原文传递
Critical Buckling Strains in Thick Cold-Formed Circular-Hollow Sections under Cyclic Loading
| 题名： | Critical Buckling Strains in Thick Cold-Formed Circular-Hollow Sections under Cyclic Loading |
| 正文语种： | 英文 |
| 作者： | Adam Jan Sadowski; Wei Jun Wong; Sai Chung Simon Li; Christian Malaga-Chuquitaype; Dimitris Pachakis |
| 作者单位： | Imperial College London;COWI UK Ltd., |
| 关键词： | section；loading；critic；dataset；strain；buck；rains；cold；cula；compact |
| 摘要： | Contrary to the large dataset of test results exploring the monotonic bending response of steel tubes, the corresponding dataset of cyclic bending tests remains very small. Seven compact and semicompact S355J2H cold-formed circular-hollow sections with diameter to thickness (D/t) ratios between 20 to 60, representative of piles used in piers and wharves, were brought to failure in three-point cyclic bending tests. Digital image correlation was employed to estimate average cross-sectional curvatures, and hence the critical bending strains, during local buckling at the midspan plastic hinges. These estimates were compared against those from two simplified localized hinge models and differed by up to a factor of two. A parametric study was performed with a validated finite-element model to ascertain the suitability of proposed design equations at predicting critical strains in piles with D/t from 20 to 60 under cyclic loading. Test and simulation data both show that critical buckling strains are lower under cyclic loading than under monotonic loading. This work can inform the future development of seismic design standards such as ASCE 61. |
| 出版日期： | 2020.09 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.09 |
| 页码： | 04020179 |
相关文献
- Stub Column Behavior of Cold-Formed High-Strength Steel Circular Hollow Sections under Compression
- Distortional Buckling of Cold-Formed Steel Flanges under Stress Gradient
- Consistent and Simplified Direct Strength Method for Design of Cold-Formed Steel Structural Members under Localized Loading
- Accuracy of Buckling Strength Curves Using Direct Strength Method in Estimating Axial Strengths of Cold-Formed Steel Members under Compression: Critical Review
- Tests of Cold-Formed Steel Semi-Oval Hollow Section Members under Eccentric Axial Load
- Design of Cold-Formed High-Strength Steel Tubular Stub Columns
检索历史
应用推荐
