集中荷载下新型带斜支撑型钢混凝土框架结构受力性能  

Mechanical Performance of a Novel Steel Concrete Frame Structure with Inclined Supports under Concentrated Load

作　　者：胡智敏[1] 陈伟[1] 毛启元 Hu Zhimin;Chen Wei;Mao Qiyuan(Guangdong Architectural Design and Research Institute Group Co.,Ltd.,Guangzhou 510010,China)

机构地区：[1]广东省建筑设计研究院集团股份有限公司,广州510010

出　　处：《特种结构》2024年第6期1-5,共5页Special Structures

摘　　要：为解决常规地下空间转换结构尺寸大、设计施工困难的难题,提出一种自重轻、截面小、跨越能力大的新型带斜支撑型钢混凝土框架结构(简称新型结构)作为大跨度地下空间的转换结构。通过midas有限元软件分析新型结构在集中荷载下的受力模式,并与常规无斜支撑框架结构对比,结果表明:新型结构梁正、负弯矩分别降低72%、17%,柱外侧弯矩降低20%;新型结构斜支撑内侧梁、柱轴力和剪力与斜支撑布置有关;新型结构梁挠度降低33%,柱侧向变形增加20%。经济性分析表明:相比常规结构型钢混凝土转换梁,新型结构转换梁可降低自重27%,节约钢材10%,综合造价降低约10%,具有良好的经济效益。In order to solve the problems of large size,difficult design and construction of conventional underground space conversion structure,a novel steel concrete frame structure with inclined support which has light weight,small section and large span capacity was proposed as a long-span underground space conversion structure.The finite element software Midas was used to analyze the stress mode of the new structure under concentrated load.And the results showed that the positive and negative bending moments of the new structure were reduced by 72%and 17%respectively,and the outside bending moments of the column were reduced by 20%.The axial force and shear force of the inner beam and column of the new structure were related to the layout of the inclined support.The deflection of the beam of the new structure was reduced by 33%and the lateral deformation of the column was increased by 20%.The economic analysis showed that compared with the conventional structural steel concrete transfer beam,the new structural transfer beam could reduce the dead weight by 27%,save steel by 10%,and reduce the comprehensive cost by about 10%,which has good economic benefits.

关 键 词：地下空间 转换结构 型钢混凝土框架结构 斜支撑 受力性能 有限元分析 

分 类 号：TU398.2[建筑科学—结构工程]