摘要
以宁夏七星渠新清水河渡槽为研究对象,采用有限元软件Sap2000,建立了拱式渡槽的三维有限元模型。考虑自重和地震等外荷载对渡槽的影响,采用反应谱法,分析渡槽动力情况下的强度、刚度以及结构整体稳定的情况。结果表明,渡槽在地震工况下拱圈梁承载力满足规范要求,拱顶排架柱根部出现最大破坏弯矩,排架柱顺桥向斜截面受剪承载力不足。根据计算结果,提出了修补建议,为之后的全面除险加固提供了设计依据。
Taking the Xinqingshuihe aqueduct of Qixing canal in Ningxia as the research object,the three-dimensional finite element model of arch aqueduct is established by using the finite element software Sap2000.In view of the influence of external loads such as self-weight and earthquake on the aqueduct,the response spectrum method is used to analyze the strength and stiffness of the aqueduct under dynamic conditions and the overall stability of the structure.The results show that the bearing capacity of the arch ring beam of the aqueduct meets the requirements of the specification under the seismic conditions,the maximum failure bending moment appears at the root of the arch bent column,and the shear bearing capacity of the bent column along the bridge′s diagonal section is insufficient.According to the calculation results,repair suggestions are put forward to provide design basis for the subsequent comprehensive risk elimination and reinforcement.
作者
韩璇
赵妍
刘佳特
吕小彬
肖俊
王荣鲁
HAN Xuan;ZHAO Yan;LIU Jiate;LV Xiaobin;XIAO Jun;WANG Ronglu(Ningxia Water Conservancy Project Quota and Quality Safety Center,Yinchuan 750004,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Beijing water impact evaluation center,Beijing 100161,China)
出处
《华北水利水电大学学报（自然科学版）》
北大核心
2021年第4期99-103,共5页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
国家重点研发计划项目(2018YFC0407103)
宁夏回族自治区水利科技项目(HSP/GQ-KY-01)。
