双曲线冷却塔在多维地震下的区域易损性评价
发布时间：2019-02-28 12:17
【摘要】：为探讨某在役钢筋混凝土冷却塔结构不同部位的地震易损性,通过数值模拟进行分析.应用ABAQUS软件建立分析模型,根据结构所在场地选择一系列合理的地震动记录并对结构进行增量动力分析;选取了材料应变和地面峰值加速度作为结构地震需求参数和强度参数,将结构沿高度方向分为13个区域,并将结构的破坏状态划分为5个等级;在结构底部分别输入单向、水平双向和三向地震作用,对所得结构响应进行回归分析并建立概率地震需求模型,最终得到结构沿高度方向的区域易损性曲线.分析结果表明:上部塔筒的损伤概率较小,人字柱的损伤概率明显大于结构的其他部分;结构底部的人字支柱是结构的最薄弱部位,可根据需要对其进行加固,而塔筒的抗震性能优异.
[Abstract]:In order to investigate the seismic vulnerability of a reinforced concrete cooling tower structure in service, the seismic vulnerability was analyzed by numerical simulation. The ABAQUS software is used to set up the analysis model and select a series of reasonable ground motion records according to the site where the structure is located and carry on the incremental dynamic analysis to the structure. Material strain and ground peak acceleration are selected as seismic demand and strength parameters of the structure. The structure is divided into 13 regions along the direction of height, and the failure state of the structure is divided into 5 grades. In this paper, unidirectional, horizontal bi-directional and three-way seismic action are inputted into the bottom of the structure respectively, and the response of the structure is analyzed by regression analysis and the probabilistic seismic demand model is established. Finally, the regional vulnerability curve of the structure along the direction of height is obtained. The results show that the damage probability of the upper tower is small, and the damage probability of the herringbone column is obviously higher than that of the other parts of the structure. The herringbone pillar at the bottom of the structure is the weakest part of the structure, which can be strengthened according to the need, and the seismic performance of the tower tube is excellent.
【作者单位】： 北京交通大学土木建筑工程学院;
【基金】：国家自然科学基金面上项目(51478033,51678039)
【分类号】：TU311.3
，
本文编号：2431795
[Abstract]:In order to investigate the seismic vulnerability of a reinforced concrete cooling tower structure in service, the seismic vulnerability was analyzed by numerical simulation. The ABAQUS software is used to set up the analysis model and select a series of reasonable ground motion records according to the site where the structure is located and carry on the incremental dynamic analysis to the structure. Material strain and ground peak acceleration are selected as seismic demand and strength parameters of the structure. The structure is divided into 13 regions along the direction of height, and the failure state of the structure is divided into 5 grades. In this paper, unidirectional, horizontal bi-directional and three-way seismic action are inputted into the bottom of the structure respectively, and the response of the structure is analyzed by regression analysis and the probabilistic seismic demand model is established. Finally, the regional vulnerability curve of the structure along the direction of height is obtained. The results show that the damage probability of the upper tower is small, and the damage probability of the herringbone column is obviously higher than that of the other parts of the structure. The herringbone pillar at the bottom of the structure is the weakest part of the structure, which can be strengthened according to the need, and the seismic performance of the tower tube is excellent.
【作者单位】： 北京交通大学土木建筑工程学院;
【基金】：国家自然科学基金面上项目(51478033,51678039)
【分类号】：TU311.3
，
本文编号：2431795
本文链接：https://www.wllwen.com/jianzhugongchenglunwen/2431795.html
