钢管复合骨料混凝土轴压短柱承载能力  

Axial Compressive Bearing Capacity of Hybrid Aggregate Concrete Filled Steel Tubes

作　　者：赵福超 马坤 蔡少熳 韩冰[3] 向天宇 ZHAO Fu-chao;MA Kun;CAI Shao-man;HAN Bing;XIANG Tian-yu(School of Civil Engineering,Architecture and Environmental Engineering,Xihua University,Chengdu 610039,China;Guizhou Transportation Planning Survey&Design Academe Co Ltd,Guiyang 550025,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]西华大学土木建筑与环境学院,四川成都610039 [2]贵州省交通规划勘察设计研究院,贵州贵阳550025 [3]北京交通大学土木工程学院,北京100044

出　　处：《土木工程与管理学报》2018年第6期215-219,共5页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51678030);贵州省交通运输厅资助项目(2015-123-041);四川省省属高校科研创新团队资助项目(16TD0018)

摘　　要：以轻骨料体积取代率与钢管壁厚为主要试验研究参数,进行了钢管复合骨料混凝土短柱轴压试验。结合复合骨料混凝土在单轴受压下的泊松效应研究结果,分析了轻骨料取代率对钢管混凝土短柱轴压承载能力的影响。结果表明,钢管复合骨料混凝土的轴压承载能力受到复合骨料混凝土轴压强度以及泊松效应两方面因素的耦合影响。在合理的轻骨料取代率下,钢管复合骨料混凝土的轴压承载能力将不低于普通钢管混凝土。采用轻骨料取代率为基本变量,提出了钢管复合骨料混凝土轴压短柱承载能力计算公式,结果表明计算结果与实验值吻合良好。Experimental researches on behaviors of hybrid aggregate concrete filled steel tube(HACFT)under axial compression are performed,in which such parameters as the volume content of lightweight aggregate(LWA)and the thickness of steel tube are involved.Through combining the study results of Poisson effect of lightweight aggregate concrete,the influence of LWA volume fraction on bearing capacity of HACFT columns is investigated.The results show that the bearing capacity of HACFT columns is influenced by the coupled effects of the compressive strength and Poisson ratio.With a rational LWA volume fraction,it has been found that the bearing capacity of HACFT columns is not lower than that of common concrete filled steel tube.Using the volume fraction of LWA as the variable,a predictive formula for the axial compressive bearing capacity of HACFT was proposed,and the calculated results agree well with the experimental ones.

关 键 词：钢管混凝土 复合骨料混凝土 泊松效应 轴压承载力 

分 类 号：TU375.3[建筑科学—结构工程]