Research on the evaluation of earthquake, shock and heat resistance of various underground reinforced concrete facilities in urban space.

城市空间各类地下钢筋混凝土设施抗震、抗震、耐热评价研究。

基本信息

批准号：
15510154
负责人：
MUTOH Atsushi
金额：
$ 1.41万
依托单位：
Meijo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

Concrete composite continuous structures such as RC shells have excellent structural performance and there is a growing tendency to adopt for various underground container structures in Japan. However, many types of these kinds of structures have many problems concerning their earthquake, shock and fire resistance.In this research, earthquake response analysis technique considering geometric nonlinearity and material nonlinearity is presented for the purpose of making to be the aid of the evaluation of earthquake resistance by numerical analysis for RC shells. The fundamental analysis on nonlinear vibration property of the RC spherical shell is tried, and the results of trying the evaluation of damage levels and collapse levels by numerical analysis in the time history are shown.Next, computational methods to evaluate the fire resistance of concrete structures are presented and some computational examples are shown. The purposes of this study are ; 1)to present the method of heat and moisture transfer analysis, 2)to propose the elasto-plastic thermal stress analysis method taking into account of the moisture effects. The validity of these analysis methods for concrete members under high temperature is evaluated.This research was done to develop a simulation method to estimate the coupled heat and mass transfer in porous media such as concrete. A finite element analysis, assuming a homogeneous elastic material, is used to study the temperature and the rate of moisture propagation through a concrete wall under different time dependent temperature/moisture boundary conditions.

RC壳等混凝土组合连续结构具有优异的结构性能，在日本各种地下集装箱结构中越来越多地采用。然而，此类结构中的许多类型在抗震、抗震和抗火方面存在许多问题。本研究提出了考虑几何非线性和材料非线性的地震反应分析技术，以帮助评估结构的抗震性能。 RC 壳的抗震性能数值分析。尝试对RC球壳的非线性振动特性进行基础分析，并给出了尝试通过数值分析评价时程损伤等级和倒塌等级的结果。接下来，评估混凝土结构耐火性能的计算方法给出了一些计算示例。本研究的目的是； 1）提出热湿传递分析方法，2）提出考虑水分影响的弹塑性热应力分析方法。评估了这些分析方法对于高温下混凝土构件的有效性。本研究的目的是开发一种模拟方法来估计混凝土等多孔介质中的耦合传热传质。假设采用均质弹性材料，有限元分析用于研究不同时间相关的温度/湿度边界条件下的温度和水分通过混凝土墙传播的速率。