高温对混凝土力学性能影响的试验研究

本文利用大连理工大学海岸和近海工程国家重点实验室的大型混凝土静、动三轴试验系统，对常温20℃及200℃～600℃高温后的混凝土进行了力学性能试验，测得了混凝土的抗压强度、抗拉强度、应变及弹性模量，并根据试验结果，系统地探讨了高温后混凝土的力学性能。在此基础上建立了高温后混凝土的破坏准则，这些结论，为受高温后的混凝土结构。如火灾后的建筑物、烟囱、核反应堆安全壳等混凝土结构的设计、分析提供理论依据。

Testing research of mechanics characteristics of concrete affected by high temperature

In this paper,the mechanics tests of concrete at 20 degrees Centigrade normal temperature and 200 degrees Centigrade and 600 degrees Centigrade high temperature were completed,using the large static-dynamic triaxial test system for concrete in the State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,The compressive strength,tensile strength,strain and elastic modulus were achieved,The mechanics characteristics of concrete affected by high temperature were probed in a systematic way, On the basis of the tests,the failure criterion of concrete subjected high temperature was established,The conclusions can provide theoretic basis for the design and analysis of concrete structures,such as buildings after fire,chimneys and safety shell of nuclear reactor.