【作者】 王廷彦；

【导师】 邓雪松； 陈麟；

【作者基本信息】 广州大学 ， 防灾减灾工程及防护工程， 2006， 硕士

【摘要】 本文总结了巨型结构体系的研究与应用现状，吸取巨型桁架结构体系和巨型框架结构体系的优点，提出了巨型框架-支撑结构体系，并对其静力性能、动力特性和地震反应进行了分析研究。为了改善巨型框架-支撑结构的抗震性能，结合当今耗能减震技术的发展，进一步提出巨型框架-耗能支撑结构新体系，并对该新体系在罕遇地震作用下的减震性能进行了分析研究。本文的主要研究内容和结果如下： 1．对巨型框架-支撑结构和巨型框架结构进行静力性能分析，研究了两种结构在竖向荷载、风荷载以及两种荷载共同作用下的传力机理、内力特征和变形特点，同时比较了两种结构的内力、变形、效率和经济性等指标。结果表明：巨型框架-支撑结构的静力性能优于巨型框架结构。 2．对巨型框架-支撑结构和巨型框架结构的动力特性和地震反应进行了分析研究。首先对巨型框架-支撑结构和巨型柜架结构的自振特性进行了分析和比较，接着分别采用振型分解反应谱法、弹(塑)性时程分析法对两种结构在常遇地震和罕遇地震作用下的地震反应进行了分析和比较。结果表明：巨型框架-支撑结构比巨型框架结构具有较好的动力性能。 3．对巨型框架-耗能支撑结构新体系进行了罕遇地震作用下的弹塑性时程分析，研究了该体系的减震性能和耗能支撑的不同布置方式对结构的减震效果。结果表明：如果耗能支撑布置位置得当，可以用较少的耗能支撑个数达到较好的减震效果；巨型框架-耗能支撑结构不但可以减少原巨型框架-支撑结构的层间侧移，还可以减少其底部剪力和顶层加速度反应的峰值。更多还原

【Abstract】 This paper summarizes the state of the art of researches and applications of mega structural system. By combining the advantages of both mega frame and mega truss structure, mega frame-brace structural system is proposed and the static performance, dynamic properties and earthquake response of the structural system are studied. In order to improve the seismic performance of the mega frame-brace structural system, a new system of mega frame-brace structure with Energy Dissipator is also presented. Dynamic behavior of this new structural system under severe earthquake action is also analyzed. The main work and important achievements of this paper are as follows:The static performance of both mega frame-brace structure and mega frame structure is discussed. The internal force, displacement and load-transform mechanics of structures induced by the vertical load, the wind load and the two loads are studied. Results indicate that mega frame-brace structure has preferable static behavior.The dynamic behavior and earthquake response of both mega frame-brace structure and mega frame structure are also analyzed. In the first place, vibration characteristics of the two structures are studied. Furthmore, the earthquake response of two structures is analyzed and compared utilizing response spectrum analysis and elastice/elastic-plastic time history analysis respectively. Studies show that mega frame-brace structure possesses superior dynamic properties.The dynamic behavior of mega frame-brace structure with Energy Dissipator under severe earthquake action is anaylized utilizing elastic-plastic time history analysis. The influence of various layout fashion of unbonded braces is also studied. Results indicate that if unbonded braces are installed in suitable locations of structures, it can acquire better dynamic behavior by means of minority unbonded braces, and the unbonded brace not only can reduce the lateral displacement, but also diminish the maximum base shear and peak acceleration at the top of structures.更多还原