关于举办加拿大西安大略大学Hanping Hong教授讲座的通知
发布时间: 2019-12-30

  目:Assessment of Seismic Hazard for Mainland China Based on Spatially Smoothed Seismicity(基于空间平滑地震的中国大陆地震危险性评价)

  间:20201310:0011:00

  点:华南理工大学7号楼二楼大会议室

报告人:Hanping Hong(洪汉平)教授(加拿大西安大略大学)

欢迎广大师生参加

                    土木与交通学院

                    20191230



报告人简介:

洪汉平教授研究专长包括概率分析、可靠性和风险评估、自然灾害建模和设计规范校准等领域。他为基于可靠性和经济高效的结构设计规范制定和校准做出了贡献。他的研究旨在为土木结构和基础设施提供基于信息敏感可靠性的设计。他对加拿大建筑、桥梁、标志支撑结构、海洋结构进行了基于可靠性的设计规范校准/验证研究。

洪汉平教授正积极参与多个设计法规和标准委员会的工作,包括加拿大国家建筑规范(结构设计常设委员会)、加拿大公路桥梁设计规范(CAN/CSA S6)、加拿大国家建筑规范(CAN/CSA S157)、加拿大国家标准化委员会(CAN/CSA-O86)、加拿大国家标准化委员会(CSA-S408-81)和加拿大国家标准化委员会(CSA-S408-81)极限状态设计的发展。

洪汉平教授持有B.Eng.M.Engand Eng博士学位,均来自墨西哥国立自治大学(UNAM)。他是墨西哥工程学院的外籍成员,也是加拿大土木工程学会的成员。

 

报告摘要:

The ground motion models (GMMs) used to map seismic hazard in China were developed based on the so-called projection method assuming relations of a pair of predicted macro-intensities and of a pair of predicted ground motion measures in two different regions.  The use of such a method is necessary because the ground motion records of a large number of strong earthquakes are lacking in mainland China, although the catalogue of historical Chinese earthquakes is relatively rich.

  In this presentation, we present some of our recent results focused on the development of sets of projected GMMs and their use in mapping the seismic hazard for mainland China.  The projected GMMs are based on the GMMs from NGA-West2.  It is shown that the projected GMMs differ slightly from their corresponding original versions and that the predicted median PGA values by the projected GMMs represent well the instrumental ground-motion data.  By using the newly projected sets of GMMs and spatially smoothed seismicity, the seismic hazard for mainland China and uniform hazard spectrum (UHS) are estimated carried out.  The results indicate that the estimated seismic hazard agrees with that reported in the 5th generation Chinese seismic hazard map (CSHM) at many sites.  However, large discrepancies are also observed for a few locations.  These discrepancies are partly attributed to how the large historical earthquake events are spatially smoothed.  It is pointed out that the estimated shape of the UHS for regions with a significant seismic hazard is relatively consistent but differs from the standardized seismic design spectrum recommended in Chinese design code.  In addition, the statistical analysis results indicate that the coefficient of variation of the annual maximum PGA is spatially varying and ranges from 1.6 to 5.6 ranges, that the ratio of 2475-year return period value of PGA to that of 475-year return period is, on average, about 2, and that ratio of 2475-year return period value of PGA to that of 50-year return period value varies spatially, with an average of about 6.