- 摘 要
-
（1 廣州容柏生建筑結(jié)構(gòu)設(shè)計事務(wù)所， 廣州 510170； 2 中國建筑科學(xué)研究院工程抗震研究所， 北京 100013）
［摘要］現(xiàn)行《地震動參數(shù)區(qū)劃圖》（GB 18306—2015）明確采用的是地震動峰值加速度PGA，而《建筑抗震設(shè)計規(guī)范》（GB 50011—2010）中由設(shè)計反應(yīng)譜演化而來的結(jié)構(gòu)時程分析峰值加速度建議值實(shí)質(zhì)上為有效峰值加速度EPA，兩者概念不同，容易混淆。分析了PGA與EPA的物理含義、關(guān)系與區(qū)別及其與設(shè)計反應(yīng)譜的關(guān)系。指出結(jié)構(gòu)動力時程分析所用地震動記錄調(diào)整應(yīng)基于EPA而非PGA，并給出相應(yīng)流程。對基于EPA地震動記錄調(diào)整方法的優(yōu)缺點(diǎn)進(jìn)行分析，提出一種與地震動記錄特性相適應(yīng)的分段EPA地震動調(diào)整方法，并應(yīng)用于某588m高地標(biāo)建筑的時程分析中，取得良好的效果。
［關(guān)鍵詞］地震動； 地震動峰值加速度； 有效峰值加速度
中圖分類號：TU973, TU312文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)04-0013-05
EPA-based adjustment method of seismic ground motion record and its application
Chang Lei1， Liao Yun1, Wang Yayong2
（1 RBS Architectural Engineering Design Associates， Guangzhou 510170， China；2 Institute of Earthquake Engineering, China Academy of Building Research, Beijing 100013, China）
Abstract:The current Seismic Ground Motion Parameters Zonation Map of China (GB 18306—2015) clearly adopts the peak ground acceleration (PGA), while the peak acceleration value for structural time-history analysis evolved from the design response spectrum in the Code for Seismic Design of Buildings (GB 50011—2010) is actually the effective peak acceleration (EPA). They are two different conceptions and EPA is easily mistaken with PGA in structural seismic analysis. The physical meaning, relationship and difference between PGA and EPA and their relationship with design response spectrum were analyzed. It was pointed out that the adjustment of seismic ground motion records for dynamic time-history analysis of structures should be based on EPA rather than PGA, and the corresponding flow chart was given. Based on the analysis of the merits and demerits of the adjustment method of EPA seismic ground motion records, a segmented EPA seismic ground motion adjustment method was proposed which was suitable for the characteristics of seismic ground motion records, and it was applied to the time-history analysis of a 588m high landmark building, and good results were obtained.
Keywords:seismic ground motion; peak ground acceleration; effective peak acceleration
作者簡介：常磊，博士，高級工程師，Email:changlei@gzrbs.com。
- 下載地址
-
