两侧加劲钢板深梁弹性屈曲分析  

Elastic Buckling Analysis of Steel Plate Deep Beam with Stiffeners on Both Sides

作　　者：胡壹[1] 江力强 郑宏[1] HU Yi JIANG Liqiang ZHENG Hong(School of Civil Engineering, Chang＇an University, Xi＇an 710061, China School of Civil Engineering, Southeast University, Nanjing 210018, China)

机构地区：[1]长安大学建筑工程学院,西安710061 [2]东南大学土木工程学院,南京210018

出　　处：《建筑钢结构进展》2016年第6期19-24,共6页Progress in Steel Building Structures

基　　金：国家自然科学基金(50678025)

摘　　要：钢板深梁填充钢框架体系是一种新型的抗侧力结构体系,钢板深梁通过改变跨高比等参数不仅可以实现结构初始刚度能够在一定范围内调幅,而且使抗侧构件更容易安装或拆卸。以两侧加劲钢板深梁为研究对象,对其弹性屈曲性能进行了有限元分析,讨论不同加劲刚度对不同跨高比钢板深梁的加劲效果,并提出不同跨高比钢板深梁在加劲约束作用下的等效屈曲系数和嵌固系数。结果表明,跨高比越大,等效屈曲系数越小,实现屈曲模态转变所需加劲刚度越大,加劲效果越好。求得在屈曲模态转变点时,不同跨高比两侧加劲钢板深梁的加劲抗弯刚度比。提出对于跨高比在区间[0.5,1.0]的两侧加劲钢板深梁,嵌固系数可取1.23;对于跨高比在区间[1.0,2.0]时,嵌固系数取为1.0。分析结果为此类结构的抗侧设计提供了理论基础。Steel plate deep beam with steel frame（SDBF）is a new lateral resisting system.In this system,steel plate deep beam is used to adjust the initial stiffness of steel frame structure,so the lateral component can be easily assembled or removed.This paper studies the elastic buckling behavior of steel plate deep beam with two-side restraint（RSPDB）using finite element method（FEM）.A series of FEM analyses is conducted on the influence of stiffening rigidity to span-length ratio of RSPDB.Then the equivalent buckling coefficient and constraint coefficient of RSPDB with twoside restraint of are introduced.The result shows equivalent buckling coefficient reduces with the increase of spanlength ratio of RSPDB.The larger stiffness was obtained at the buckling modal convert point,which indicates better stiffening effect of RSPDB.For the span-length ratio of RSPDB within[0.5,1.0],1.23 is proposed as the constraint coefficient,and 1.0is proposed as the constraint coefficient for the span-length ratio of RSPDB within [1.0,2.0].These results provide a reference for future studies of SDBF structures.

关 键 词：两侧加劲 钢板深梁 等效屈曲系数 嵌固系数 

分 类 号：TU352.1[建筑科学—结构工程] TU375.4