钢筋再生混凝土T形柱轴心受压性能非线性数值分析  

Nonlinear numerical analysis of axial compression performance of reinforced recycled concrete T-column

作　　者：揭刚 袁建伟 熊永明 严成伟 陈卓异 Jie Gang;Yuan Jianwei;Xiong Yongming;Yan Chengwei;Chen Zhuoyi(College of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,Hunan;Jiangxi Transportation Institute,Nanchang 330200,Jiangxi;China Railway Bridge Science Research Institute Ltd.,Wuhan 430033,Hubei)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]江西省交通科学研究院,江西南昌330200 [3]中铁大桥局桥梁科学研究院有限公司,湖北武汉430033

出　　处：《工程建设》2020年第6期13-19,共7页Engineering Construction

基　　金：国家自然科学基金项目(51708047)。

摘　　要：异形柱结构被广泛应用于我国高层建筑结构中。为了探究钢筋再生混凝土T形柱轴心受压力学性能,材料本构关系的合理性选用至关重要。在再生混凝土单轴受压本构关系中,比较系统地考虑了再生粗骨料的影响;在普通混凝土约束本构关系中,比较全面地考虑到T形箍筋的约束效应;将再生混凝土单轴受压本构和普通混凝土约束指标两者结合起来,既考虑了再生混凝土的再生粗骨料取代率的影响,又考虑了T形箍筋约束作用的影响。基于拟合的再生混凝土约束本构,分别以再生粗骨料取代率、再生混凝土强度、体积配筋率、纵向钢筋配筋率、长细比等因素对轴心受压试件的力学性能影响进行分析。研究分析表明:随着再生粗骨料取代率的提高,峰值荷载降低;再生混凝土强度等级提高一个等级,峰值荷载提高约为8.12%~11.11%;配筋率提高,峰值荷载有不同程度的提高;长细比提高,峰值荷载降低约为0.62%~2.59%。The special-shaped column structure is widely used in high-rise building structures in China. In order to explore the compressive mechanical properties of T-column axis of the reinforced recycled concrete,the rational selection of material constitutive relations is crucial. In the uniaxial compressive constitutive relationship of recycled concrete,the effect of recycled coarse aggregate is considered systematically. In the constrained constitutive relationship of ordinary concrete,the restraining effect of T-shaped stirrups is considered more comprehensively,combining the axial compression constitutive with the ordinary concrete restraint index.In this way,not only the effect of the recycled coarse aggregate replacement rate of recycled concrete is considered,but also the effect of the T-shaped stirrup binding effect is considered at the same time. Based on the constitutive model of recycled concrete confinement,the influence of recycled coarse aggregate replacement ratio,recycled concrete strength,volume reinforcement ratio,longitudinal reinforcement ratio and slenderness ratio on the mechanical properties of axial compression specimens is analyzed. Research and analysis shows that,with the increase of the replacement rate of recycled coarse aggregate,the peak load is reduced;When the strength level of recycled concrete is increased by one level,the peak load is increased from 8.12% to 11.11%;When the reinforcement rate is increased,and the peak load is increased to varying degrees;the When the slenderness ratio is increased, the peak load is decreased from 0.62% to 2.59%.

关 键 词：钢筋再生混凝土T形柱 有限元分析 本构关系 力学性能分析 

分 类 号：TU375.3[建筑科学—结构工程]