【作者】 李志鹏；

【导师】 吴斌；

【作者基本信息】 哈尔滨工业大学 ， 结构工程， 2009， 硕士

【摘要】 由于地震作用的不确定性,建筑结构经常会遭遇超过其设防烈度的强烈地震作用,使得结构的破坏非常严重。隔震结构通过设置隔震层能够吸收并消耗地震能量,减小了上部结构的地震反应。但是由于隔震层的刚度较小,极震作用下隔震层的变形会很大,当隔震层的变形超过一定范围以后,就会引发隔震结构的破坏,与传统结构相比这又是隔震结构的缺点所在。针对这一问题,研究隔震结构的倒塌破坏机理可以帮助我们预测结构的抗倒塌能力和结构倒塌的全过程,具有十分重要的意义。本文主要通过算例对比,分析了隔震与非隔震砌体结构极震下抵抗倒塌的能力。主要研究内容如下:1.考虑砌体结构的滞回特性,隔震支座的滞回特性及其橡胶硬化特性数值模拟,编写了隔震砌体结构的地震反应分析程序。2.分析在强烈地震作用下隔震支座极限性能对隔震结构产生的影响,确定结构最终的破坏模式及抗倒塌性能,并与非隔震砌体结构的抗倒塌能力进行对比。3.研究隔震层的碰撞作用对上部砌体结构产生的影响,分析隔震结构的破坏模式及抗倒塌性能,并与非隔震砌体结构的抗倒塌能力进行对比。更多还原

【Abstract】 Due to the uncertainty of seismic action, structures are damaged seriously under strong earthquake exceeding its design level. By incorporating isolated layer ,which can absorb and dissipate seismic energy,the response of the upper structure is reduced. However, the deformation of the isolated layer is so large under an extreme earthquake due to the small stiffness of isolation layer that the isolated will fail when the deformation exceeds certain range. Compared with the traditional structure, this is the shortcoming of isolated structures. In this paper the collapse resistant behavior of based-isolated structures is investigated, which will help us predict the collapse of the structures and their anti-collapse capacity.The seismic performance of the isolated and non-isolated masonry structures under the extreme earthquake are compared through case study. The main contents are summarized as follows:(1) A nonlinear seismic analysis program is compiled,in which the hysteretic behavior of the masonry structures and rubber bearings are considered.(2) The influence of the limit performance of the bearings on the based-isolated structure is analyzed. The ultimate failure mode is determined, in which the anti-collapse capacity of isolated masonry structures are compared with that of the non- isolated masonry structures.(3) The impact of the base-isolated layer collision on masonry structures is analyzed. The ultimate failure mode is determined, in which the anti-collapse capacity of isolated masonry structures is also compared with that of the non- isolated masonry structures.更多还原