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电厂中煤斗一般布置在框架结构的中上部,煤斗自重和煤质量很大,地震时会产生很大的地震力,造成结构梁、柱截面较大,经济性较差.如果煤斗支座处设置隔震装置,可以减小地震作用,减小梁、柱截面,满足抗震要求.首先通过Midas有限元软件分别建立传统的框架结构模型和设置隔震支座后的框架结构模型,然后对这两种框架结构模型进行地震反应谱分析,最后分别对两种模型在地震作用下的位移、内力、应力和周期进行对比分析.计算分析表明:设置隔震支座后的框架结构地震作用明显减小,框架梁、柱截面明显减小,减少工程造价,并且其在地震作用下的位移、内力、应力和周期均满足设计规范要求.
The coal hopper in the power plant is generally arranged in the middle and upper part of the frame structure. The self-weight of the coal hopper and the quality of the coal are great, and great earthquake force will be generated during the earthquake, resulting in larger section of the structure beam and column and poor economy. The isolation device installed at the base can reduce the seismic effect and reduce the cross section of the beam and column to meet the seismic requirements.Firstly, the traditional frame structure model and the frame structure model after the isolation bearing are established respectively by using the finite element software Midas, Seismic response spectrum analysis of the two frame structure models is carried out, and finally the displacement, internal force, stress and period of the two models under the action of earthquake are analyzed respectively.Computational analysis shows that the seismic response of the frame structure after the isolation bearing is set It is obviously reduced that the beam and column sections of the frame are obviously reduced, the construction cost is reduced, and the displacement, internal force, stress and period of the earthquake satisfy the design specifications.