| Summary: | 碩士 === 國立雲林科技大學 === 營建工程研究所 === 88 === An Analyse on Concrete which Under High Temperature
with Strength Change
Student：Wang, Chun Wen Advisors：Dr. Tsai, Cho Liang
Institute of Construction Engineering
National Yunlin University of Science & Technology
ABSTRACT
Under normal conditions of environment exposure, concrete is subjected to temperatures below about 50C. For many problems of concrete engineering, however, higher temperatures ranging from 50C to several hundred degrees Celsius can become of great importance.
The first attempt at the study of concrete under high temperatures came from problems with the fire resistance of buildings. Concrete has excellent properties in this regard compared with most of traditional constructional materials and can be used effectively to shield other structural materials such as steel. The response of concrete to different temperature and exposure time needs to be studied if the fire resistant capability of the RC structure is to be estimated.
The response of concrete to high temperature is complicated. Chemical and micromechanic behaviors of the concrete are not in the scope of this study. Experiments are conducted to characterize the macromechanic response. The residual strength of concrete after heat treatment is related to the temperature and exposure time mathematically from the analysis of the experimental data. The result can be used to predict the residual strength of concrete after any kind of heat treatment with variable temperature time history.
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