多因素作用下大型渡槽结构应力和变形规律研究  

Study on the Stress and Deformation Law of Aqueduct Structure under Multi-factor Coupling

作　　者：翟东辉 常周梅 

机构地区：[1]河南省水利勘测设计研究有限公司,郑州450016 [2]青海民族大学交通与工程系,西宁810007

出　　处：《水利科技与经济》2017年第1期1-9,共9页Water Conservancy Science and Technology and Economy

基　　金：青海民族大学校级理工自然科学项目青年项目(2015XJZ22)

摘　　要：针对我国西部大中型灌区渡槽结构不仅受到碳化、侵蚀、干湿循环等多种环境因素的破坏作用,还会受到自重、设计水位、人群荷载、风荷载等多种荷载影响的危害问题,以工程实例为研究对象,采用大型数值分析软件ANSYS对渡槽结构耦合破坏前后进行了计算和分析,得出了渡槽结构在不同工况下的应力和变形规律。研究表明,在各种工况条件下,耦合作用对渡槽结构的应力和位移影响较小,使第一主应力受压区最大值增加1.57%,位于槽身边端底部与支座接触的渡槽结构部位X方向位移最大值增加12.30%;对排架部位破坏位移的影响很大,使破坏部位X方向位移最大值增加96.33%。研究成果为渡槽结构优化设计及运行过程中的使用维护提供理论依据,也为水工混凝土结构耐久性能研究提供参考。Aqueduct structure of medium-sized irrigation area in western where are not only subjected to damage under carbonation,sulfate attack and dry-wet cycles,but are affected by gravity itself,design water level,the crowd,wind and other environmental factors. With an engineering example as the research object,the large-scale numeric analysis software ANSYS was used to calculate and analyze the aqueduct bent structure before and after the multi-phase rupture destructive action,and the law of stress and deformation were obtained for the aqueduct bent structure under the different working conditions. The analysis results show that：under the different working conditions,coupling effect of a smaller effect on the stress and displacement of the aqueduct structure makes the first principal stress maximum compressive zone increased by 1. 57%,located at the base of the groove side parts contact with the support of the aqueduct structure X direction maximum displacement increases by 12. 30%; There were a great i MPact on bent failure spots of displacement,which X direction maximum damage areas increased by 96. 33%. Research results will provide a reference for theoretical foundation for the aqueduct structure optimization design and maintenance in operation process,and provide research paradigm on durability of hydraulic concrete structure.

关 键 词：渡槽结构 多因素作用 ANSYS分析 应力 位移变形 

分 类 号：TV675[水利工程—水利水电工程]