高強度混凝土軸壓下之力學行為

Abstract

由於科技日新月異,混凝土的強度也日漸提高,應用範圍也愈來愈廣,尤以 超高層大樓比比皆是,長跨距橋樑也屢見不鮮,在在都增加了對高強度混凝 土(HSC)的需求.高強度混凝土一般定義為強度6000psi以上,在一般試驗室 已無問題,甚至可達到16000psi.由於高強度混凝土一般均用於超高層大樓 之柱內,或長跨距橋樑之預力樑,其力學特性自是極為重要,本文利用精密 的MTS Rock Mechanics System ,研究HSC之單軸力學性質,作出適合本土 使用 HSC之基本力學性質.本文即對混凝土抗壓強度為6000,8000,10000 psi的混凝土,研究其力學性質,加以探討,並驗證以往對普通混凝土之經驗 公式是否可適用於HSC ,亦將研究HSC之應力-應變關係. Due to development of new technology , the ultimate strength of concrete reaches a higher level . The application of concrete in the construction is increasing , especially for rise building and for long span bridges . All of these demand the use of high strength concrete (HSC) . HSC is generally defined as a compressive strength of 6000psi . These requirements can easily be achieved in laboratory , and level 16000psi concrete cab be reached . Because the HSC are generally used for high rise building and bridges , the mechan- ical behavior and characteristics are very important . This st- udy is focused on the mechanical properties of HSC under unaxial compression by using MTS Rock Mechanical System . This research proposal is aimed to study the mechanical beh- avior of concrete with 6000 psi,8000 psi,10000 psi strength.