配筋空心方钢管高强混凝土柱轴压本构关系和有限元建模方法研究

赵木子; 徐成彦; 龚超; 吴旭君; 侯兆新

doi:10.3724/j.gyjzG24020603

配筋空心方钢管高强混凝土柱轴压本构关系和有限元建模方法研究

doi: 10.3724/j.gyjzG24020603

1. 哈尔滨工业大学(深圳)材料科学与工程学院, 广东深圳 518055;
2. 中冶建筑研究总院(深圳)有限公司, 广东深圳 518055

基金项目:

五矿科创基金项目（JHCX20220011-YJY）。

详细信息

作者简介:
赵木子，博士，高级工程师，主要从事钢-混凝土组合结构的研究。

通讯作者:
龚超，gongchao6330@163.com。

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出版历程
- 收稿日期: 2024-02-06
- 网络出版日期: 2025-09-12

Material Constitutive Relationship and Finite Element Modelling Method for Reinforced Hollow Square High-Strength Concrete-Filled Steel Tubular Columns Under Axial Loading

1. School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China;
2. Central Research Institute of Building and Construction (Shenzhen) Co. Ltd., MCC Group, Shenzhen 518055, China

摘要

摘要: 现有研究对空心率、内置钢筋配筋率等参数对配筋空心方钢管高强混凝土柱轴压本构关系及有限元建模方法的影响考虑不足，且用于建立现有本构关系模型的钢管高强混凝土试验数据偏少，各模型所使用的数据间存在一定差异。为此，针对配筋空心方钢管高强混凝土柱轴压本构关系和有限元建模方法开展系列研究，在所搜集到的57组配筋空心方钢管高强混凝土与方钢管高强实心混凝土轴压性能试验数据基础上，通过理论推导与回归分析相结合的方法，建立了可靠的混凝土与钢材的本构关系模型，并提出了相应有限元建模方法。随后，采用搜集到的试验数据对所提模型的准确性进行了验证。结果表明：所提模型可较好地预测试件的轴压荷载-位移曲线；轴压承载力、峰值应变以及峰值后的残余承载力预测结果与相应试验结果之比的平均值分别为0.975、0.981、1.034，变异系数分别为0.088、0.205、0.179。
- 配筋空心方钢管高强混凝土 /
- 材料本构 /
- 有限元建模 /
- 轴压
Abstract: Parameters such as the hollow ratio and reinforcement ratio can significantly influence the behavior of reinforced hollow square high-strength concrete-filled steel tubular columns （RHSCFSTs）. However， current material constitutive models and finite element modeling methods fail to account for these effects. Besides， the data used for the modelling of concrete-filled steel tubes with high strength concrete is relatively small. The data adopted in existing models differs from each other. Therefore， this paper investigated the finite element modelling procedures for RHSCFST and the corresponding material constitutive models. Based on all collected test data from 57 groups of specimens， the reliable constitutive models for both concrete and steel were established through a combined approach of theoretical derivation and regression analysis. After then， the predicted results from the proposed models were compared with all the test data. The results showed that the proposed models could reasonably predict the axial load-deformation curve of RHSCFST members. The mean ratios of predicted-to-measured values for axial compressive capacity， peak strain， and post-peak residual capacity were 0.975， 0.981， and 1.034， respectively， with corresponding coefficients of variation of 0.088， 0.205， and 0.179.
- reinforced hollow square high-strength concrete-filled steel tube /
- material constitutive model /
- finite element modelling /
- axial load

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