杨小乐,陶桂兰.基于三维粘弹性边界的升船机塔柱结构地震响应分析[J].水电能源科学,2018,36(6):88-91
基于三维粘弹性边界的升船机塔柱结构地震响应分析
Seismic Response Analysis of Ship Lift Tower Structure Based on Three dimensional Viscoelastic Boundary
  
DOI:
中文关键词:  塔柱结构  粘弹性人工边界  无质量地基  地震响应
英文关键词:tower structure  viscoelastic artificial boundary  mass less base  seismic response
基金项目:国家重点研发计划(2016YFC0402002)
作者单位
杨小乐,陶桂兰 河海大学 港口海岸与近海工程学院 江苏 南京 210098 
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中文摘要:
      以金沙江下游支流上某拟建升船机塔柱结构为例,通过ABAQUS有限元软件,采用编写的计算程序实现了三维粘弹性边界及地震动输入,并通过算例验证了所提方法的正确性。采用考虑无限地基辐射阻尼的三维粘弹性人工边界模型及无质量地基模型,分析了高扬程大型升船机塔柱结构在横河向及顺河向7度地震作用下的动力响应。结果表明,塔柱结构顶部横河向位移大于顺河向;塔柱筒体与筏形基础接触面出现应力集中现象,承受较大的压应力,筏形基础顶部中间部分两端承受较大的拉应力;与无质量地基模型计算的动力响应相比,粘弹性人工边界模型计算的塔柱结构动力响应相对较小。
英文摘要:
      A proposed ship lift tower structure located on the branch of lower reaches of Jinshajiang River was taken as the research object. The proposed program for realizing the 3D viscoelastic boundary and ground motion input was utilized on the finite element software ABAQUS. The reliability of this method was validated by examples. Considering the infinite foundation radiation damping, seismic dynamic response of a high lift large ship lift tower structure across and along the river in level 7 earthquake excitation was analyzed by using three dimensional viscoelastic artificial boundary model and mass less base model. The results show that the displacement across the river on the top of tower structure is greater than that along the river; The surface between the tower column and the raft foundation appears stress concentration with high compressive stress, and the both ends on the top middle part of raft foundation are under high tensile stress. The dynamic response of tower structure calculated by viscoelastic artificial boundary model is less than that of mass less foundation model.
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