型钢混凝土框排架混合结构弹塑性地震响应及抗震防线问题研究

发布时间：2018-07-14 16:05

【摘要】：型钢混凝土框排架混合结构是一种新型的火电厂主厂房结构体系,合理的剪力墙布置能够使该类结构实现三道抗震防线。采用ABAQUS有限元软件进行8度小震、中震、大震以及9度大震下的弹塑性地震反应分析,获得结构在不同强度地震下的基底剪力、整体侧移、层间侧移角以及结构构件的损伤演化特性。研究结果表明:强震作用下剪力墙首先出现损伤破坏,可以起到第一道抗震防线的作用,有效提高了结构的抗震能力;随着地震作用的增强,结构薄弱部位由煤斗层到运转层再到底部两层下移,且整体侧移曲线由弯剪型向剪切型转变;整体结构的变形性能较好,能够满足"大震不倒"的抗震设防需求。最后,通过计算分析提出适用于不同烈度、不同场地类别下的剪力墙布置数量与抗震构造措施,可供工程设计参考。
[Abstract]:Steel reinforced concrete frame bent composite structure is a new type of power plant structure system. Reasonable shear wall arrangement can make this kind of structure achieve three seismic defense lines. Abaqus finite element software is used to analyze the elastoplastic seismic responses of 8 small, medium, large and 9 strong earthquakes. The shear force of the base of the structure under different intensity earthquakes is obtained, and the whole lateral displacement of the structure is obtained. The lateral displacement angle between layers and the damage evolution characteristics of structural members. The results show that the shear wall first appears damage and damage under strong earthquake, which can play the role of the first line of seismic defense, effectively improve the seismic capacity of the structure, with the increase of earthquake action, The weak part of the structure moves down from the coal hopper layer to the operating layer and then to the bottom layer, and the overall lateral displacement curve changes from the bending and shear type to the shear type, and the deformation performance of the whole structure is better, which can meet the seismic fortification requirement of "strong earthquake does not collapse". Finally, through calculation and analysis, the quantity of shear wall arrangement and seismic construction measures suitable for different intensity and different site types are put forward, which can be used as a reference for engineering design.
【作者单位】：西安建筑科技大学土木工程学院;双良节能系统股份有限公司;西安科技大学建筑与土木工程学院;
【基金】：国家自然科学基金项目(51178383)
【分类号】：TU398.9

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