利用PEER网站选取地震波的方法

参考:https://wenku.baidu.com/view/824c63a6d0d233d4b04e6902.html


PEER是Pacific Earthquake Engineering Research Center(太平洋地震工程研究中心)的简称,设立在美国的加州大学伯克利分校(University of California, Berkeley)。由其运作的PEER Ground Motion Database(PEER地震动数据库)提供了大量的世界各地的地震记录,可自由下载。该网站提供了丰富的查询手段,可按距离、场地、震源类型等条件选择地震记录,也提供了按目标反应谱选择的手段。

主页:http://peer.berkeley.edu/

选择PRODUCTS,进入PEER Ground Motion Database,或者直接进入http://ngawest2.berkeley.edu/。


在线选择与目标反应谱对应的地震波:http://ngawest2.berkeley.edu/spectras/new?sourceDb_flag=1

或者http://ngawest2.berkeley.edu/,选择NGA-West2 ENTER 图标。但是这个网站好像坏了。


使用seismomatch,左上角step1-open single打开原始地震波,左下角step2-define target spectrum输入定义好的规范谱,然后点左下角do matching就行。

单位统一设为g。

比如7度0.1g,三类土第三组,tg=0.65,反应谱alpha值曲线有了。aipha-max=0.08.这个影响系数的实际单位是g。

地震波首先根据抗规32页调幅值,(注意抗规单位是cm,要变成m)然后读取。就ok了。


帮助文档里参数的NOTE:

The spectrum matching period range (defined by the Min and Max period parameters) should, in principle, consider not only the fundamental vibration period of the structure that will be analysed through nonlinear dynamic analysis, but also the higer modes that might affect the structure's response as well as the effects of period elongation due to damage accumulation (and corresponding structure stiffness decrease).

Setting an exaggeratedly large matching period range, however, may force the original non-stationary characteristics of the record to be lost (or prevent convergence of the matching process), hence care should be exercised in the definition of this input parameter.

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