纤维模型法计算矩形中空钢管混凝土受弯承载力  

Flexural Capacity of Concrete-Filled Double-Shin Steel Tubes Based on Fiber Model

作　　者：林晓东[1,2] 谢兆平[2] 郑炜 林宇 LIN Xiaodong;XIE Zhaoping;ZHENG Wei;LIN Yu(College of Civil Engineering, Huaqiao University, Xiamen Fujian 361021, China;School of Civil Engineering, Putian University, Putian Fujian 351100, China;Fujian Ju'an Construction Engineering Co. , Ltd. , Putain Fujian 351100, China)

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]莆田学院土木工程学院,福建莆田351100 [3]福建巨岸建设工程有限公司,福建莆田351100

出　　处：《莆田学院学报》2017年第2期77-82,共6页Journal of putian University

基　　金：福建省教育厅基金资助项目(JA13285)

摘　　要：采用简便的分析方法——纤维模型法分析矩形中空钢管混凝土的受弯性能,借鉴钢管混凝土结构构件的基本假定及材料本构关系,分析其正截面受弯承载力,并编制了荷载-位移关系曲线的计算程序。利用该程序分析了两个算例,同时,讨论了空心率、混凝土强度、截面宽厚比及高宽比对受弯承载力的影响。结果表明,中空钢管混凝土构件具有更高的承载力,受弯承载力随空心率、混凝土强度的提高而提高,随截面宽厚比及高宽比的增大而减小。采用纤维模型的计算结果与实验结果吻合良好,验证了该方法的有效性。A simplified calculating method,fiber model method,was put forward for flexural capacity of concretefilleddouble-shin(rhs inner and rhs outer)steel tubes(CFDST).By using the basic assumption of the concrete-filledtube(CFT)structural elements and the constitutive relation of the material,this paper analyzed the flexural capacityof the normal section.The fiber model method was utilized.The procedure of load-deformation relationship curveswas composed.The difference of the calculated results and experimental results was compared by two samples.This procedure analyzed the influences of parameters that include hollow section ratio,strength of the concrete,depth-width ratio,width-thickness ratio.The study showed that the flexural capacity of CFDST is higher thanCFT members of the equal conduction.Increasing the hollow section ratio or increasing the strength of concretecan increase the flexural strength.Improving the depth-width ratio or improving the width-to-thickness ratio candecrease the flexural strength.Results of fiber model method conforms to the experimental results,which verifythe efficiency of the method.

关 键 词：钢管混凝土 中空截面 纤维模型 受弯承载力 

分 类 号：TU398[建筑科学—结构工程]