钢筋混凝土刚架拱桥的内力分析模式与对比-市政工程专业论文.docxVIP

钢筋混凝土刚架拱桥的内力分析模式与对比摘 钢筋混凝土刚架拱桥的内力分析模式与对比 摘 要 钢筋混凝土刚架拱桥作为一种轻型桥型，由于其外形轻巧、结构美观、受 力合理，在我国七八十年代修建较多，是适用于软土地基的一种重要的桥型。 论文首先介绍了钢筋混凝土剐架拱桥的结构特点和受力特点，概述了刚架拱桥 的基本计算理论与分析方法，介绍了桥梁结构有限元程序，重点介绍了韩国的 MIDAS／Civil有限元分析软件及其在桥梁上的应用。论文以合肥市长丰路刚架 拱桥为工程实际背景，利用MIDAS／Civil有限元分析软件，分别分析了拱轴线 形、乎面分析法与空间分析法、新旧规范下的两种设计荷载等几种内力分析模 式对刚架拱桥的内力影响。通过以上分析，可以看出，刚架拱桥的拱轴线形对 其主要控制截面的内力没有什么影响；采用空间分析法与平面分析法对其内力 影响较大；新规范下刚架拱桥的内力与旧规范下也有较大的差距。论文最后介 绍了钢筋混凝土刚架拱桥的设计要点以及要重点设计的部位。论文结合工程实 例进行了分析和总结，具有一定的参考价值。 关键词： 刚架拱桥 拱轴线形 平面分析法 空间分析法 规范 Internal Internal Force Analytical Mode and Contrast of Rigid-frame Arch Bridge of Reinforced Concrete Abstract As kind oflight bridge type，because ofits shape agile，the stnlcture beauty，its reasollable stress condition，rigid．frame arch bridge ofreinforced concrete sets up more in the seven eigllt 10一year generations in our country．It is a kind ofimportant bridge type that is applicable to the SOR soil foundation．First。this Pa口er introduces the structure and stress characteristics ofrigid-frame arch bridge elminforeed concrete，cays the basic calculation theories and the analysis metheds ofarch bridge，introduces procedures ofthe bridge s咖cture．The point introduces an analysis ofMIDAS／Civil soRware ofKorea．ThiS paper with match the Changfeng mad Bridge ofHe Fei just an arch bridge for actual backgrollIld ofellgineering，makes USe oflimited dollar ofMIDAS，Ci访l analysis software， analyzes its internal forces affht to an arch bridge in the different of analytical mode about arch axis linetype，method ofplane analysis and method ofspace analysis，two design loads ofnew and old criterion．Above the analysis，We Can know that the arch axis linetype ofan arch bridge has no influence to the main contr01 sections in its internal forces；adopting the method of space analysis and the method ofplane allalysis influences greatly to its intemal forces；undernew criterion，theinternalforces ofarchbridgeare also greatlydifferentofthe old criterion’S．This paper introduces the design important point and t