基于网格化和雷达图的建筑抗震设防最优烈度决策模型研究

Research on optimal intensity decision model of building seismic fortification based on grid and radar map

目前的建筑抗震设防最优烈度研究主要是从经济性或安全性进行考虑,然而合理的建筑抗震设防最优烈度需要综合考虑经济和安全性指标。本文将研究区域进行网格化,结合其周围历史地震数据进行地震危险性分析,以经济性指标和安全性指标作为抗震设防最优烈度评价指标;运用博弈论组合赋权法确定各指标权重,建立基于网格化和雷达图的建筑抗震设防最优烈度决策模型,将该模型运用到四川省崇州市钢混结构和砖混结构的抗震设防研究中。通过对比分析该模型数据发现:钢混结构按8度设防时,相比于6度、7度和9度设防,其抗震设防综合效益分别提升57.2%、29.6%和3.9%;砖混结构按8度设防时,相比于未设防、6度、7度和9度设防的抗震设防综合效益分别提升60.6%、19.2%、2.4%和1.9%。因此,崇州市钢混结构和砖混结构按8度设防时,为最优抗震设防烈度,抗震设防综合效益最佳,验证了该模型的有效性。

At present,the research on optimal intensity of seismic fortification of buildings is mainly based on economy or safety.However,reasonable optimal intensity of seismic fortification of buildings needs comprehensive consideration of economic and safety indexes.In this paper,the research area is meshed,seismic risk analysis is carried out based on the historical seismic data around it,and economic index and safety index are taken as the evaluation index of the optimal intensity of seismic fortification,the weight of each index is determined by the game theory combination weighting method,and the decision model of the optimal intensity of seismic fortification of buildings is established based on the grid and radar map.The model is applied to the study of seismic fortification of steel-concrete structure and brick-concrete structure in Chongzhou city,Sichuan Province.Through comparative analysis of the model data,it is found that when the steel-concrete structure is fortified at 8 degrees,the comprehensive efficiency of seismic fortification increases by 57.2%,29.6%and 3.9%,respectively,compared with 6 degrees,7 degrees and 9 degrees.When the brick-concrete structure is fortified according to 8 degrees,the comprehensive efficiency of seismic fortification is increased by 60.6%,19.2%,2.4%and 1.9%,respectively,compared with that without fortification,6 degrees,7 degrees and 9 degrees.Therefore,when the steel-concrete structure and brick-concrete structure of Chongzhou city are fortified according to 8 degrees,the seismic fortification intensity is the best,and the comprehensive benefit of seismic fortification is the best,which verifies the validity of this model.