大型钢筋混凝土预应力蜗壳的设计研究  

Large Scale Pre-stressed Concrete Spiral Case Design

作　　者：王仕民 王常义 张殿双 张宏战[3] 王溢波[3] WANG Shimin;WANG Changyi;ZHANG Dianshuang;ZHANG Hongzhan;WANG Yibo(Guangxi Datengxia Water Conservancy Development Co. Ltd. , Nanning, Guangxi 530028, China;China Water Northeastern Investigation, Design & Research Co. Ltd. , Changchun, Jilin 130021, China;School of Hydraulic Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China)

机构地区：[1]广西大藤峡水利枢纽开发有限责任公司,广西南宁530028 [2]中水东北勘测设计研究院有限公司,吉林长春130021 [3]大连理工大学水利工程学院,辽宁大连116024

出　　处：《水利与建筑工程学报》2018年第1期66-71,共6页Journal of Water Resources and Architectural Engineering

摘　　要：以某大型水电站工程为研究实例,对大尺度钢筋混凝土蜗壳采用预应力锚索加固的结构形式进行了数值模拟和试验研究。首先采用三维有限单元法进行了线弹性和非线性分析,研究了蜗壳结构的应力分布和开裂状态,据此拟定了钢筋和预应力锚索的布置方案,进而进行了施加预应力后的结构分析。在此基础上,开展了仿真材料蜗壳结构模型试验,揭示和验证钢筋混凝土蜗壳的受力状态和裂缝控制效果,论证了施加预应力的必要性和有效性,为工程设计提供了可靠的技术支撑。In this paper,the spiral case of a practical hydropower station was taken as an example and the numerical and experimental research works were finished.Based on linear and nonlinear numerical analysis,the reinforcement arrange-ment was decided.It is concluded that the pre-stressed measures was necessary.The model experiment was developed and the strain of the steel bar and concrete were measured and the crack^s distribution were observed.The results indi-cate that with the pre-stressing measure on the key parts of the concrete spiral case,the tensile stress level could be re-duced,the crack development could be limited and the seepage could be prevented.

关 键 词：水电站 蜗壳 钢筋混凝土 预应力 裂缝 

分 类 号：TV332[水利工程—水工结构工程]