桥梁减隔震设计计算方法研究

发布时间：2018-05-13 04:05

本文选题：隔震装置 + 隔震效果　；参考：《重庆交通大学》2015年硕士论文

【摘要】：非线性动力时程分析方法是桥梁减隔震设计计算分析的精确方法。但该分析方法较复杂和繁琐,计算工作量大,且需要分析人员具备一定的结构动力分析理论知识和经验。从而限制了该分析方法的广泛应用。近年来国内外研究人员对桥梁减隔震设计的简化分析方法开展了广泛的研究。本文在现有研究工作的基础上,特别是在消化吸收美国现行桥梁减隔震设计规范的简化计算方法的基础上,结合我国桥梁的具体情况,通过简化计算方法与精确的有限元计算分析结果的对比分析,对简化计算方法的精度和实用范围进行了研究,具体来讲,做了以下工作:①在文献资料阅读的基础上,对隔震桥梁的适用条件,常用减隔震装置以及隔震桥梁的分析计算方法做了归纳总结和阐述,对简化计算方法的计算流程以及墩柱和盖梁质量的不同处理方式进行了论述。②选择两座梁桥作为研究对象,其中一座为墩柱等高桥梁,另一座为墩柱不等高的桥梁,分别从考虑墩柱和盖梁调整系数的简化计算方法与多模态反应谱法以及非线性时程分析的对比研究,不考虑墩柱和盖梁调整系数的简化计算方法与多模态反应谱法以及非线性时程分析的对比研究,不考虑墩柱和盖梁质量的简化计算方法与多模态反应谱法以及非线性时程分析的对比研究,探讨了简化计算方法的计算精度和适用范围。③三种不同的简化方法计算复杂程度不同,考虑调整系数的方法需要计算复杂的调整系数,不考调整系数计算过程较考虑调整系数的计算过程方便,简单,更加容易操作。以三种不同的简化方法计算结果为迭代的起点,进行多模态反应谱分析,对比研究了多模态反应谱分析结果的一致性问题。④通过一座不等高斜梁桥计算实例,初步探讨了简化计算方法的适应性。⑤对我国桥梁类抗震设计规范的隔震设计计算提出了一些建议。
[Abstract]:Nonlinear dynamic time history analysis method is an accurate method for the design calculation and analysis of bridge seismic isolation. However, the analytical method is complex and cumbersome, and the calculation work is heavy, and it is necessary for the analysts to have some theoretical knowledge and experience in structural dynamic analysis. Therefore, the wide application of the analytical method is limited. In recent years, researchers at home and abroad have carried out extensive research on simplified analysis methods of bridge isolation design. On the basis of the existing research work, especially on the basis of digesting and absorbing the simplified calculation method of the American current design code for seismic isolation design of bridges, this paper combines the concrete situation of bridges in our country. By comparing and analyzing the results of simplified calculation method and accurate finite element analysis, the accuracy and practical scope of simplified calculation method are studied. Specifically, the following work: 1 is done on the basis of reading literature. The suitable conditions of the isolated bridge, the commonly used isolation device and the analysis and calculation method of the isolated bridge are summarized and expounded. In this paper, the calculation flow of simplified calculation method and different treatment methods of pier column and capping beam quality are discussed. 2 two beam bridges are selected as research objects, one of them is bridge of equal height of pier column and the other is bridge of unequal height of pier column. The comparison of simplified calculation method with multimodal response spectrum method and nonlinear time-history analysis considering the adjustment coefficient of pier column and capping beam is presented. The comparison between the simplified calculation method, multimodal response spectrum method and nonlinear time-history analysis, which does not take into account the adjustment coefficient of pier column and capping beam, is studied. The comparison between the simplified calculation method, multimodal response spectrum method and nonlinear time-history analysis, which does not consider the mass of pier column and capping beam, is studied. The calculation accuracy and application range of simplified calculation method are discussed. 3. 3 different simplified methods are used to calculate the complexity of calculation. The method considering the adjustment coefficient needs to calculate the complex adjustment coefficient. The calculation process of untested adjustment coefficient is more convenient, simpler and easier to operate than that of considering adjustment coefficient. Taking the results of three different simplified methods as the starting point of iteration, the multimodal response spectrum analysis is carried out, and the consistency problem of the results of multimodal response spectrum analysis is compared. The adaptability of the simplified calculation method is discussed preliminarily. 5. Some suggestions are put forward for the seismic isolation design calculation of the seismic design code for bridges in China.
【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】：U442.55

【参考文献】