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Making Evaluation System of Seismic Resistance for Concrete Structures

混凝土结构抗震评价体系的制定

基本信息

批准号：
14350233
负责人：
UMEHARA Hidetaka
金额：
$ 9.47万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350233/
关键词：
simulation of strong ground motion ground response analysis shear capacity three dimensional nonlinear dynamic response analysis concrete bridge 地震動予測法

项目摘要

The purpose of this study is to make an evaluation system of seismic resistance for concrete structures in urban area using three dimensional nonlinear dynamic response analysis whose input data are structural dimensions and seismic ground motion obtained from the seismic wave at the structure location.The following studies were conducted in this research.(1) The seismic waves of Hyogo-ken nanbu Earthquake, the hypothetical earthquakes of Tokai, Tounankai and their coupled earthquake, Sanrikuminami Earthquake, and Tokachioki Earthquake in 2003 were developed using the simulation technique, EMPR, for non-stationary strong motion time histories on the upper surface of so-called engineering basemental rock. Then the seismic ground motions of these earthquakes at the structure location were obtained using the ground response analysis, so-called FDEL, which incorporates the erect of frequency dependent equivalent strain characteristics on the shear rigidity and damping.(2) The computer program of three dimensional nonlinear dynamic response analysis was improved and extended to consider the high strength reinforcement. The reinforced concrete beams with a small amount of web reinforcement were tested in order to compare the estimated shear strength calculated by summing up the shear strength of concrete beams without web reinforcement (Vc) and web reinforcement (Vs) to the tested shear strength (Vu). In conclusion, the superposition method (Vc+Vs) is applicable for estimating the shear strength of beams with a small amount of web reinforcement.(3) From this research it is found that the ground condition at the structure location, dominant frequency of ground motion, and wave profile after the peak of ground motion are important parameters to evaluate the seismic resistance for concrete structures.

本研究的目的是建立一个以结构尺寸和地震波输入的三维非线性动力反应分析为输入数据的城市混凝土结构抗震性能评估系统。(1)利用模拟技术EMPR，对2003年兵库县南部地震、假想的东海地震、东南海地震及其耦合地震、三陆南地震、十胜置地震的地震波进行了模拟，得到了所谓的工程基岩上表面非平稳强震时程。然后，这些地震在结构位置的地震地面运动，得到使用地面反应分析，所谓的FDEL，其中包括直立的频率相关的等效应变特性的剪切刚度和阻尼。(2)对三维非线性动力反应分析程序进行了改进和扩充，使之能考虑高强钢筋的作用。为了比较无腹筋混凝土梁的抗剪强度（Vc）和无腹筋混凝土梁的抗剪强度（Vs）与试验抗剪强度（Vu）的估算值，对有少量腹筋的钢筋混凝土梁进行了试验。因此，叠加法（Vc+Vs）适用于估算腹板配筋量较少的梁的抗剪强度。(3)研究发现，结构所在地的地面条件、地震动的主频、地震动峰值后的波形是评价混凝土结构抗震性能的重要参数。