饱水混凝土常规三轴压缩力学特性研究  

Research on the conventional triaxial compressive properties of saturated concrete

作　　者：张永亮[1,2] 姚华彦[1,3,2] 朱大勇[1,2] 李永池[3] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]安徽省土木工程结构与材料省级实验室,安徽合肥230009 [3]中国科学技术大学近代力学系,安徽合肥230027

出　　处：《混凝土》2015年第3期63-66,共4页Concrete

基　　金：国家自然科学基金青年基金(11102205);中国博士后科学基金(20100480685;2011M501394)

摘　　要：对饱水和干燥状态下的混凝土进行三轴和单轴压缩试验,对比干燥状态下的试验结果表明:饱水混凝土具有明显的围压效应,抗压强度随着围压的增大显著提高;Bresler-Pister准则能更准确地描述混凝土强度的非线性特征,随围压的增大,饱水和干燥混凝土的强度变化的趋势出现明显的差别;相同围压下,饱水混凝土的抗压强度低,割线模量小,峰值应变大,变形能力增强;饱水混凝土因水的影响表现出良好的延性。It focuses on the different confining pressure triaxial compression tests and uniaxial compression tests on saturated and dried concrete.Compared with the dried concrete mechanical test, the results show that the saturated concrete has obvious confining pressure effect ,and compressive strength increases as confining pressure significantly increased.Bresler- Pister criterion can describe the nonlinear strength characteristics of concrete more accurately than others, while the nonlinear trends apparent differences between saturated and dry concrete.In same confining pressure, saturated concrete compressive strength is low, the seeant modulus is small, the peak strain is large, and the concrete＇s deformation capacity is enhanced.Saturated concrete exhibits good ductility due to the effects of water.

关 键 词：饱水混凝土 围压 强度准则 应力应变 

分 类 号：TU528.01[建筑科学—建筑技术科学]