混凝土Ⅰ型裂缝随机损伤断裂分析研究  

Research on stochastic damage and fracture for modeⅠcrack of concrete

作　　者：程道辉 王苗 卿龙邦 苏怡萌 CHENG Daohui;WANG Miao;QING Longbang;SU Yimeng(Tianjin Underground Railway Group Co.,Ltd.,Tianjin 300392,China;School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]天津市地下铁道集团有限公司,天津300392 [2]河北工业大学土木与交通学院,天津300401

出　　处：《混凝土》2020年第11期40-42,56,共4页Concrete

基　　金：国家自然科学基金资助项目(51779069,51309073)。

摘　　要：基于并联弹簧随机损伤模型,结合随机损伤与断裂力学,推导了混凝土Ⅰ型裂缝尖端附近的随机损伤场。通过对损伤场分析,确定了完全损伤区的离散范围,计算了相应的损伤面面积及裂缝稳定扩展长度,将计算结果与现有试验结果进行了对比。结果表明:计算的随机损伤面与现有方法计算结果吻合良好,试验得到的裂缝扩展长度在计算得到的随机裂缝扩展长度范围内。Based on the parallel spring stochastic damage model,combined with stochastic damage and fracture mechanics,the stochastic damage field near the crack tip of modeⅠcrack was obtained.Through the analysis of the damage field,the discrete range of the completely damaged area was determined.The corresponding damage surface area and the crack stability extension length were calculated,and the calculated results are compared with the existing test results.The results show that the random damage surface calculated by the method is in good agreement with the results calculated by the existing method,and the fracture extension length obtained by the test is within the range of the random fracture extension length calculated by this test.

关 键 词：混凝土 随机损伤 断裂力学 Ⅰ型裂缝 

分 类 号：TU528.01[建筑科学—建筑技术科学]