支承布置对混凝土曲线箱梁桥温度效应影响分析

发布时间：2018-03-07 01:27

本文选题：曲线梁桥　切入点：温度梯度　出处：《郑州大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着社会科技的飞速进步,我国的土木工程行业也得到突飞猛进的发展,桥梁的形式越来越多,曲线梁桥以其利于行车安全舒适、符合桥梁美学、节约工程造价和降低施工难度等优点被广泛采用。由于曲线梁桥在正常运营的过程中,会出现不同程度的损伤,且由于弯梁桥在构造方面存在“弯扭耦合”的作用,使得曲线梁桥受力复杂。由于温度作用对曲线梁桥的位移、支反力以及应力均有较大的影响;不同的支承体系的布置对曲线梁桥的性能影响也较大。但是,目前较多文献仅是研究温度作用对曲线梁桥的影响或者是支承方式对曲线梁桥性能的影响,关于支承体系对曲线梁桥温度效应的影响研究的文献较少,因此本文将两种因素结合起来,研究了不同的支承体系对曲线梁桥温度效应的影响,主要研究内容如下所示:(1)详细介绍了曲线梁桥的受力特点以及支承布置方式,并对曲线梁桥的温度作用进行详细的分析介绍;针对混凝土结构所受到的温度应力的理论进行讨论和分析。(2)利用有限元分析软件,建立曲线梁桥的有限元模型,分别模拟了在竖向温度梯度作用和均匀温度作用的作用下,研究分析了5种不同支承体系对曲线梁桥位移、支反力以及应力的影响变化。(3)分别探讨了在温度梯度作用下和在均匀温度作用下,对比分析了5种支承体系对曲线梁桥影响变化情况,在此基础上给出减轻温度效应的支承布置意见,希望可以为实际工程提供一定的参考基础。
[Abstract]:With the rapid progress of social science and technology, the civil engineering industry of our country has also been developed by leaps and bounds, the form of bridge is more and more, curved girder bridge is in favor of driving safety and comfort, in line with bridge aesthetics, The advantages of saving engineering cost and reducing construction difficulty are widely used. Due to the damage of curved girder bridge in normal operation, and because of the "bending and torsional coupling" function of curved beam bridge in structure, Because of the effect of temperature on the displacement, support reaction force and stress of curved girder bridge, the arrangement of different supporting system has great influence on the performance of curved beam bridge. At present, more literatures only study the effect of temperature on curved girder bridge or the effect of supporting mode on the performance of curved beam bridge, but there are few literatures on the effect of supporting system on temperature effect of curved girder bridge. Therefore, the influence of different supporting systems on the temperature effect of curved girder bridges is studied by combining the two factors. The main research contents are as follows: (1) the stress characteristics and supporting arrangement of curved girder bridges are introduced in detail. The temperature effect of curved girder bridge is analyzed in detail, and the theory of temperature stress of concrete structure is discussed and analyzed. 2) the finite element model of curved girder bridge is established by using finite element analysis software. Under the action of vertical temperature gradient and uniform temperature respectively, the displacement of curved girder bridge with five different supporting systems is studied and analyzed. The influence of supporting force and stress on the change of curved girder bridge is discussed in this paper, respectively, under the action of temperature gradient and under the action of uniform temperature, and the influence of five kinds of supporting systems on the curved girder bridge is compared and analyzed. On the basis of this, the support arrangement to mitigate the temperature effect is given, and it is hoped that it can provide a certain reference basis for the practical engineering.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U448.213;U441.5

【相似文献】