考虑尺寸、边界效应和裂纹扩展的单向间隔诱导缝等效强度模型  

EQUIVALENT STRENGTH MODEL FOR UNILATER INTERVAL INDUCED JOINT BASED ON SIZE,BOUNDARY EFFECT AND CRACK PROPAGATION RULE

作　　者：张小刚[1] 王学志[2] 孙荣书[2] 

机构地区：[1]深圳大学土木工程学院,深圳市土木工程耐久性重点实验室,广东深圳518060 [2]辽宁工业大学土木建筑学院,辽宁锦州121001

出　　处：《工业建筑》2011年第6期88-91,42,共5页Industrial Construction

基　　金：国家自然科学基金(50709013,50908148);住房与城乡建设部研究开发项目(2009-K4-23,2010-11-33)

摘　　要：对失稳断裂韧度的尺寸、边界效应及有效裂纹扩展量开展深入探讨,研究不同尺寸非标准试件之间的失稳断裂韧度尺寸、边界效应和反映实际规律且具有实际物理意义的有效裂纹扩展量,基于上述讨论,建立考虑上述影响因素的单向间隔诱导缝等效强度模型,同试验结果对比发现,模型具有较好精度,可作为大体积混凝土单向间隔诱导缝等效强度的推荐公式。Unstable fracture toughness is used to analyze size,boundary effect and crack propagation of concrete.Both size effect,boundary effect formula for unstable fracture toughness and crack propagation formula with real physical meaning and realistic rule are presented.Based on which,formulas for predicting the equivalent strength of unilater interval induced joint are proposed,in which these coupling effects on the equivalent strength are considered.The comparisons of the predictions given by the present model with experimental data prove that the model of the paper is efficient and accurate.

关 键 词：单向间隔诱导缝 等效强度 尺寸效应 边界效应 有效裂纹扩展量 失稳断裂韧度 

分 类 号：TV33[水利工程—水工结构工程]