【作者】 李倩；

【导师】 徐虎； 蔡贵春；

【作者基本信息】 新疆大学 ， 结构工程， 2006， 硕士

【摘要】 曲箱梁是近年来在桥梁中用的很多的一种结构形式,耗钢少而重量轻,抗扭性好。但是在实际工程应用中,有许多具体问题需要进一步研究,例如,钢箱梁的横隔板的设计问题.由于曲梁的受力复杂,分析繁琐,并没有实际可行的计算方法确定横隔板的设置间距,在规范中对箱梁没有明确条文规定。实际工程设计中主要是依靠经验,所以横隔板的刚度、截面都比较大,耗材比较多,既浪费材料,也不一定合理。因此对横隔板进行系统全面的分析就显得尤为重要。本文利用ansys有限元分析程序,对指定断面,不同曲率的曲箱梁,建立完备的有限元模型,分别对二个方面的问题进行了分析:其一,通过对箱梁在有无跨中横隔板时截面顶板及腹板的变形和应力分布的对比分析,阐述了设置跨中横隔板的重要性;其二,在相同工况下,通过改变横隔板的设置间距,分析对箱梁翼缘及腹板的受力影响。在此基础上研究了横隔板的设置间距对曲箱梁在荷载作用下的翼缘和腹板的应力分布和变形规律,总结出横隔板的设置间距,通过本文分析得到最佳横隔板设置间距如下表:更多还原

【Abstract】 The curved thin-walled box- girder bridges have been widely applied in recent years. the box-girder has many advantages for example light weights and so on. But in practical projects , there are some problems ,for instance ,the design of diaphragms. as a result of the complicated analysis of the curved thin-walled box girder, there has little feasible methods to designs the diaphragm’s space between. There for the designs of diaphragms in the structures mostly depend on engineers’experience, then lead to the diaphragm’s stiffness and section are bigger, that make the waste of material too much and the design maybe not adv isible . so the systemic analysis of diaphragms is very important.This paper utilizes the international popular software - ANSYS and establishes more finite element analysis model of different curved thin-walled box-girder, to study two aspects of diaphragms. fist, to analyze and contrast stress and deformation of box–girder cross section and the beam web. to expiain the diaphragms’important. Second , change the diaphragm’s space between, retain the other thing, analyze the influence of the stress and deformation of box–girder cross section and the beam web. Based on the analysis upwards, the writer studied the rule of the influence of the stress and deformation box–girder cross section and the beam web with different diaphragm’s space between . According to the results of finite element analysis, the writer puts forward some suggestions which will provide some reference for the following design.we obtained the table of appropriate diaphragms’ distance:更多还原