冻融循环后湿筛混凝土双轴拉压试验研究  

Experimental study of wet-screened aggregate concrete after freeze-thaw cycles under biaxial tension and compression

作　　者：徐秀娟[1] 

机构地区：[1]大连海洋大学职业技术学院,辽宁大连116300

出　　处：《混凝土》2012年第8期31-33,共3页Concrete

基　　金：国家自然科学基金委员会资金项目(50908026);中国博士后特别资助项目(200902541)

摘　　要：对冻融0、50、100、150、200、250、300次后的湿筛混凝土试件进行-0.05∶1、-0.1∶1、-0.25∶1、-0.5∶1和0五个应力比的双轴拉-压强度试验,观察了试件的破坏形态,并测得试件的极限抗压强度,分析了极限抗压强度和抗拉强度随冻融循环次数和应力比的变化规律,为寒冷地区处于双轴拉压荷载作用下的水工混凝土结构强度分析提供设计和理论依据。The experimental study of the strength of wet-screened aggregate concrete are carded out under biaxial tensin-compression stress ra- tios, -0.05：1, -0.1：1,-0.25：1,-0.5：1 and 0 atter 0,50,100,150,200,250,300 cycles of freeze-thaw using the static and dynamic tri-axial experi- mental machine.The failure modes of specimens are reported.Based on the test data, the influence of freeze-thaw cycles, compressive stress ratio on the ultimate compressive and tensile strength are analyzed respectively.The relationships between the ultimate compressive strength and freeze-thaw cycles, the stress ratios are given also.They can serve as a reference for maintenance, design and life prediction of ocean structures, hy- draulic structures, marine structures and offshore platform in cold regions.

关 键 词：湿筛混凝土 冻融循环 双轴拉压 应力比 

分 类 号：TU528.01[建筑科学—建筑技术科学]