安全与环境工程2025，Vol.32Issue(5)：137-146,10.DOI:10.13578/j.cnki.issn.1671-1556.20231336
基于能量与损伤演化模型的装配式钢管混凝土支撑变形机理
Deformation mechanism of assembled concrete-filled steel tube brace based on energy evolution model and damage evolution model
摘要
Abstract
Research on the deformation mechanism of assembled brace can provide theoretical basis for related engineering applications and promote the sustainable development of corresponding industries.In order to further study the deformation mechanism of assembled concrete-filled steel tube brace,two sets of full-size columnar specimens made of concrete-filled steel tube were prepared,and then two sets of uniaxial compressive model tests were carried out on the specimens.Besides,an energy evolution model of specimens was established based on the test results,and a damage evolution model of specimens was proposed combining the energy parameters and damage mechanics.The research results show that the pre-peak deformation of specimens consists of three stages,and the tensile crack of concrete at the ends of specimens is the main cause of final failure.The installation of steel tube and the increase of thickness of concrete can improve the deformation resistance of specimens.The energy evolution model performs well in analyzing the energy evolution process of specimens,and the process of energy input,energy storage and energy dissipation have obvious correspondence with each deformation stage of specimens.The increase of thickness of concrete increases the stored energy inside specimens,resulting in the necessity to input more energy to complete the deformation process of specimens.The damage evolution model performs well in analyzing the damage evolution process of specimens,and the damage degree of specimens is positively correlated with the dissipative energy and deformation degree of specimens.Considering that the actual damage degree of specimens is less than 1,the first two damage evolution stages of specimens should be emphasized in related model test and engineering application.With the increase of concrete thickness,the damage process of specimens slows down and the final damage degree increases.The residual acceptable damage degree of specimens can be used to evaluate the residual deformation resistance of specimens.The research results are conducive to further understanding the deformation mechanism of assembled concrete-filled steel tube brace and provide theoretical basis for related engineering applications.关键词
装配式支撑/钢管混凝土/变形机理/能量演化模型/损伤演化模型Key words
assembled brace/concrete-filled steel tube/deformation mechanism/energy evolution model/damage evolution model分类
资源环境引用本文复制引用
申培武,欧阳冬,何成..基于能量与损伤演化模型的装配式钢管混凝土支撑变形机理[J].安全与环境工程,2025,32(5):137-146,10.基金项目
国家重点研发计划项目(2019YFC0605100) （2019YFC0605100）
武汉地铁集团科研计划项目(GS-JZ-1226) （GS-JZ-1226）
