Response spectrum of seismic design code for zones lack of near-fault strong earthquake records  

作　　者：李新乐 窦慧娟 朱晞 孙建刚 

机构地区：[1]College of Architecture and Civil Engineering,Dalian Nationalities University [2]College of Architecture and Civil Engineering,Beijing JiaoTong University

出　　处：《Acta Seismologica Sinica(English Edition)》2007年第4期447-453,共7页

基　　金：National Natural Science Foundation of China (50278002);Dalian Nationalities University Ph D Foundation (20066104)

摘　　要：It was shown from the study on the recently near-fault earthquake ground motions that the near-fault effects were seldom considered in the existing Chinese seismic code. Referring to the UBC97 design concept for near-fault factors, based on the collected world-widely free-site records of near-fault earthquakes ground motions classified by earthquake magnitude and site condition, the attenuation relationship expressions of the acceleration spectrum demand at the key points within the long period and moderate period were established in term of the earthquake magnitude and the site condition. Furthermore, the near-fault factors＇ expressions about the earthquake magnitude and the fault distance were deduced for the area lack of near-fault strong earthquake records. Based on the current Chinese Building Seismic Design Code, the near-fault effect factors and the modified design spectral curves, which were valuable for the seismic design, were proposed to analyze the seismic response of structures.It was shown from the study on the recently near-fault earthquake ground motions that the near-fault effects were seldom considered in the existing Chinese seismic code. Referring to the UBC97 design concept for near-fault factors, based on the collected world-widely free-site records of near-fault earthquakes ground motions classified by earthquake magnitude and site condition, the attenuation relationship expressions of the acceleration spectrum demand at the key points within the long period and moderate period were established in term of the earthquake magnitude and the site condition. Furthermore, the near-fault factors＇ expressions about the earthquake magnitude and the fault distance were deduced for the area lack of near-fault strong earthquake records. Based on the current Chinese Building Seismic Design Code, the near-fault effect factors and the modified design spectral curves, which were valuable for the seismic design, were proposed to analyze the seismic response of structures.

关 键 词：near-fault strong earthquake records spectral demand design response spectrum near-fault effect factor 

分 类 号：P315.9[天文地球—地震学]