常规岛主厂房基于变形的抗震性能研究
Research on Deformation-based Seismic Design of Conventional Island Main Plant
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摘要:
为了确保工作人员安全的情况下同时保障常规岛主厂房内的贵重设备在大震情况下不至于遭受到较大的损失，常规岛主厂房的抗震设计要求应该采用更高标准，因此文章采用基于结构变形的抗震设计方法。针对常规岛主厂房的变形特点，在小震，中震和大震作用下，通过有限元软件SAP 2000进行静力弹塑性分析和动力时程分析。用SAP2000对常规岛主厂房整体结构进行建模时，设置了整体建模参数和结构分析系数，并按照《建筑抗震设计规范》要求选取了3条实际地震波和2条人工波，进行静力弹塑性分析和动力时程分析后获取了常规岛主厂房在不同地震水准作用下整体层间位移角。分析结果表明，常规岛主厂房结构整体在小震、中震以及大震作用下，不论是横向地震作用还是纵向地震作用下的层间位移角平均值远小于设定的整体层间位移角限值，符合预期设定变形目标要求。 Abstract:To ensure the safety of workers and protect the valuable equipment in conventional island main plant under the earthquake situation will not suffer a greater loss, seismic design requirements of conventional island main plant should adopt higher standards, the paper used the deformation-based seismic method. Aimed at the deformation characteristics of the conventional island main plant, proceed PUSHOVER analysis and dynamic time history analysis by the finite element software SAP2000 under small earthquake、moderate earthquake and severe earthquake.When modeling conventional island main plant whole structure by SAP 2000, set structure analysis coefficient and whole structure parameters, choose 3 actual seismic wave and 2 artificial seismic wave under the Code for seismic design of buildings requirement, then get the global story drift angle of conventional island main plant under the earthquake by PUSHOVER analysis and dynamic time history analysis.The result showed when the conventional island main plant whole structure under the force of small earthquake、moderate earthquake and severe earthquake, whether horizontal or vertical average of story drift angle is much smaller than pre set story drift angle limit, accord with the pre set deformation target.
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