考虑钢筋滑移效应的高压隧洞衬砌配筋计算方法  

On the Reinforcement Calculation of High-pressure Tunnel Lining considering the Slip Effect of Reinforcement

作　　者：兰伟钦 肖明[1,2] LAN Weiqin;XIAO Ming(State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering (Wuhan University), Ministry of Education, Wuhan 430072, China)

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]武汉大学水工岩石力学教育部重点实验室,湖北武汉430072

出　　处：《水电与新能源》2021年第4期66-71,共6页Hydropower and New Energy

基　　金：国家自然科学基金资助项目(52079097)。

摘　　要：在高压水工隧洞混凝土衬砌限裂配筋计算中,为获得满足限裂要求又经济合理的配筋方案,基于三维损伤有限元,采用钢筋混凝土组合力学模式,引入混凝土弹性损伤模型,建立考虑钢筋滑移效应的应力迭代计算方法,根据水工隧洞衬砌限裂设计原则确定配筋计算流程。将此方法应用于鲁地拉水电站引水隧洞的配筋计算表明,钢筋应力及配筋面积与实际较为吻合。It is important to get an economic and rational reinforcement scheme that also fulfills the crack prevention requirement for the concrete lining of high-pressure hydraulic tunnel.Based on the three-dimensional damage finite element method,a reinforcement calculation scheme of hydraulic tunnel lining considering the slip effect of reinforcement is proposed,in which the composite mechanical mode is adopted for the reinforced concrete and the elastic damage model of concrete is introduced.An iterative stress calculation method considering the slip effect of reinforcement is established and a reinforcement calculation process is proposed according to the crack prevention design principles for hydraulic tunnel lining.Application of the proposed method in the design of the water diversion tunnel in Ludila Hydropower Station shows that the calculated reinforcement stress and reinforcement area are comparatively consistent with the actual situation.

关 键 词：粘结滑移 混凝土损伤 水工隧洞衬砌 限裂配筋设计 

分 类 号：TV314[水利工程—水工结构工程]