我国渡槽结构典型破坏特征研究综述  

Review of typical failure characteristics of aqueduct structures in China

作　　者：顾培英[1,2] 王岚岚[1,2] 邓昌[1,2] 汤雷[1,2] 

机构地区：[1]南京水利科学研究院材料结构研究所,江苏南京210029 [2]水利部水科学与水工程重点实验室,江苏南京210029

出　　处：《水利水电科技进展》2017年第5期1-8,共8页Advances in Science and Technology of Water Resources

基　　金：国家重点研发计划(2016YFC0401807)

摘　　要：为合理模拟渡槽损伤,客观评价渡槽结构安全,依据渡槽破坏实例,结合他人数值仿真、模型试验研究成果,归纳总结渡槽地震、风致、水毁、耐久性典型破坏特征。重点分析简支梁式渡槽桩基、支撑结构、槽身可能破坏模式。结果表明:桩基存在土体支承不足、桩身抗压能力不足、桩顶位移超限破坏模式;墩底易发生弯曲或剪切破坏,牛腿易剪切破坏,排架柱两端、连梁节点附近易破坏;槽身纵梁可能发生弯曲、剪切、弯剪组合失效,端横梁易损伤,底板跨中及两端、侧墙与肋板底部、上部拉杆易开裂;渡槽还存在开裂、碳化、剥落剥蚀、渗漏、钢筋锈蚀、接缝止水等耐久性破坏。In order to simulate the aqueduct damage and evaluate the structure safety in a reasonable way,aqueduct failure characteristics were summarized and analyzed based on failure living examples existing research results of numerical simulations and model tests.The typical failure characteristics of aqueducts caused by earthquake,high wind,flood and durability were summarized.The possible failure modes of the pile foundation,the support structure and the aqueduct body for aqueduct structures of simple supported beam typeswere mainly analyzed.Firstly,the failure modes of the pile foundation includes three types,insufficientsoilbearing,insufficient compression strength of the pile and the displacement of the pile tip exceeding limitingvalues.Secondly,bending or shear failure may occur at the pier-bottom.Shear failure may occur at the corbel.Failures tend to occur at the ends of a bent fame column and around the joints of a coupling beam.Thirdly,failure types of bending,shear or shear-bending may occur at the longitudinal beam.The end floor beams,the mid-span and ends of a bottom plate,the bottom of side walls,the bottom of rib plates and the upper tie bars are easy to be damaged.Furthermore,there are many durabilitydamages,such as cracks,concrete carbonation, concrete scaling,leakage,reinforcement corrosion and seal damage.

关 键 词：渡槽结构 破坏特征分析 破坏模式 简支梁 综述 

分 类 号：S277[农业科学—农业水土工程]