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A Study on the Unstable Behavior of H-Shaped Steel Beam-Columns Subjected to Multi-Dimensional Loads

多维荷载作用下H型钢梁柱失稳行为研究

基本信息

批准号：
16560507
负责人：
YAMAZAKI Shinji
金额：
$ 2.11万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560507/
关键词：
H-shaped steel beam-column loadig test biaxial bending monotonic loading cyclic loading lateral torsional buckling energy absorption capacity

项目摘要

Beam-columns of multi-story frames are subjected to biaxial bending moment due to horizontal forces acting on the columns in two directions during an earthquake. There are many unclear points on unstable behavior of H-shaped steel beam-columns subjected to biaxial bending moment. Members with a relatively small slenderness ratio can absorb plastic energy while gradually increasing lateral torsional deformation after yielding, but there have been few study experiments on such a case. This study aims at obtaining the basic data required to establish a method for quantitatively estimating the energy absorption ability through making clear the type of collapse for H-shaped steel beam-columns as well as basic parameters determining the energy absorption ability.In the experiments, the bending moment was loaded by acting a horizontal force in a direction with an angle from the principal axis of the section. The values for the angle were set as 0 (strong axis bending moment), 30, 60, 90 degre … More es (weak axis bending moment). The experiment variables were set as slenderness ratio, axial ratio, horizontal force loading direction (the angle) and loading method (nionotonic loading or cyclic loading).The results of this study can be summarized as follows :1) The results of analyses correspond well to the experiment results. The validity of the analytical method used in this study was confirmed.2) With regard to the member deformation condition at the ultimate stage, three patterns for the lateral deformation and torsional deformation were observed.3) All specimens subjected to an oblique load (the angle=30, 60 degrees) torsionally collapsed in such a state as the web axis approaches a direction at a right angle to the loading direction at the longitudinal center of the member.4) The skeleton curve on positive and negative sides obtained from the cyclic loading curve for the specimen (the angle=0 degrees) subjected to strong axial bending moment was lower than the monotonic loading curve. The skeleton curve for the other specimens (the angle=30, 60, 90 degrees) was almost equivalent to the monotonic loading curve.5) The relationship between the conditions for both the specimen and the loading and the amount of the energy absorption was obtained. Less

地震作用下，多层框架梁柱在双向水平力的作用下承受双向弯矩。双向弯矩作用下H形钢压弯构件的失稳性能目前还存在许多不清楚的地方。长细比较小的构件在屈服后可以吸收塑性能量，同时侧扭变形逐渐增大，但对这种情况的试验研究较少。为了明确H形钢压弯构件的破坏类型和吸能能力的基本参数，为建立吸能能力定量评估方法提供基础数据，试验中对H形钢压弯构件施加与截面主轴成一定角度的水平力。角度值设置为0（强轴弯矩）、30、60、90度 ...更多信息 es（弱轴弯矩）。试验变量为长细比、轴比、水平力加载方向（角度）和加载方式（非单调加载或循环加载），试验结果表明：1）分析结果与试验结果吻合较好。2）在极限状态下构件的变形条件方面，给出了构件的侧向变形和扭转变形的三种模式; 3）所有试件均受斜向荷载作用（角度=30，60度）在腹板轴线接近与构件纵向中心处的加载方向成直角的方向的状态下扭转塌陷。4）在强轴向弯矩作用下，由循环加载曲线（角度=0 °）得到的正、负侧骨架曲线均低于单调加载曲线。其余试件（角度=30、60、90 °）的骨架曲线与单调加载曲线基本相当。5）得到了试件和加载条件与能量吸收量的关系。少

项目成果

期刊论文数量（36）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Experimental Study on Inelastic Biaxial Bending of H-shaped Steel Beam-columns, Part 1: Monotonic Loading

H型钢梁柱非弹性双轴弯曲试验研究第1部分：单调荷载

DOI：
发表时间：
2006
期刊：
Proceeding of the 76th Architectural Research Meetings,2005,Kanto Chapter AIJ Vol.I
影响因子：
0
作者：
Ryota TAKAHAMA;Keisuke TOYAMA;Shinji YAMAZAKI;Susumu MINAMI
通讯作者：
Susumu MINAMI

H形断面鋼柱の塑性二軸曲げ実験(その1)単調戴荷

H形截面钢柱塑性双轴弯曲试验（第1部分）单调加载