构件抗力与多层钢框架结构抗倒塌能力的关联性分析  

Correlation analysis between member resistance and collapse resistance of multi-storey steel frame structures

作　　者：钟炜辉[1,2] 郑玉辉 谭政 孟宝 ZHONG Weihui;ZHENG Yuhui;TAN Zheng;MENG Bao(School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《中南大学学报（自然科学版）》2023年第5期1990-2005,共16页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(52178162);陕西省重点研发计划项目(2018ZDXM-SF-097);陕西省教育厅重点科学研究计划项目(20JY033)。

摘　　要：讨论构件抗力与结构抗力的关联性,分别给出不同结构参数下(层数与跨数)层间抗弯能力、层间水平约束以及大变形阶段层间极限轴力的计算模型。借助构件性能指标并结合各层构件的实际受力状态(包括拉弯、受弯和压弯),得到多层框架起始屈服抗力、最终屈服抗力与极限抗力的计算式。通过可靠的数值模型对多层钢框架模型抗力评估过程的3个步骤进行验证与分析。研究结果表明,多层框架层间内力主要体现为小变形阶段层间抗弯能力与大变形阶段层间轴力的差异;计算结果与数值结果较为接近,该理论方法可体现层间内力的相互作用并建立构件与结构抗力之间的关系,为多层钢框架抗倒塌能力的评估与计算提供参考。The correlation between member and structure resistance was discussed.The calculation methods of inter-storey bending capacity,inter-storey horizontal constraint,and inter-storey ultimate axial force in large deformation stage at different structural parameters(number of storeys and spans) were given respectively.The calculation equations of initial,final and ultimate resistance of multi-storey frame were proposed based on the member performance index and the actual stress state of each-layer members(including tension bending,bending and compression bending) under a column-removed condition.Using a reliable numerical model,the three steps of the resistance evaluation of multi-storey steel frame models were verified and analyzed.The results show that the evolution law of inter-storey internal force of multi-storey frame is mainly reflected in the difference between interstorey flexural capacity and inter-storey axial force in small and large deformation stage,respectively.The calculated results are in agreement with numerical results.This theoretical method can reflect the interaction of internal forces between layers and establish the relationship between members and structure resistance,which provides a reference for the evaluation and calculation of collapse resistance of multi-layer steel frames.

关 键 词：连续倒塌 多层钢框架 层间约束 倒塌抗力 理论计算 

分 类 号：TU391[建筑科学—结构工程]