适用于我国抗震设计规范的天然强震记录选取

发布时间：2018-04-16 22:31

本文选题：强震记录选取 + 地震信息　；参考：《建筑结构学报》2017年12期

【摘要】：随着国内外强震记录的积累和结构时程分析的广泛应用,抗震设计中强震记录的选取作为重要的基础性工作受到广泛关注。以我国现行建筑抗震设计规范中的天然强震记录选取为研究对象,基于美国PEER的NGA-West1数据库和我国数字强震台网2007—2015年强震记录数据建立备选数据库,对地震信息筛选条件以及调幅系数区间做了分别研究,提出了利用全周期段匹配结果进行权重函数优化,整理总结了一套系统的包含地震信息筛选、调幅匹配以及筛选验证的完整强震记录选取流程,并选用12层和3层典型平面混凝土框架对不同记录选取方案做了数值模拟验证,采用ATC-63推荐的远场数据集(44条)拟合了该结构的最大层间位移角预测模型,对比抗震设防烈度为7、8度设计目标谱工况下不同强震记录选取方案的数值分析结果,证明全周期段优化权重匹配记录选取方案数值模拟结果与预测响应具有较好一致性,且离散性要优于传统记录选取方案。最后针对常用的7度、8度以及9度罕遇地震作用下的Ⅱ类场地,对应于我国抗震规范目标谱给出了供工程、科研人员参考选用的记录数据集。
[Abstract]:With the accumulation of strong earthquake records at home and abroad and the wide application of structural time history analysis, the selection of strong earthquake records as an important basic work in seismic design has received extensive attention.Based on the NGA-West1 database of PEER in the United States and the strong earthquake record data of China Digital strong earthquake Network from 2007 to 2015, the natural strong earthquake records in the current code for seismic design of buildings in China are taken as the research object.The screening conditions of seismic information and the interval of amplitude modulation coefficient are studied, and the weight function optimization is proposed by using the matching results of the whole period segment, and a set of system including seismic information screening is summarized.The selection process of complete strong earthquake records for amplitude modulation matching and screening verification is also presented, and the 12 and 3 story typical plane concrete frames are used to simulate the different record selection schemes.Using 44 far field data sets recommended by ATC-63, the prediction model of maximum interstory displacement angle of the structure is fitted, and the numerical analysis results of different strong earthquake record selection schemes under the design target spectrum of 7 ~ 8 degree seismic fortification intensity are compared.It is proved that the numerical simulation results are consistent with the predicted response and the discreteness is better than the traditional record selection scheme.At last, according to the target spectrum of seismic code of our country, the record data set for engineering and scientific research personnel is given for reference and selection for the second kind of site under the action of rare earthquakes of 7 degrees or 8 degrees and 9 degrees, corresponding to the target spectrum of seismic code of our country.
【作者单位】：中国地震局工程力学研究所;中国地震局地震工程与工程振动重点实验室;
【基金】：国家自然科学基金项目(51308515) 公益性地震行业科研专项(201508005) 黑龙江省科技基金项目(LC2015022)
【分类号】：TU352.11

【相似文献】