同球向双球面减隔震支座的设计研究

发布时间：2018-07-11 13:30

本文选题：交通工程 + 抗震设计　；参考：《河北科技大学》2014年硕士论文

【摘要】：近十年来,世界各地陆续发生了不同等级的地震灾害,如1994年美国北岭地震、1995年日本阪神地震、1997年美国圣费南多地震、1999年台湾集集地震、2008年汶川地震及2010年玉树地震等,均给当地的交通网络造成严重的破坏,导致生命财产的巨大损失。随着城市化的发展,交通网络在整个城市抗震防灾生命线系统中越来越重要。我国是一个地震多发的国家,目前正处于交通工程建设的高速发展时期,为寻求更加有效的抗震设计,尽量避免桥梁在地震中倒塌,地震工作者与结构工程师们不断地对桥梁结构抗震展开了大量的研究工作,各种各样的抗震设计方法在工程实践中付诸实施。其中,较普遍采用的方法是通过桥梁支座提供减隔震所需的位移量Δ来增加桥梁结构的延性,以延长桥梁结构的周期,隔离地面峰值加速度由墩、台传递给上部结构,达到降低地震力的目的,但偏心的位移量Δ由于作用在支座上的竖向荷载P使桥梁墩、台承受附加的偏心弯矩P·Δ的作用,即所谓P-Δ效应,位移量Δ大,则墩、台承受的水平力小,但附加的偏心弯矩则大,支座的尺寸和墩、台顶面的尺寸也相应增大,成本就相应增加。因此,迫切需要一种地震力和地震位移双重控制的减隔震支座,使桥梁的抗震更加安全、结构更加合理、同时造价更低。本文主要介绍了一种地震力和地震位移双重控制的新型减隔震桥梁支座的研制过程,包括其研制背景、研制的必要性及重要意义、结构设计原则、减隔震性能试验与分析、非线性动力响应分析、系列化设计原则、社会效益和经济效益分析、支座生产加工工艺及安装与养护等内容。
[Abstract]:In the past ten years, various kinds of earthquake disasters have occurred all over the world, such as the North Ridge earthquake in 1994, the Hanshin earthquake in Japan in 1995, the San Fernand earthquake in 1997, the Jiji earthquake in Taiwan in 1999, the Wenchuan earthquake in 2008 and the Yushu earthquake in 2010, etc. Both cause serious damage to the local transportation network and cause huge loss of life and property. With the development of urbanization, traffic network is becoming more and more important in the whole city seismic disaster prevention lifeline system. China is an earthquake-prone country and is currently in the period of rapid development of traffic engineering construction. In order to seek more effective seismic design and avoid bridges collapsing in the earthquake as far as possible, Seismologists and structural engineers have carried out a great deal of research on the earthquake resistance of bridge structure, and all kinds of seismic design methods have been put into practice in engineering practice. Among them, the more commonly used method is to increase the ductility of the bridge structure by providing the displacement 螖 needed by the bridge support for seismic isolation, so as to prolong the period of the bridge structure and isolate the peak acceleration of the ground from the pier and the platform to the superstructure. In order to reduce the seismic force, but the eccentric displacement 螖 makes the pier of the bridge bear the additional eccentric moment P 螖 because of the vertical load on the support, that is, the so-called P- 螖 effect, if the displacement 螖 is large, then the pier, The horizontal force of the platform is small, but the additional eccentric bending moment is larger, the size of the support and the pier and the size of the top surface of the abutment also increase accordingly, and the cost increases accordingly. Therefore, there is an urgent need for a double control of seismic force and displacement to reduce the earthquake isolation support, so as to make the bridge aseismic more secure, the structure more reasonable, and at the same time, the cost is lower. This paper mainly introduces the development process of a new type of isolation bridge bearing with double control of seismic force and displacement, including its research background, necessity and significance of development, structural design principle, test and analysis of isolation performance. Nonlinear dynamic response analysis, serial design principles, social and economic benefits analysis, support production and processing technology, installation and maintenance, and so on.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.36;U442.55

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