【作者】 王力；

【导师】 范峰； 支旭东；

【作者基本信息】 哈尔滨工业大学 ， 结构工程， 2014， 硕士

【摘要】 网壳结构凭借其合理的受力特性和优美的结构造型在我国得到了越来越多设计者的青睐。然而在近年来发生的汶川地震和芦山地震中,网壳结构均出现了不同程度的破坏,这表明对网壳结构减震抗震措施的研究非常有必要。防屈曲支撑作为结构振动控制理论的一种典型应用,能够有效减小结构在地震作用下的损伤。本文正是在这样的背景下,将防屈曲支撑框架结构作为网壳结构的下部支承体系,研究防屈曲支撑的合理布置对结构的抗震性能的影响,获得合理的减震模式。主要研究内容包括:一:建立下部支承体系为单榀框架—圈梁的网壳结构,在下部支承柱间布置防屈曲支撑,通过与无防屈曲支撑布置的网壳结构地震作用下响应的对比,可以看出随着防屈曲支撑面积的不断增大,结构响应会出现四种不同的特点,且体现出逐渐过渡的规律。通过对主体结构响应以及防屈曲支撑系统耗能指标变化规律的总结,得到了防屈曲支撑在网壳结构中的减震机理。并且提取出与合理破坏模式相对应的防屈曲支撑面积的合理取值范围。二:针对上述单榀框架—圈梁体系支承的网壳结构,系统研究了防屈曲支撑布置方式、网壳矢跨比、网壳跨度、框架柱截面尺寸、地震动类型等参数变化时防屈曲支撑对结构抗震性能的影响,为结构设计过程中防屈曲支撑的合理设置提供参考。三:对于下部支承形式为由两榀框架—圈梁和径向的横梁构成的空间框架的网壳结构,在框架柱间进行了不同方式防屈曲支撑布置,研究了防屈曲支撑在结构中的减震机理。同时,考虑了防屈曲支撑布置方式、网壳矢跨比、网壳跨度、框架柱截面以及地震动等参数变化时防屈曲支撑对该类结构结构抗震性能的影响。提出防屈曲支撑在该类结构中的布置原则。更多还原

【Abstract】 In the upsurge of nationwide construction of large stadiums and exhibition halls, Layer spherical reticulated shells has found more and more favor in structure designer’ s eyes for its rational form and graceful figure. Our country lies in a territory with several earthquake hazards, so it’s necessary to study its seismic performance. As a typical application of theory of structural vibration control, buckling restrained brace(BRB) could reduce the damage of structures during earthquake. In this paper, I’ll introduce the BRB into the Layer spherical reticulated shells, and the buckling restrained braced frame will be considered as the substructure of the single-layer reticulated dome. This thesis mainly studies the content including:First, for the single-layer reticulated dome supported by substructure composed by single frame-ring beam system braced by BRB, compare the dynamic responses of structures with these without BRB. Find that there’ll be four typical features occur gradually during the increase of the area of the BRB. Summary the variation of seismic response of main structure and the energy index of BRB system, and then, the antiseismic mechanism of BRB is include. Also, the reasonable area of BRB is proposed.Second, for the single-layer reticulated dome supported by substructure composed by single frame-ring beam system braced by BRB, the arrangement of BRB in the substructure,the rise-span ratio of the dome, the span of the dome, the size of column in the substructure, type of earthquake on failure mechanism and anti-seismic properties are discussed. The result could be used as reference in the practical design.Third, change the form of substructure, the substructure in this part is composed by two frame-ring beam system and radial beams braced by BRB, compare the dynamic responses of structures with these without BRB. Summary the variation of seismic response of main structure and the energy index of BRB system. Find the anti-seismic mechanism of BRB and compare with that before the substructure is changed. Besides, discuss the influence of the arrangement of the BRB, the rise-span ratio of the dome, the span of the dome and the type of earthquake on failure mechanism and anti-seismic properties.更多还原