂应变的减小有关；评价指标与结构体积损失率之间有较强的线性关系，可基于此对其退化情况进行定性预测。

关键词:钢框架结构;连续性倒塌;大气腐蚀;Pushdown分析;结构性能评估

Abstract:

In order to research the resistance ability to progressive collapse of steel frame structure under the long-term effects of atmospheric environment, a time-dependent corrosion model of steel structure is developed to predict the changes of cross-sectional area and mechanical properties of the members. A classical multi-story steel frame structure in a Class Ⅲ atmospheric corrosion environment is studied and the Pushdown analysis is performed at different stages of its service time. The first peak load factor, the ultimate load factor and the ultimate deformation are used as evaluation indexes for the collapse resistance ability of the structure. The influences of different material parameters on the evaluation indexes are obtained by sensitivity analysis. The variation rules of evaluation indexes with volume loss rate are obtained based on regression analysis. The results show that corrosion causes degradation of the bearing capacity and ductility of the steel frame structure, especially ductility degradation. The degradation of bearing capacity is mainly attributed to the reduction of material strength and cross-sectional area of the members. The degradation of ductility is attributed to the decrease in steel elongation. There is a strong linear relationship between the evaluation indexes and the volume loss rate, which can be used to qualitatively predict the degradation of structural performance.

Key words:steel frame structures;progressive collapse;atmospheric corrosion;pushdown analysis;structural performance evaluation

参考文献

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引用本文

黄莺,李嘉晨,朱彦飞,潘柳景泰,杜树.考虑腐蚀作用的钢框架结构连续性倒塌分析[J].土木与环境工程学报（中英文）,2023,45(6):21-28. HUANG Ying, LI Jiachen, ZHU Yanfei, PAN Liujingtai, DU Shu. Progressive collapse analysis of steel frame structures with corrosion effect[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2023,45(6):21-28.10.11835/j. issn.2096-6717.2022.053

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收稿日期:2021-12-29
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