钢管混凝土桁式拱桥计算模式研究

【作者】 张征文；

【导师】 黄平明；

【作者基本信息】 长安大学 ， 桥梁与隧道工程， 2001， 硕士

【摘要】 本文在国内外研究成果的基础上，利用能量法和最小势能原理导出了钢管混凝土结构的受箍机理和钢管、核心混凝土修正轴压弹性模量，进而修正了钢管混凝土修正轴压弹性模量并以此来计入钢管混凝土受压结构承载力的提高。在此基础上，本文着重提出了钢管混凝土桁式拱桥静力分析的一种简化计算模式——等代箱拱法，并联合传统计算模式（刚架计算模式和桁架计算模式）以实桥实测数据对比分析三种方法的优缺点，发现本文提出的简化计算模式计算结果真实可靠，且计算方法简便。此外，本文还对钢管混凝土桁式拱桥的温度内力进行了研究。更多还原

【Abstract】 On the basis of relative researches in the world, the hooping theory of CFST was deduced by use of energy principle and minimum potatial energy principle, moreover, use modified axial elastic modulus of steel tube and core concrete in order to reckon in the increase of CFST load-carrying capacity. Based on this, this paper put forwards a simplified calculate mode of the CFST truss arch bridge ? the isometric box-arch calculate method, and which was analyzed comparatively combined with the traditional calculate mode(rigid frame calculate mode and truss calculate mode ) by use of the real bridge data .As a result, we conclude that the method 梩he isometric box arch calculate method which brought forward in this paper in static analysis is veritable~ reliable and the means is simple. Otherwise, the temperature internal forces of the CFST truss arch bridge were also studied and deduced in this paper.更多还原