Methodology for the combined strong wind and earthquake hazard map
Strong winds and earthquakes are widely distributed throughout China.The existing zoning maps for winds and earthquakes ignore the structural safety issues caused by their coupled effects.To improve the theory of multi-hazard design for engineering structures,this paper proposes a method of compiling a joint hazard zoning map for strong wind and earthquakes based on real data.The data of strong winds and earthquakes in Sichuan and Yunnan in 50 years are collected,and the accuracy of the data is determined by comparing the respective single-hazard zoning.The criteria for determining the simultaneous occurrence of strong winds and earthquakes are given,the joint probability model is established,the hazard probability is calculated,and the joint hazard zoning map is obtained by linear interpolation and fitting.The study shows that the joint wind and earthquake hazard zoning map provides strong data support for the distribution of the coupled phenomenon of the two hazards;the method of compiling the joint hazard zoning replaces the correlation analysis with the analysis of the probabilistic accuracy of the real data,which is more universal;the zoning map takes into account the distribution of the probability of the two types of hazards occurring at the same time and the intensity level,and improves most of the existing strong wind and earthquake hazard zoning maps.The zoning map considers the probability distribution and intensity level of the two hazards,which enhances the assumption that the intensity of the two hazards is unsupported in most current studies on the simultaneous effects of strong winds and earthquakes.
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