摘要
在钢管混凝土叠合柱中,钢管混凝土部分与管外钢筋混凝土部分之间的双重约束显著地影响了叠合柱的轴压性能,传统钢管混凝土本构和钢筋混凝土本构难以对叠合柱的力学行为进行较好的模拟。对此考虑叠合柱中的双重约束效应,建立了叠合柱增量迭代应力应变模型,对叠合柱的轴压性能进行分析。模型基于新的反映双重约束的叠合柱横向应变模型,可以考虑双重约束的计算程序。将叠合柱增量迭代应力应变模型的计算结果与试验结果进行比较,发现该模型能较好地反映叠合柱的轴压性能,验证了该模型的合理性、有效性,适用于实际工程对桥墩的设计。
In a steel tube-reinforced concrete column(ST-RC),the secondary confinement between CFST core and peripheral RC encasement alters the compressive performance.The conventional constitutive models proposed for CFST and RC columns are therefore not applicable to ST-RC columns.Considering the secondary confinement,a well-defined incremental iterative model was established to analyze the structural performance of axially loaded ST-RC columns.A new lateral strain equation considering secondary confinement,and an iterative process,was developed.By comparing with the results of test,it is found that the proposed model can perfectly reflect the structural compressive performance of ST-RC columns.As a result,the reasonability,effectiveness and applicability of this incremental iterative model have been verified.
作者
黄远
陆华森
HUANG Yuan;LU Huasen(Hunan Provincial Key Laboratory on Damage Diagnosis for Engineering Structures,Hunan University,Changsha,Hunan 410082,China;College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China)
出处
《公路工程》
2023年第2期136-142,共7页
Highway Engineering
基金
国家自然科学基金项目(51890901)
湖南省自然科学基金项目(2020JJ2003)。
关键词
钢管混凝土叠合柱
增量迭代模型
轴压性能
双重约束
steel tube-reinforced concrete column
incremental iterative model
compressive performance
secondary confinement
