大跨度钢筋混凝土拱式渡槽动力特性及地震响应分析

发布时间：2018-03-03 20:33

本文选题：钢筋混凝土拱式渡槽　切入点：反应谱分析　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：钢筋混凝土拱式渡槽在水利输水工程中的运用越来越多,但是拱式渡槽抗震设计时仍然是参照公路桥梁的相关抗震设计规范。关于钢筋混凝土拱式渡槽的地震特性的研究不多,对于拱式渡槽主拱圈的动力弹塑性研究国内更少见。因此,对于钢筋混凝土拱式渡槽在地震作用下的动力特性以及地震响应规律的研究显得非常重要。本文主要对钢筋混凝土拱式渡槽做了以下研究工作:①结合祠堂边渡槽的工程实例,利用有限元分析软件Midas/Civil建立其空间动力分析模型,对比分析了钢筋混凝土拱式渡槽在有水工况下和无水工况下的动力特性的区别。②运用反应谱法分析了拱式渡槽主拱圈的内力、位移地震响应规律以及渡槽在有水工况下和无水工况下的地震响应规律对比。同时运用线性时程分析法,对渡槽进行动力时程分析。将反应谱法的结果与线性时程分析法的结果进行对比分析。③考虑行波效应时对大跨度钢筋混凝土拱式渡槽进行地震响应分析,主要通过比对不同的剪切波速情况下,顺渡槽向输入地震波,对比分析不考虑行波效应与考虑行波效应时,钢筋混凝土拱式渡槽的地震响应规律的差异性。④用纤维单元对主拱圈进行划分模拟,其他结构部位仍用弹性梁单元模拟,得到基于纤维梁单元的动力弹塑性分析模型。对主拱圈进行了动力弹塑性分析,得出其动力弹塑性的地震响应规律。
[Abstract]:Reinforced concrete arch aqueduct is used more and more in water conservancy engineering, but the seismic design of arch aqueduct is still referred to the relevant seismic design code of highway bridge. There are few researches on seismic characteristics of reinforced concrete arch aqueduct. The dynamic elastic-plastic study of the main arch ring of the arch aqueduct is more rare in China. It is very important to study the dynamic characteristics and seismic response of reinforced concrete arch aqueduct under earthquake. In this paper, the following research work has been done on reinforced concrete arch aqueduct: 1 combined with an engineering example of ancestral temple side aqueduct. The spatial dynamic analysis model of reinforced concrete arch aqueduct is established by using the finite element analysis software Midas/Civil. The difference between the dynamic characteristics of reinforced concrete arch aqueduct under the condition of water and that of no water is analyzed. 2 the internal force of the main arch ring of the arch aqueduct is analyzed by using the response spectrum method. The displacement seismic response law and the seismic response law of aqueduct under water and anhydrous conditions are compared. The linear time history analysis method is also used. The dynamic time history analysis of aqueduct is carried out. The results of response spectrum method and linear time history analysis are compared. 3. The seismic response of long span reinforced concrete arch aqueduct considering traveling wave effect is analyzed. Mainly by comparing the different shear wave velocities, the seismic wave is input along the aqueduct. When the traveling wave effect is not considered and the traveling wave effect is considered, Difference of Seismic response Law of reinforced concrete Arch Aqueduct .4 the main arch ring is divided and simulated by fiber element, and other structural parts are still simulated by elastic beam element. The dynamic elastic-plastic analysis model based on fiber beam element is obtained. The dynamic elastic-plastic analysis of the main arch ring is carried out, and the seismic response law of the main arch ring is obtained.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TV672.3;TV312

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