摘要
为探究圆端形椭圆钢管混凝土构件的受扭性能和抗扭承载力计算方法,采用ABAQUS建立了圆端形椭圆钢管混凝土构件在纯扭作用下的有限元分析模型。为解决核心混凝土本构关系问题,提出了一种关于圆端形椭圆钢管核心混凝土本构关系的新等效方法,利用已有试验结果验证了等效方法的可行性和数值分析模型的准确性。开展了纯扭作用下圆端形椭圆钢管混凝土构件性能的参数分析,研究参数包括钢材强度、混凝土强度、含钢率、长短轴比和截面尺寸等。揭示了圆端形椭圆钢管混凝土构件在纯扭作用下的受力机理,提出了圆端形椭圆钢管混凝土构件的抗扭承载力简化计算公式。结果表明:构件抗扭承载力随钢材强度、截面尺寸、含钢率增大而增大,随长短轴比增大而减小;研究成果将为圆端形椭圆钢管混凝土构件的设计提供参考。
In order to explore the calculation method of torsional behavior and torsion bearing capacity of circular-end elliptical concrete-filled steel tube members,the finite element analysis model of circular-end elliptical concrete-filled steel tube members under pure torsion was established by using ABAQUS.In order to solve the constitutive relation of core concrete,a new equivalent method for the constitutive relationship of circular-end elliptical steel tube core concrete was presented.The feasibility of the equivalent method and the accuracy of the numerical analysis model were verified by the existing experimental results.The parameter analysis on the performance of circular-end elliptical concrete-filled steel tube members subjected to pure torsion was carried out.The research parameters included steel strength,concrete strength,steel ratio,long-short axis ratio and section area.The force mechanism of circular-end elliptical concrete-filled steel tube members under pure torsion was revealed.A simplified formulafor calculating torsion bearing capacity of circular-end elliptical concrete-filled steel tube members was presented.The research results show that the torsion bearing capacity of members increases with the increase of steel strength,section area and steel ratio,and decreases with the increase of long-short axis ratio.The research results will provide a reference for the design of the circularend elliptical concrete-filled steel tube members.
作者
王静峰
於忠华
沈奇罕
江汉
WANG Jing-feng;YU Zhong-hua;SHEN Qi-han;JIANG Han(School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, Anhui, China;Anhui Key Laboratory of Civil Engineering Structures and Materials, Hefei University of Technology, Hefei 230009, Anhui, China)
出处
《建筑科学与工程学报》
CAS
北大核心
2018年第3期7-15,共9页
Journal of Architecture and Civil Engineering
基金
国家自然科学基金项目(51478158
51178156)
教育部新世纪优秀人才支持计划项目(NCET-12-0838)
关键词
圆端形椭圆钢管混凝土
受扭性能
有限元分析
受力机理
抗扭承载力
circular-end elliptical concrete filled steel tube
torsional behavior
finite elementanalysis
force mechanism
torsion bearing capacity
