碎石混凝土与卵石混凝土双向拉伸强度研究  

Study on the biaxial tension strength of pebble concrete and gravelly concrete

作　　者：陈积光[1] 肖四喜[1] 曾文德[1] 罗军[2] 李冈陵[3] 

机构地区：[1]湖南理工学院,湖南岳阳414000 [2]岳阳市公路桥梁基建总公司,湖南岳阳414000 [3]华南理工大学,广东广州510641

出　　处：《混凝土》2007年第8期61-64,共4页Concrete

基　　金：湖南省自然科学基金项目(2004JJ40039)

摘　　要：通过试验研究证明,破碎工艺能改善卵石混凝土的抗压和抗拉强度,对抗压强度的改善程度在10%以内,而对抗拉强度的改善程度可达20%。混凝土的双向拉伸强度比单向拉伸强度还要低20%～30%左右,表现为双向拉伸弱化效应。这对复杂荷载应力作用下的大跨度梁及板壳结构设计来说,是一个重要的值得深入研究的课题。In researching of experiment,this study prove that that fragmentized technology can improve the compressive and tensile strength of pebble concrete.The effect of its compressive strength is inside 10%, however, it reaches 20% for the tensile strength;the concrete＇s strength under the biaxial tension is also 20%-30% lower than its uniaxial tensile strength, therefore,it is putting up the biaxial tension weakening effect.This is an important and worthy of researching problem for the large span girder, plate and shell structures which are under the complicated load.

关 键 词：卵石混凝土 碎石混凝土 拉伸强度 弱化效应 

分 类 号：TU528.041[建筑科学—建筑技术科学]