新型框排架结构多维地震反应分析
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摘要
现行框排架结构主厂房设计中仍保留了用横向单榀平面模型进行拟静力分析设计的传统方法,结构设计的准确性和可靠度相比于三维计算模型的动力分析偏差较大,正确的力学模型与合理的空间整体分析方法是精确设计的前提。以某型钢混凝土柱-钢筋混凝土分散剪力墙框排架结构为原型建三维杆系有限元模型,通过对比框排架结构在单双向主轴加载、角度变换加载及扭转平动一致激励下结构动力反应的差异,着重阐述了此类大型不规则工业建筑在进行多维时程分析时加载制度对其分析结果的影响。
The existing frame-bent structure of the main plant design still retains the single piece model with horizontal plane quasi-static analysis and design of the traditional methods.The mechanical model of the correct and reasonable space for the overall analysis method is the premise of accurate design.A 1000MW steel reinforced concrete columns-reinforced concrete shear wall frame bent decentralized prototype built for the three-dimensional finite element model of pole.By comparing the different dynamic response of the frame-bent structure with dynamic loads in two-way spindle direction,transforming angle direction and uniform three-dimensional excitation,some useful conclusions received on impact of the multi-dimensional time-history analysis results of such large-scale irregular industrial construction by different loading ways.
The existing frame-bent structure of the main plant design still retains the single piece model with horizontal plane quasi-static analysis and design of the traditional methods.The mechanical model of the correct and reasonable space for the overall analysis method is the premise of accurate design.A 1000MW steel reinforced concrete columns-reinforced concrete shear wall frame bent decentralized prototype built for the three-dimensional finite element model of pole.By comparing the different dynamic response of the frame-bent structure with dynamic loads in two-way spindle direction,transforming angle direction and uniform three-dimensional excitation,some useful conclusions received on impact of the multi-dimensional time-history analysis results of such large-scale irregular industrial construction by different loading ways.
引文
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[2]孙士军,陈国兴.地面运动转动分量的合成方法[J].地震学刊,1998(1):19-24.
[3]张誉,王卫.双向地震作用下不规则框架的扭转分析[J].土木工程学报,1994(5):37-51.
[4]Luco J E.Torsional response of structures for SH wave.Earth-quake[J].Engineering and Structural Dynamics,1976,4(2).
[5]白国良,安建利,陈亮.大型火力发电厂主厂房钢筋混凝土框排架结构空间地震反应分析[J].工程抗震与加固改造,2006,10(28):25-28.
[6]王耀伟,黄宗明.影响偏心结构地震反应的因素综述[J].防灾减灾工程学报,2004,24(1):112-116.
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