高层建筑减震与模态分析
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摘要
为了研究高层建筑隔震结构对高层建筑抗震能力的作用,应用Ansys有限元软件对固定高层建筑和隔震高层建筑进行了模态分析。研究结果显示,结构的固有频率随着阶数的增大而增大;隔震结构的隔震层消耗了大量的隔振能量;通过在建筑物上部结构与基础间设置足够安全可靠的隔震系统,形成柔性底层,使建筑物与基础隔开,以延长整个结构体系的自振周期。减少输出上部结构的地震能量,从而大幅度降低建筑物对地震的影响;隔振节点加速度明显降低;隔震后位移发生微小的减少。由模拟结果可知,地震破坏以水平破坏为主,震烈度决定了建筑物的破坏程度;隔震层吸收了地震中大量的能量,隔震上部结构绝对加速度明显降低,基础隔震体系能够降低结构的水平地震作用。
In order to research the high-rise building isolation structure of a high-rise building aseismic capacity role ansys finite element software,to fixed high-rise buildings and isolated high-rise building the modal analysis.The results showed that the natural frequency of the structure with the increase of the order number increases;Isolation structure of isolation layer uses of a lot of vibration isolation energy;Through the upper structure and foundation in building between has enough safe and reliable set of isolation system,form,make the building and the flexible bottom separated,in order to prolong the foundation of structural system of the natural vibration period.Reduce the upper structure of the earthquake energy output,so as to reduce the ring buildings;Vibration isolation node acceleration obviously decrease;After an earthquake happened between the displacement of the tiny reduction.The simulation results indicate that the seismic damage to the horizontal seismic damage is given priority to,the building must decide intensity damage;Isolation layer absorption in the large amounts of energy,isolation upper structure absolute acceleration is reduced and base isolation system can reduce the level of structure the earthquake action.
In order to research the high-rise building isolation structure of a high-rise building aseismic capacity role ansys finite element software,to fixed high-rise buildings and isolated high-rise building the modal analysis.The results showed that the natural frequency of the structure with the increase of the order number increases;Isolation structure of isolation layer uses of a lot of vibration isolation energy;Through the upper structure and foundation in building between has enough safe and reliable set of isolation system,form,make the building and the flexible bottom separated,in order to prolong the foundation of structural system of the natural vibration period.Reduce the upper structure of the earthquake energy output,so as to reduce the ring buildings;Vibration isolation node acceleration obviously decrease;After an earthquake happened between the displacement of the tiny reduction.The simulation results indicate that the seismic damage to the horizontal seismic damage is given priority to,the building must decide intensity damage;Isolation layer absorption in the large amounts of energy,isolation upper structure absolute acceleration is reduced and base isolation system can reduce the level of structure the earthquake action.
引文
[1]朱镜清.结构抗震分析原理[M].北京:地震出版社,2002.
[2]张安安.基础隔震结构隔震系统的参数优化研究.[D].西安:建筑科技大学硕士学位论文,2001.
[3]李围.ANSYS土木工程应用实例[M].北京:中国水利水电出版社,2006.
[4]R.W.Clough,and J.Penzien.Dynamics of Struc-tures[M].New York:McGraw.Hill,1993.
[2]张安安.基础隔震结构隔震系统的参数优化研究.[D].西安:建筑科技大学硕士学位论文,2001.
[3]李围.ANSYS土木工程应用实例[M].北京:中国水利水电出版社,2006.
[4]R.W.Clough,and J.Penzien.Dynamics of Struc-tures[M].New York:McGraw.Hill,1993.
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