海南牛路岭灌区工程高大跨度拱式渡槽抗震性能分析  

Seismic performance and stability analysis of long-span arch aqueduct of Niululing irrigation project in Hainan Province

作　　者：陈家东 林明标[1] 陈积瞻 祁勇峰[2] CHEN Jiadong;LIN Mingbiao;CHEN Jizhan;QI Yongfeng(HaiNan Province Water Conservancy and Hydropower Survey,Design and Research Institute Co.,Ltd.,Haikou 570203,China;Material and Engineering Structure Department,Changjiang Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]海南省水利水电勘测设计研究院有限公司,海南海口570203 [2]长江科学院材料与结构研究所,湖北武汉430010

出　　处：《水利水电快报》2022年第9期35-39,48,共6页Express Water Resources & Hydropower Information

基　　金：国家自然科学基金资助项目(51779019)。

摘　　要：高大跨度拱式渡槽因其跨越能力大、整体性强且能适应复杂多变的地形而日益广为采用,但是大输水流量设计使得其结构头重脚轻的特点更加明显,对地震作用、风荷载及结构自身的变形更为敏感,结构强度和稳定性问题尤为突出。结合牛路岭灌区跨径106 m的高大跨径拱式渡槽工程实际,通过建立整体有限元模型,对渡槽动力特性、地震响应和不同施工阶段进行了结构稳定分析。结果表明:槽身、拱圈受力状态良好,拱座处高墩架下部为刚度薄弱、局部易开裂、失稳的部位,在渡槽设计中应予以重视;结构整体强度和稳定性满足相关规范要求。研究成果可为类似工程设计和渡槽类设计规范细则的制定提供参考。Long-span arch aqueduct is widely used because of its long-span capacity, strong integrity and adaptability to complex and changeable terrain.However, the design of large flow water delivery makes its structure top-heavy, which is more sensitive to earthquake, wind load and structure deformation, so the problems of strength and stability for the structure are particularly prominent.Combined with a practical long-span arch aqueduct with a span of 106 m in Niululing irrigation area, the dynamic characteristics, seismic response and structural stability of the aqueduct in different construction stages are analyzed by establishing the overall finite element model.The results show that: the aqueduct body and arch are in good stress condition, but the lower part of high pier frame at arch seats are weak in stiffness and are easy to loss local stability, which should be paid attention in the aqueduct design;the overall strength and stability of the structure meet the requirements of relevant specifications.The research results can provide references for the design of similar projects and the formulation of aqueduct design specifications.

关 键 词：拱式渡槽 高大跨度 三维有限元 抗震稳定 牛路岭灌区 

分 类 号：TV672.3[水利工程—水利水电工程]