Research Of Earthquake Early Warning Mode And Capability Assessment Of Earthquake Early Warning

Earthquake is the main reason to cause the damage and collapse of buildings and other engineering structures. As a way to effectively reduce the earthquake disaster, earthquake early warning systems has been researched deeply by many scholars in the world. Most of earthquake early warning systems in our country are in local warning mode. At the same time, some new earthquake early warning systems in remote warning mode are been building up and testing. On the basis of the existing hardware and software, the actual effectiveness of earthquake early warning system has been studied by some scholars. But now there are few research about the performance of early warning system under the regional seismic environment. And there are little research for the potential capability for new earthquake early warning system and the update of the old. The core of this article is on this content. A probability analysis method of earthquake early warning system for early warning capability is proposed. The result of this analysis of the two warning mode is used for comparison to deploy seismic stations and choose the scheme of earthquake warning mode. The author researches the capability of earthquake early warning for assumed earthquake under the condition of fault earthquake, focusing on analyzing the rationality of the fault model and fault rupture direction on the influence of the early warning.In this paper the feasibility and effectiveness of early warning systems in the remote and in-situ detection mode has been studied by research of regional seismic environment and early warning objects. According to the seismic response and the effective warning time, a probability analysis method is proposed by the author to calculate the time and acceleration exceedance probability of site located in the seismo-tectonical region and suffered the shaking induced by potential earthquake in different earthquake warning modes. This method is an effective tool for evaluating the potential ability of Earthquake Early Warning System and choosing the scheme of earthquake warning mode. Basing on the potential sources in the capital-circle and northeast China, taking the capital-circle and Harbin-Dalian high-speed railway for example, time-acceleration analysis maps in different earthquake warning modes are calculated by the author. Basing on these maps and seismic information mode selected reference standards which is proposed by the author, the study results in earthquake warning mode maps and scheme of the capital-circle and Harbin-Dalian high-speed railway.Due to the rapid development of modern earthquake engineering, new constructions have better seismic performances.So modern earthquake early warning system is designed for those earthquakes with large fault length which release a lot of energy. Considering the process of fault rupture, the way of the fault rupture process affected the time for making accurate judgments by early warning systems. And probability analysis method for ability of early warning system is based on the assumption of Cornell point sources, it does not take fault mode into consideration. In this paper, a method by setting earthquake is used to expect the damage of a fault that may arise. Combining the characteristics of the propagation of seismic waves and earthquake warning systems, the method is used to theoretically analysis earthquake early warning capability of earthquake early warning system.