论文部分内容阅读
从弹性力学理论出发,借鉴地面钢筋混凝土结构中构件锈胀开裂的研究成果,并考虑地下锚固环境受围岩及初始地应力影响的特殊情况,引入围岩初始应力影响系数以及围岩初始应力影响函数两个变量,对锚杆锈蚀导致砂浆保护层开裂的过程进行了分析。研究结果表明围岩初始应力对砂浆保护层的最大开裂半径起着控制作用,当围岩初始应力超过某一临界值时,砂浆内部裂缝会稳定扩展到砂浆外表面,而当围岩初始应力低于这个值时,砂浆内部裂纹最大稳定扩展半径随应力的增加近似按线性关系变化。针对理论结果,采用有限元分析方法对其进行了验证,验证结果表明二者吻合很好。
Based on the theory of elastic mechanics, the research results of corrosive cracking of members in reinforced concrete structures are taken into account. Considering the special circumstances that underground anchoring environment is affected by surrounding rock and initial stress, the influences of initial stress of surrounding rock and initial stress of surrounding rock are introduced Function of two variables, corrosion of the mortar protective layer caused by cracking of the process were analyzed. The results show that the initial stress of surrounding rock plays a controlling role in the maximum cracking radius of mortar protective layer. When the initial stress of surrounding rock exceeds a certain critical value, the internal cracks in mortar will steadily extend to the outer surface of mortar. When the initial stress of surrounding rock is low At this value, the maximum stable expansion radius of cracks in the mortar changes approximately linearly with increasing stress. According to the theoretical results, the finite element analysis method is used to verify the results. The verification results show that the two agree well with each other.