磷石膏墙体钢筋混凝土网格式框架结构动力反应数值分析
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摘要
磷石膏墙体钢筋混凝土网格式框架结构是在常规框架内再设置横梁和竖柱形成的一种新型结构体系,采用磷石膏作为此种结构墙体填充材料。采用空间杆-薄壁杆系有限元模型,并将网格式框架结构与框架结构、剪力墙结构进行动力反应数值分析对比。分析结果表明:框架结构刚度小,因地震波引起的楼层剪力、楼层弯矩较小;剪力墙结构刚度大,地震作用下产生的楼层剪力和楼层弯矩也较大;网格式框架结构自振周期、变形和地震反应力均介于框架结构和剪力墙结构之间。网格式框架结构通过减轻自重、调整自振特性克服框架结构和剪力墙结构的一些弱点,与框架结构相比提高了结构刚度、与剪力墙结构相比减轻结构自重,减小了结构的侧向变形与地震作用。
The RC grid frame structure with phosphogysum walls is a new type of innovative structural system,where a grid is set within the conventional beam-column frame,and the walls are made of industrial waste phosphogysum.Space thin-walled bar finite element model is adopted to analyze the dynamic response of this type of structure.The results show that: the stiffness of the frame structure is small,thus the inter-story shear force and bending moment caused by seismic ground motions are small;the stiffness of shear wall structure is large,thus the inter-story shear force and bending moment are large;the vibration period,deformation and internal forces of the grid frame structure are between the conventional frame structure and the shear wall structure.Through reducing the weight and adjusting the vibration characteristics,the grid frame structure can overcome the weakness of the conventional frame structure and shear wall structure achieving bigger structural rigidity than the frame structure and smaller weight than the shear wall structure,thus to reduce the seismic reponses of the structure.
The RC grid frame structure with phosphogysum walls is a new type of innovative structural system,where a grid is set within the conventional beam-column frame,and the walls are made of industrial waste phosphogysum.Space thin-walled bar finite element model is adopted to analyze the dynamic response of this type of structure.The results show that: the stiffness of the frame structure is small,thus the inter-story shear force and bending moment caused by seismic ground motions are small;the stiffness of shear wall structure is large,thus the inter-story shear force and bending moment are large;the vibration period,deformation and internal forces of the grid frame structure are between the conventional frame structure and the shear wall structure.Through reducing the weight and adjusting the vibration characteristics,the grid frame structure can overcome the weakness of the conventional frame structure and shear wall structure achieving bigger structural rigidity than the frame structure and smaller weight than the shear wall structure,thus to reduce the seismic reponses of the structure.
引文
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[3]马克俭,卢亚琴,张华刚,等.以磷石膏为模板的新型钢筋混凝土结构体系试验研究[J].建筑结构学报,2009,30(6):128-133.
[4]马克俭,高国富,张华刚,等.磷石膏在大开间灵活划分居室的住宅建筑中的综合应用可行性研究报告[R].贵阳:贵州大学空间结构研究中心,2007.
[5]JG J 3—2002高层建筑混凝土结构技术规程[S].
[6]GB 50010—2002混凝土结构设计规范[S].
[7]GB 50011—2001建筑抗震设计规范[S].
[8]中国建筑科学研究院PKPM CAD工程部.结构平面CAD软件[M].2005.
[9]中国建筑科学研究院PKPM CAD工程部.多层及高层建筑结构空间有限元分析与设计软件[M].2006.
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