大跨度超高门式结构的地震响应分析
发布时间：2019-06-20 08:43
【摘要】：大跨度超高门式结构为一类特殊的结构形式，是指底部分开的两个或多个塔体在一定高度处通过连体将原来彼此独立的单体结构连为一体而组成的结构，既不同于普通的高耸结构，也不同于普通的大跨结构，是高耸结构与大跨度结构的组合体。该类结构受力复杂，其动力特性、破坏形式比普通的高耸结构和大跨度结构复杂得多。本文以实际工程为背景，对大跨度超高门式结构的动力特性、抗震设计方法、地震作用下的响应及行波效应对该类结构的影响进行研究。主要内容如下： 1、大跨度超高门式结构的动力特性及振型研究。采用简化模型，对大跨度超高门式结构进行理论分析，通过求解结构自由振动方程，得出该结构体系的基本振型；分析门式结构的振型参与系数，总结该体系与普通单塔结构体系振型参与系数的不同；总结大跨度超高门式结构的振型选取原则；对实际大跨度超高门式结构进行模态分析及振型分析，，并与理论分析结果比较。 2、大跨度超高门式结构的地震响应分析。对实际大跨度超高门式结构的三维模型分别采用振型分解反应谱法和弹性时程分析法进行地震响应分析，深入研究其在三向地震作用下的受力变形特点。 3、行波效应对大跨度超高门式结构的地震响应影响。由于实际大跨度超高门式结构跨度达150m，应考虑行波效应对结构的影响，对结构进行多遇地震下的多维多点分析。研究表明，多点激励与一致激励的结果相比，考虑行波效应使大跨度超高门式结构的响应发生很大的改变。因此，在对地震区大跨度超高门式结构进行设计分析时，需考虑行波效应对结构的影响，对结构进行合理的抗震分析。
[Abstract]:Long-span ultra-high gate structure is a kind of special structural form, which refers to the structure composed of two or more towers separated from each other at a certain height by connecting the original independent single structure at a certain height, which is different from the ordinary high-rise structure and the ordinary long-span structure, and is the combination of the high-rise structure and the long-span structure. The dynamic characteristics and failure forms of this kind of structure are much more complex than those of ordinary high-rise structure and long-span structure. Based on the background of practical engineering, the dynamic characteristics, seismic design method, response under earthquake and the influence of traveling wave effect on this kind of structure are studied in this paper. The main contents are as follows: 1. Study on dynamic characteristics and vibration modes of long-span ultra-high gate structure. The simplified model is used to analyze the long-span ultra-high gate structure theoretically, and the basic vibration mode of the structure system is obtained by solving the free vibration equation of the structure, the mode participation coefficient of the gate structure is analyzed, the difference of the vibration mode participation coefficient between the system and the ordinary single tower structure system is summarized, and the selection principle of the vibration mode of the long-span ultra-high gate structure is summarized. The modal analysis and vibration mode analysis of the actual long-span ultra-high gate structure are carried out, and the results are compared with the theoretical analysis results. 2. Seismic response analysis of long-span ultra-high gate structure. The three-dimensional model of the actual long-span ultra-high gate structure is analyzed by mode decomposition response spectrum method and elastic time history analysis method respectively, and the stress and deformation characteristics of the structure under the action of three-way earthquake are deeply studied. 3. The effect of traveling wave effect on the seismic response of long-span ultra-high gate structure. Since the span of the actual long-span ultra-high gate structure is 150 m, the influence of traveling wave effect on the structure should be considered, and the multi-dimensional and multi-point analysis of the structure under frequent earthquakes should be carried out. The results show that the response of long-span ultra-high gate structure is greatly changed by considering traveling wave effect compared with the result of uniform excitation. Therefore, in the design and analysis of long-span ultra-high gate structure in seismic area, the influence of traveling wave effect on the structure should be considered, and the reasonable seismic analysis of the structure should be carried out.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU311.3
[Abstract]:Long-span ultra-high gate structure is a kind of special structural form, which refers to the structure composed of two or more towers separated from each other at a certain height by connecting the original independent single structure at a certain height, which is different from the ordinary high-rise structure and the ordinary long-span structure, and is the combination of the high-rise structure and the long-span structure. The dynamic characteristics and failure forms of this kind of structure are much more complex than those of ordinary high-rise structure and long-span structure. Based on the background of practical engineering, the dynamic characteristics, seismic design method, response under earthquake and the influence of traveling wave effect on this kind of structure are studied in this paper. The main contents are as follows: 1. Study on dynamic characteristics and vibration modes of long-span ultra-high gate structure. The simplified model is used to analyze the long-span ultra-high gate structure theoretically, and the basic vibration mode of the structure system is obtained by solving the free vibration equation of the structure, the mode participation coefficient of the gate structure is analyzed, the difference of the vibration mode participation coefficient between the system and the ordinary single tower structure system is summarized, and the selection principle of the vibration mode of the long-span ultra-high gate structure is summarized. The modal analysis and vibration mode analysis of the actual long-span ultra-high gate structure are carried out, and the results are compared with the theoretical analysis results. 2. Seismic response analysis of long-span ultra-high gate structure. The three-dimensional model of the actual long-span ultra-high gate structure is analyzed by mode decomposition response spectrum method and elastic time history analysis method respectively, and the stress and deformation characteristics of the structure under the action of three-way earthquake are deeply studied. 3. The effect of traveling wave effect on the seismic response of long-span ultra-high gate structure. Since the span of the actual long-span ultra-high gate structure is 150 m, the influence of traveling wave effect on the structure should be considered, and the multi-dimensional and multi-point analysis of the structure under frequent earthquakes should be carried out. The results show that the response of long-span ultra-high gate structure is greatly changed by considering traveling wave effect compared with the result of uniform excitation. Therefore, in the design and analysis of long-span ultra-high gate structure in seismic area, the influence of traveling wave effect on the structure should be considered, and the reasonable seismic analysis of the structure should be carried out.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU311.3
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