基于基础隔震的钢—混凝土混合结构力学性能研究

发布时间：2019-06-22 16:06

【摘要】：我国作为一个地震多发的国家,每次地震所带来的人员伤亡及财产损失都十分巨大。传统的应对措施是通过加大结构的配筋,以结构自我损坏来消耗地震能量,这样不仅会加大建造成本,同时会带来更大的损失。而随着我国经济的快速发展,人们的生活水平不断地提高,随之带来了土地资源紧缺的问题,使得建筑物越来越高,结构形式也向着多样化发展,钢—混凝土混合建筑结构就是主流的一种。这样一来,一旦遇到大地震,采用传统抗震设计将会给人民带来更大的损失。虽然近年来各国学者提出了隔震体系的理论并做了大量的研究,但是对于现在比较流行的钢—混凝土混合建筑结构还处于抗震研究阶段,对其隔震方面的研究很少,实验也不多。因此将基础隔震技术应用到钢—混凝土混合建筑结构,研究其在地震作用下的隔震效果具有十分重要的理论与社会意义。本文设计制作了一钢—混凝土混合结构模型,将铅芯橡胶隔震支座应用到此结构中,并对模型进行了振动台试验和有限元分析。主要研究内容如下:(1)对目前基础隔震技术及钢—混凝土混合结构的研究现状进行分析概述,研究铅芯隔震支座的力学性能。(2)建立基础隔震的单质点计算模型、双质点计算模型及多质点计算模型,并推导其动力微分方程。(3)设计制作一钢—混凝土混合结构模型,分别对普通抗震结构和基础隔震结构进行振动台模拟地震试验。通过试验测出两种结构在两种天然波、一种人工波及两种加速度下的地震响应。根据试验数据,对比分析两种结构的加速度响应、位移响应及楼层柱底最大剪力响应,并将试验结果与双质点计算模型求解得到的柱底剪力理论值进行对比分析。(4)通过有限元软件SAP2000建立钢—混凝土混合结构的数值分析模型,进行时程分析,并与试验结构进行对比研究。
[Abstract]:As a country with frequent earthquakes, the casualties and property losses caused by each earthquake are very great. The traditional response is to consume seismic energy by increasing the reinforcement of the structure and self-damage of the structure, which will not only increase the construction cost, but also bring greater losses. With the rapid development of economy in our country, people's living standards continue to improve, which brings about the shortage of land resources, which makes the buildings higher and higher, and the structural forms are also developing towards diversification. Steel-concrete hybrid building structure is one of the mainstream. In this way, once a large earthquake is encountered, the use of traditional seismic design will bring greater losses to the people. In recent years, scholars from all over the world have put forward the theory of isolation system and done a lot of research, but the popular steel-concrete mixed building structure is still in the seismic research stage, and the research on isolation is very few, and there are not many experiments. Therefore, it is of great theoretical and social significance to apply the base isolation technology to the steel-concrete mixed building structure and study its isolation effect under the earthquake. In this paper, a steel-concrete mixed structure model is designed and made, and the lead rubber isolation bearing is applied to the structure, and the shaking table test and finite element analysis of the model are carried out. The main research contents are as follows: (1) the current research status of base isolation technology and steel-concrete hybrid structure is analyzed and summarized, and the mechanical properties of lead isolation bearing are studied. (2) the single particle calculation model, double particle calculation model and multi-particle calculation model of base isolation are established, and their dynamic differential equations are derived. (3) A steel-concrete hybrid structure model is designed and made. The shaking table simulation seismic tests of ordinary seismic structures and base-isolated structures are carried out respectively. The seismic responses of two kinds of structures under two kinds of natural waves, one kind of artificial acceleration and two kinds of acceleration are measured by experiments. According to the test data, the acceleration response, displacement response and the maximum shear response of the floor column bottom of the two structures are compared and analyzed, and the experimental results are compared with the theoretical values of the shear force at the bottom of the column obtained by the double particle calculation model. (4) the numerical analysis model of the steel-concrete hybrid structure is established by the finite element software SAP2000, and the time history analysis is carried out, and the results are compared with the experimental structure.
【学位授予单位】：中南林业科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9;TU352.12

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