Verification of seismic performance of building using popular seismometers

使用流行的地震仪验证建筑物的抗震性能

基本信息

批准号：
12308018
负责人：
KABEYASAWA Toshimi
金额：
$ 31.49万
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 (A)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2003
项目状态：
已结题

项目摘要

Dynamic tests were conducted on a third scale reinforced concrete wall-frame structures with considerable stiffness and strength eccentricity in the first story. Two specimens with the same sectional dimensions and reinforcement details were constructed and tested simultaneously on the large shaking table at NIED, Tsukuba. One was a bare reinforced concrete structure, while the other was strengthened with polyester fiber sheet. The columns without strengthening failed in shear resulting in collapse associated with loss of the axial load carrying capacity, whose collapse process was traced on the basis of test results. On the other hand, the strengthened frame not only responded stably to the same input motion with minor damage but also survived still higher levels of succeeding input motions. The analytical model is presented to simulate the collapse of the columns for nonlinear dynamic frame analysis with hysteretic deterioration. Different types of seismometers were installed to measure story drift responses from accelerograms. A method of filtering for integration of acceleration was developed, which was verified from the shaking table test. Dense field observation system of seismographs has been set up in school buildings to identify the earthquake responses including the effect of soil-structure interaction with inelastic behaviour of soil. The observed response under a moderate earthquake was analysed by the detailed frame model with and without SSI. A better correlation is observed in case of the analysis with SSI.

对一层具有相当刚度和强度偏心的三级钢筋混凝土墙框架结构进行了动力试验。在筑波 NIED 的大型振动台上同时构建和测试两个具有相同截面尺寸和加固细节的样本。一种是裸露的钢筋混凝土结构，另一种是用聚酯纤维片加固。未加固的柱子因剪力破坏而发生倒塌并丧失轴向承载能力，根据试验结果追踪倒塌过程。另一方面，强化后的框架不仅能够稳定地响应相同的输入运动，且损坏较小，而且还能承受更高水平的后续输入运动。提出了分析模型来模拟柱的倒塌，以进行具有迟滞恶化的非线性动力框架分析。安装了不同类型的地震仪来测量加速度图的故事漂移响应。提出了一种加速度积分滤波方法，并通过振动台试验进行了验证。在学校建筑中建立了密集的地震仪现场观测系统，以识别地震反应，包括土壤-结构相互作用与土壤非弹性行为的影响。通过具有和不具有 SSI 的详细框架模型分析了中震下观察到的响应。在使用 SSI 进行分析时观察到更好的相关性。