基于规范条件下地震动选择与调整的评估

发布时间：2018-09-13 12:09

【摘要】：《建筑抗震设计规范》(GB50011-2010)要求使用地震动来进行抗震设计和非线性时程分析。然而,《建筑抗震设计规范》(GB50011-2010)中对于地震动的选择的结果与其他现行抗震规范中对于地震动的选择规定相比而言比较模糊。通过详细对比《欧洲规范》(Eurocode-8)与《建筑抗震设计规范》(GB50011-2010),《建筑抗震设计规范》(GB50011-2010)中的一些选择标准是被推荐的。基于《建筑抗震设计规范》(GB50011-2010)中所推荐的标准,地震动的选择与调整作为工程约束优化问题(即在一段感兴趣的周期范围内选择与调整地震动以减小设计反应谱和平均反应谱的区别)是可被数学论证的。对于这样一个约束优化问题,可以使用类似在音乐中寻找完美和谐状态概念的和声搜索算法(HS),并在本研究中结合修正的约束处理技术来进行基于适当的优先级排序。本文从太平洋地震工程研究中心(PEER 2011)强地震动数据库中选出704条地震动,并以震级、距离和现场条件等方面建立一个地震动搜索空间。然后在此搜索空间中使用改进后的HS算法得到与《建筑抗震设计规范》(GB50011-2010)中定义的设计谱相近的地震动集。并将选择与调整的地震动作用于建立好的框架模型上并分析其动力响应,数值结果表明,改进的HS算法是一种有效的方法来生成与《建筑抗震设计规范》(GB50011-2010)设计反应谱相近的地震动集。
[Abstract]:The Code for Seismic Design of buildings (GB50011-2010) requires the use of ground motion for seismic design and nonlinear time-history analysis. However, the selection of ground motion in the Code for Seismic Design of buildings (GB50011-2010) is rather vague than that in other current seismic codes. By comparing the European Code (Eurocode-8) with the Code for aseismic Design of buildings (GB50011-2010), some selection criteria in Code for Seismic Design of buildings (GB50011-2010) are recommended. Based on the standards recommended in the Code for Seismic Design of buildings (GB50011-2010), The selection and adjustment of ground motion as an engineering constrained optimization problem (i.e. selecting and adjusting ground motion in a period of interest to reduce the difference between the design response spectrum and the average response spectrum) can be mathematically demonstrated. For such a constrained optimization problem, we can use the harmony search algorithm (HS), which is similar to finding the concept of perfect harmonious state in music, and combine the modified constraint processing technique in this study to carry out the ranking based on the appropriate priority. In this paper, 704 ground motions are selected from the strong ground motion database of the Pacific earthquake Engineering Research Center (PEER 2011), and a seismic search space is established in terms of magnitude, distance and site conditions. Then the improved HS algorithm is used in the search space to obtain the seismic ground motion set which is similar to the design spectrum defined in the Code for Seismic Design of buildings (GB50011-2010). The selected and adjusted seismic action is used to build the frame model and its dynamic response is analyzed. The numerical results show that, The improved HS algorithm is an effective method to generate ground motion sets similar to the design response spectrum of the Code for Seismic Design of buildings (GB50011-2010).
【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】：TU352.11

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