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High-Strength Rectangular CFT Members: Database, Modeling, and Design of Short Columns
| 题名： | High-Strength Rectangular CFT Members: Database, Modeling, and Design of Short Columns |
| 其他题名： | ACI(American Concrete Institute).(2014)."Building code requirements for structural concrete."ACI 318-14,Farmington Hills,MI. |
| 正文语种： | 英文 |
| 作者： | Zhichao Lai |
| 关键词： | relationship；angular；database；literature；three-dimensional；column；benchmarking；specification；design；reliability |
| 摘要： | AISC 360-16 (the current AISC Specification) does not endorse the use of high-strength materials (Fy ≥ 525 MPa and f0c≥ 70 MPa) for concrete-filled steel tube (CFT) columns because of a lack of adequate research and comprehensive design equations. This paper makes a contribution toward addressing this gap and proposes effective stress-strain relationships and design equations for highstrength rectangular CFT members using a three-step method. The first step consists of compiling the experimental database of high-strength rectangular CFT column tests in the literature and evaluating the possibility of extending the current AISC 360-16 design equations to highstrength rectangular CFT short columns. The second step consists of developing and benchmarking detailed three-dimensional (3D) nonlinear finite-element models for predicting the behavior of high-strength CFT columns from the database. The benchmarked models are then used to perform comprehensive parametric studies to (1) address gaps in the database and (2) develop effective stress-strain relationships for modeling the steel tube and concrete infill of high-strength rectangular CFT members, while indirectly accounting for the effects of confinement, yielding, and local buckling. The third step consists of using these effective stress-strain relationships and the enhanced database to propose a new design approach (including equations) for high-strength rectangular CFT short columns. Finally, a reliability analysis is performed to establish a resistance (strength reduction) factor (()) to be used with the proposed design equations. |
| 出版年： | 2018 |
| 论文唯一标识： | P-26Y2018V144N05014 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0002026 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 144 |
| 期： | 05 |
| 页码： | 154-171 |
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