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Verification research on inelastic seismic behavior of soil-foundation-structure system

土-地基-结构体系非弹性抗震性能验证研究

基本信息

批准号：
16360272
负责人：
KABEYASAWA Toshimi
金额：
$ 9.47万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360272/
关键词：
soi ; structure-interaction input loss effective input earthquake motion inelastic behavior SSI system strong motion observation seismic performance

项目摘要

The objective of the research project is to verify the input energy dissipation of earthquake motion at the base in soil-foundation-structure systems by on-site observation and test, SSI analysis and theory, with specific focus on the neighborhood inelastic behavior of soil. The observation research includes aftershock observation and the post-earthquake damage evaluation after Niigata-Chuuetsu Earthquake, October 2004, which was conducted with a specific research objective on identification of input loss of base motion at the foundation and neighborhood soil. A strong motion with very high spectral intensity was recorded during the main shock at K-net Ojiya station. Using the record as the base input motion to structures, large inelastic displacement responses were calculated, although the observed damages to reinforced concrete buildings seemed to be generally less than those in the calculation. The aftershocks were observed at a free field and in a school building nearby the K-net s … More tation to identify the difference at these sites. Relatively high aftershock up to the level 2 of the design motion in the Building Standard Law was obtained, where the input motion into the building was obviously reduced from those at the free field and the K-net station, which might be due to the input loss or soil-structure interaction at the neighborhood foundation. The main shocks recorded at the K-net and the JMA stations were assumed as possible input base motions to the structure, while the observed damages to the structure were compared with the calculated responses. It may be concluded from the analysis that the intensity of the main shock into the structure was obviously much less than that of K-net and probably also less than that of JMA. An on-site static pushover test on a school building in Ojiya was also conducted, from which inelastic behavior in lateral resistance at foundation level was identified. Analytical model is developed which fairly simulates these observation and test data. Input losses due to these effects are approximated in a general practical form Less

本研究的目的是通过现场观测和试验、SSI分析和理论验证土-基础-结构系统中基础地震输入能量的耗散，特别是对邻近土体的非弹性行为。观测研究包括2004年10月新泻中越地震后的余震观测和震后损害评估，其具体研究目标是识别基础和邻近土壤的基础运动输入损失。在主震期间，K-net Ojiya站记录到一个具有非常高谱强度的强烈运动。使用记录作为结构的基础输入运动，计算大的非弹性位移响应，虽然观察到的钢筋混凝土建筑物的损坏似乎一般小于计算中的。余震是在K-net附近的一个自由场地和一所学校大楼内观察到的 ...更多信息以确定这些站点的差异。结果表明，该模型的余震强度可达建筑标准法设计运动水平的2级，输入运动较自由场和K网测点明显减小，可能是由于输入损失或相邻地基土-结构相互作用的影响。在K-net和JMA站记录的主震被假定为可能的输入基础运动的结构，而所观察到的结构的损坏与计算的响应进行了比较。分析结果表明，该结构的主震强度明显小于K-net，也可能小于JMA。此外，还对王子屋某学校建筑进行了现场静力推覆试验，确定了地基水平侧阻力的非弹性特性。建立了能较好地模拟这些观测和试验数据的分析模型。由于这些影响的输入损失近似在一个一般的实际形式减