配筋空心方钢管高强混凝土偏压短柱有限元分析  

Finite Element Analysis of Reinforced Hollow High Concrete Filled Square Steel Tubular Stub Columns under Eccentric Compression

作　　者：杨志坚[1] 彭书存 李帼昌[1] 丛晓磊 YANG Zhijian;PENG Shucun;LI Guochang;CONG Xiaolei(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;The Fourth Construction Engineering Co.Ltd.,China Construction Second Engineering Bureall,Tianjin,China,300457)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]中建二局第四建筑工程有限公司,天津300457

出　　处：《沈阳建筑大学学报（自然科学版）》2022年第4期655-663,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51808353,52178148);辽宁省优秀青年基金项目(2021-YQ-10)。

摘　　要：目的研究配筋空心方钢管高强混凝土偏压短柱受力性能及延性性能,为配筋空心方钢管混凝土组合柱试验研究提供参考依据。方法利用有限元软件ABAQUS建立了22个配筋空心方钢管高强混凝土偏压短柱模型,对构件的受力全过程及钢材屈服强度、混凝土强度、偏心距和含钢率等参数对其受力性能的影响进行分析。结果配筋空心方钢管高强混凝土偏压短柱受力过程分为弹性阶段、弹塑性阶段、塑性强化阶段、下降阶段。增大钢材强度和含钢率可以使构件的承载力显著提升,延性也越好;提高混凝土抗压强度,构件的承载力增加但延性变差;配普通钢筋可以增加构件的承载力且改善构件的延性。结论配筋空心方钢管高强混凝土偏压短柱充分发挥了各材料的受力特点,在减轻自重的条件下承载力较高且延性较好。This article aims to investigate the mechanical performance and ductility of reinforced concrete-filled hollow square steel tubular stub columns under eccentric compression,which will provide reference for the experimental study of reinforced hollow high concrete filled square steel tubular(RHHCFST)composite columns.The finite element software ABAQUS was used to establish 22 eccentrically loaded reinforced high-strength concrete-filled hollow square steel tubular stub column models,and the whole loading process of the column and the effects of the steel yield strength,concrete strength,eccentricity and steel ratio on its mechanical performance are analyzed Results showed that the loading process of RHHCFST under eccentric load can be categorized into elastic stage,elastoplastic stage,plastic strengthening stage,and descending stage.Both the load-bearing capacity and the ductility of the column increase with steel yield strength,steel ratio,and when using the conventional reinforcement.Meanwhile,enhancing the concrete strength increases the load-bearing capacity while decreases the ductility.In summary the RHHCFST under eccentric compression can fully exert the advantageous mechanical characteristics of each material,and the column behaves a high bearing capacity,a good ductility,and a low weight in engineering practice.

关 键 词：空心方钢管高强混凝土 偏压短柱 管柱 偏心距 含钢率 

分 类 号：TU391[建筑科学—结构工程]