配筋空心方钢管高强混凝土纯弯构件受力性能有限元分析
Finite Element Analysis on Flexural Performance of Reinforced Hollow High Strength Concrete Filled Steel Tube Members
杨志坚 1张澍 1李帼昌1
作者信息
- 1. 沈阳建筑大学土木工程学院,辽宁沈阳 110168
- 折叠
摘要
目的 研究配筋空心钢管高强混凝土构件的抗弯性能,推动其在建筑结构中的应用.方法 采用有限元分析软件ABAQUS建立配筋空心钢管混凝土构件有限元模型,在验证模型准确的基础上,分析构件的受力全过程及钢材屈服强度、混凝土抗压强度、钢管壁厚、钢筋直径、普通钢筋数量对构件受弯性能的影响.结果 纯弯试件在荷载作用下受力过程可分为3个阶段:弹性阶段、弹塑性阶段和强化阶段;试件破坏形态均为受弯破坏,表现出较好地延性.结论 组合构件在弯矩作用下可以很好地协同工作;钢材屈服强度和钢管壁厚的增加对构件承载力的提高影响最显著,建议配置普通钢筋数量在6～8根为最优.
Abstract
Flexural properties of concrete elements with reinforced hollow steel tubes(RHHCFST)was studied to provide some reference for practical engineering.ABAQUS was used to build a finite element model of RHHCFST members,and test results were used to verify the accuracy of the model.Based on this,the whole process of loading and the influence of the yield strength of steel,compressive strength of concrete,wall thickness of steel tube,diameter of deformed bars and deformed bars number on the flexural behavior of the member are analyzed.Purely bending elements can be separated into 3 phases under load:the elastic phase,the elastoplastic phase and the strengthening phase.The specimens were all damaged by bending and showed fine ductility.Combined members can work well together under bending moments.Increasing the yield strength of the steel and the wall thickness of the steel tube has the most noticeable improvements in the load carrying capacity of the component.It is recommended to configure the number rebar roots in the range of 6 to 8 is optimal.
关键词
空心方钢管混凝土/高强混凝土/纯弯构件/分担荷载Key words
hollow concrete filled square steel tube/high strength concrete/pure bending member/load sharing引用本文复制引用
基金项目
国家自然科学基金(52178148)
国家自然科学基金(51808353)
辽宁省优秀青年基金(2021-YQ-10)
辽宁省教育厅面上项目(LJKZ0598)
出版年
2024
NETL
NSTL
万方数据