Observation and Analysis of Behavior during earthquake for RC Bridges and Rationalization of Seismic Design for RC Structures

今年是这项研究的最后一年，在东美高速公路的新娘处安装了五个新的地震仪。此外，在研究初期设置在名古屋高速公路小高线的地震仪也被移到了东美高速公路上。目前已经建立了密集的观测网络。虽然东-美高速公路没有观测到大地震，但1999年在名古屋高速公路小高线观测到几次地震波，并对RC桥梁体系在地震中的行为进行了分析。在此基础上，开发了百万阶自由度问题的求解器，对名古屋市整个区域的模型进行了数值振动试验。测试是在本课题研究成果的基础上进行的一个更深入的项目，第一阶段已经完成。即针对由多个桥墩组成的桥梁体系，开发了基于柔度法的非线性动力响应分析工具。充分利用所开发的工具，阐明钢筋混凝土桥梁体系在地震作用下的性能，使钢筋混凝土结构抗震设计合理化，是本项目的目的。在此基础上，结合地震反应观测和大自由度动力分析，将得到更有用的结果。

This year is a final year of this study and new five seismometers were set up at brides in Higashi-Meihan Expressway. Moreover, seismometers that had set up at Odaka line of Nagoya Expressway during earlier period of the study, were moved into Higashi-Meihan Expressway. At present, dense observation network has been established. Although big earthquakes have not observed for Higashi-Meihan Expressway, several earthquake waves were observed at Odaka line of Nagoya Expressway in 1999 and the analysis of behavior during the earthquake for the RC bridge system were performed.In parallel with above effort, the solver that is available to the problem having one million order degree of freedoms have been developed to perform numerical vibration tests for the model of the whole area of Nagoya city. The test is more progressed project based on the results of this topic and the first stage is finished. That is, analytical tools of nonlinear dynamic response based on the flexibility method for a bridge system which is composed from many bridge piers was developed.Elucidation of behavior of RC Bridge system during earthquakes and rationalization of seismic design for RC structures which are purpose of this project will be possible according as the full utilization of the developed tools. Based on this project, we will get more useful results combining observation of response during earthquake and dynamic analysis eith enormous degree of freedoms.