转换层刚接和铰接对结构抗震性能的影响
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摘要
对某制氢化工厂厂房转换层进行刚接和铰接工况下的地震反应谱对比分析。结果表明,转换层分别采用铰接和刚接方案时,结构的动力特性规律基本一致,但铰接比刚接的刚度略低,使得结构的基本周期变长,抗震性能略微下降;铰接方案对转换层位移影响较大,该方案使转换层及底层混凝土柱子的剪力和弯矩减小,部分柱子轴力略有提高,改善了其受力性能。
Seismic spectrum research was carried out of the transfer floor in a certain hydrogen chemical plant with rigid joints and pinned joints.The results show that,when rigid joints and pinned joints are used,respectively,the structure has the same dynamic properties yet its rigidity is a bit smaller with the use of rigid joints,which results in the longer fundamental period and poorer aseismatic performance of the structure.It is also found that pinned joints has a great influence on the displacement of the transfer floor,reducing the shearing force and bending moment of the transfer floor and the ground floor concrete pillars,raising the axial force of some pillars,and improving their mechanical performance.
Seismic spectrum research was carried out of the transfer floor in a certain hydrogen chemical plant with rigid joints and pinned joints.The results show that,when rigid joints and pinned joints are used,respectively,the structure has the same dynamic properties yet its rigidity is a bit smaller with the use of rigid joints,which results in the longer fundamental period and poorer aseismatic performance of the structure.It is also found that pinned joints has a great influence on the displacement of the transfer floor,reducing the shearing force and bending moment of the transfer floor and the ground floor concrete pillars,raising the axial force of some pillars,and improving their mechanical performance.
引文
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三峡大学学报:自然科学版,2004,26(6):520-523.
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三峡大学学报:自然科学版,2004,26(6):520-523.
[2]蔡元奇,韩芳,朱以文.场地卓越周期与结构基本周期关系研究[J].地震工程与工程振动,2004,24(4):70-74.
[3]俞盛锷.化工厂结构设计中若干问题的探讨[J].上海化工,2002,10(11):24-26.
[4]李杰,陈淮,孙增寿,等.工业结构-设备体系在地震作用下的动力相互作用研究[J].地震工程与工程振动,1997,17(2):98-105.
[5]孙增寿,陈淮,李杰.结构-设备复合系统振动特性研究[J].工业建筑,1997,27(2):20-24.
[6]朱镜清.结构抗震分析原理[M].北京:地震出版社,2002:85-90.
[7]李培林.建筑抗震与结构选型构造[M].北京:中国建筑工业出版社,1990:95-98.
[8]邹经湘,王本利,王世忠,等.结构动力学[M].哈尔滨:哈尔滨工业大学出版社,1996:50-53.
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