基于屈服线理论的钢管混凝土外加强环节点设计公式推导  

Design Fumula Derivation for Exterior Stiffener Ring Connection of Concrete Filled Steel Tube Based Yield-line Method

作　　者：李成玉[1] 高原[2] 周永 

机构地区：[1]武汉科技大学城市建设学院,武汉430070 [2]中冶南方工程技术有限公司,武汉430223 [3]中机三勘岩土工程有限公司,武汉430030

出　　处：《工程建设与设计》2012年第2期44-46,共3页Construction & Design for Engineering

基　　金：湖北省自然科学基金项目(2006ABA291)

摘　　要：外加强环式节点在钢管混凝土结构中广泛使用,国内规程或相关书籍中,都有这种节点的设计公式,不过所有这些书籍或者规程中均没有给出设计公式相关的推导过程。从试验和有限元模拟结果来看,加强环式节点达到屈服时在环面上会出现明显的屈服带,据此,基于屈服线理论,建立节点屈服机构,得到节点屈服强度,在引入调整系数后,进而提出节点环板宽度设计公式。本文提出的设计公式与现有设计公式在形式上一致,证明了现有设计公式的正确性;另外,经与有限元分析结果及已有设计公式对比分析,本文提出的设计公式有很高的精确度。The out stiffener ring connections are widely applied in Concrete Filled Steel Tubular （CFST） structure. There are design formulas in domestic regulations and corresponding books, but none of them give derivation process related to the design formulas, According to tests and finite element analyzing results, there will be obvious yield zone on the surface of the ring when stiffener ring joint comes to yield. Therefore, based on yield line theory, we set up joint yielding mechanism, got the yielding strength of the joint, introduced the adjustment coefficient, finally the width design formula of the joint ring plate was presented. The design formula this paper proposes is consistent in the form with the existing one, which proves the validity of the existing formula. In addition, after comparative analysis of finite element analyzing results and the existing design formula, the design formula this paper proposes has high accuracy.

关 键 词：钢管混凝土 屈服线理论 加强环节点 设计公式 

分 类 号：TU311[建筑科学—结构工程] TU528.59