基础隔震结构性能化设计指标研究

发布时间：2018-05-26 02:42

本文选题：基础隔震 + 性能化设计　；参考：《华中科技大学》2015年硕士论文

【摘要】：基础隔震技术近几十年迅速发展的结构控制技术,基于此技术的建筑具有十分优良的抗震性能,其应用也越来越广泛。基于性能的抗震设计是近20年提出的新型结构抗震设计方法,提高了生命及财产安全的保障程度,成为抗震设计方法的发展趋势。基础隔震结构基于性能的抗震设计正是将基于性能设计思想应用于基础隔震结构的一种设计理论。许多学者针对非隔震结构性能做了一系列研究,性能指标多取为位移、位移角、能量等,对于基础隔震结构相应研究很少也不全面。本文针对基础隔震建筑,提出了一套设防水准与性能目标,给出了性能指标的量化参数及量化值,具体内容如下:一、根据基础隔震建筑的特点及应用范围,考虑使用功能、社会功能,以设计基准期为基础将基础隔震建筑按重要性分为甲、乙、丙三类,设计基准期分别为200年、100年、50年;二、提出了基础隔震建筑的设防水准表达式,并进行了设防水准的划分,4个水准在设计基准期内超越概率分别为63%、10%、5%、2%;三、将基础隔震结构性能水平设为四个:充分运行、可以使用、生命安全、接近倒塌,设防目标取为常遇地震充分运行,偶遇地震可以使用,罕遇地震保证生命安全,极罕遇地震防止倒塌;四、综合分析得到了基础隔震结构性能水平的隔震层位移、层间位移角、楼层加速度三个性能化指标,并从理论上给出了隔震层位移与层间位移角量化值,楼层加速度指标则是通过理论与振动台试验分析得出。
[Abstract]:The structure control technology based on the foundation isolation technology has developed rapidly in recent decades. The building based on this technology has excellent seismic performance and its application is more and more extensive. Performance-based seismic design is a new seismic design method for structures proposed in recent 20 years. It improves the security of life and property and becomes the development trend of aseismic design methods. The performance-based seismic design of base-isolated structures is a kind of design theory which applies performance-based design to base-isolated structures. Many scholars have done a series of studies on the performance of non-isolated structures. The performance indexes are displacement, displacement angle, energy and so on. This paper puts forward a set of fortification level and performance target for base-isolated building, and gives the quantitative parameters and quantification value of performance index. The specific contents are as follows: first, according to the characteristics and application scope of base-isolated building, the use function is considered. Social function, on the basis of the design reference period, the base-isolated building is divided into three categories according to its importance: a, B, and C, and the design reference period is 200, 100, 50 years respectively. Second, the level expression of foundation isolation building's fortification level is put forward. In addition, the level of fortification is divided into four levels. The transcendence probability of the four levels in the design reference period is 6310 and 50.The third, the performance level of the base-isolated structure is set to four: fully operational, serviceable, safe, close to collapse. The target of fortification should be the full operation of frequent earthquakes, the use of occasional earthquakes, the safety of rare earthquakes, and the prevention of collapse by extremely rare earthquakes. Fourthly, the isolation layer displacement and inter-story displacement angle at the performance level of the foundation isolation structure are obtained by comprehensive analysis. There are three performance indexes of floor acceleration, and the quantized values of the displacement of isolation layer and the displacement between layers are given theoretically, and the index of floor acceleration is obtained by theoretical analysis and shaking table test.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.12

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