微平面理论在混凝土保护层破坏模式分析中的应用  

Application of micro-plane theory to analysis of failure modes of concrete covers

作　　者：范兴朗[1] 丁建江 郑建军[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310032 [2]浙江交通投资集团,浙江杭州310014

出　　处：《水利水电科技进展》2010年第5期37-40,共4页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(50878196);浙江省自然科学基金(Y107638)

摘　　要：应用微平面理论分析混凝土保护层的破坏模式。首先总结了微平面理论的基本公式,然后将微平面理论与有限单元法相结合,分析在锈胀力作用下混凝土保护层的开裂全过程。通过与文献中的实验数据比较,验证了本文数值方法的有效性。此外,分析了钢筋直径、钢筋间距和保护层厚度对保护层破坏模式的影响。The failure modes of concrete covers were analyzed by use of the micro-plane theory.The basic formulae of the micro-plane theory were summarized.By combining the micro-plane theory with the finite element method,the whole cracking process of the concrete covers under corrosion expansive pressure was discussed.A comparison between the present results and the experimental data from literatures verified the validity of the proposed numerical method.In addition,the influences of the diameter and spacing of reinforcing steel bars and the thickness of covers on the failure modes of the concrete covers were evaluated.

关 键 词：混凝土结构 微平面理论 有限单元法 破坏模式 

分 类 号：TU375[建筑科学—结构工程] TV431[水利工程—水工结构工程]