基于防屈曲支撑合理布置的单层球面网壳减震模式研究

发布时间：2018-01-11 02:24

本文关键词：基于防屈曲支撑合理布置的单层球面网壳减震模式研究　出处：《哈尔滨工业大学》2014年硕士论文　论文类型：学位论文

【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。
[Abstract]:Shell structure with its reasonable stress characteristics and beautiful structure in China has been more and more favored by designers. However, in recent years, the Wenchuan earthquake and Lushan earthquake, shell structure there are different degrees of damage, which indicates that it is necessary to study the damping shell structure seismic measures. Buckling support as a typical application of the theory of structural vibration control, can effectively reduce the damage of structures under earthquake. This article is in this context, the BRB frame structure as the lower shell structure of the supporting system of anti buckling support reasonable arrangement of influence on the seismic performance of the structure, obtain the damping reasonable model. The main research contents include: the establishment of a supporting system for: shell structure single frame beam, arranged in the lower supporting column of BRB, through Contrast response with and without BRB layout of the shell structure under the action of earthquake, we can see that with the increasing of BRB area, the response of the structure will appear four different characteristics, and it reflects the gradual transition rule. Based on the response of the main structure and summarize the BRB system changes of energy indicators, the BRB damping mechanism in the reticulated shell structure. And the extracted and reasonable failure mode corresponding to the BRB area reasonable range. Two: for the net shell structure the single frame beam supporting system, BRB layout system, shell span ratio, span, section the size of frame column, buckling support influence on seismic performance of anti seismic parameters such as the type of changes, to provide reference for the reasonable set of anti buckling support structure in the design process. Three: space reticulated shell framework for lower crossbeam supporting form is composed of two frame beam and the radial of the frame column in between the different ways of BRB layout, study the BRB damping mechanism in the structure. At the same time, considering the BRB layout, shell span ratio, span, buckling support effect on seismic the structure performance of the anti change columns and ground motion parameters. The BRB layout principle in this kind of structure.

【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU352.1;TU399

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