原文传递
Robustness of Post-Tensioned Concrete Beam-Column Subassemblies under Various Column Removal Scenarios
| 题名： | Robustness of Post-Tensioned Concrete Beam-Column Subassemblies under Various Column Removal Scenarios |
| 正文语种： | eng |
| 作者： | Qian, Kai;Lan, Dong-Qiu;Zhang, Lu;Fu, Feng;Fang, Qin |
| 作者单位： | Guilin Univ Technol Guangxi Key Lab New Energy & Bldg Energy Saving Guilin 541004 Peoples R China;Guangxi Univ Coll Civil Engn & Architecture Nanning 530004 Peoples R China;Guilin Univ Technol Guangxi Key Lab New Energy & Bldg Energy Saving Guilin 541004 Peoples R China;Univ London Sch Math Comp Sci & Engn Struct Engn London EC1V0HB England;Army Engn Univ Dept Civil Engn Nanjing 210007 Peoples R China |
| 关键词： | Post-tensioned concrete (PC);Boundary condition;Strand profile;Disproportionate collapse |
| 摘要： | To fully recognize the load-resisting mechanisms of post-tensioned concrete (PC) structures with realistic boundary conditions against disproportionate collapse, four beam-column subassemblies were extracted from a prototype building and the side columns and joints were reproduced to reflect the actual boundary condition. The parametric analysis was conducted, including location of the removed column (middle or penultimate) and strand profile (straight or parabolic). In addition, two RC counterparts were tested as a control group. Test results indicate that the unbonded post-tensioning strand (UPS) was able to enhance the structural robustness by increasing compressive arch action capacity of RC beams and developing catenary action. Compared with RC specimens, both PC specimens achieved much higher load resistance; herein, the PC specimen with straight strand profile obtained the highest load resistance due to two strands used, while the PC specimen with parabolic profile had higher deformation capacity. However, the existence of UPS increased the tensile force demand to the side column, leading to the flexural tension failure of the side column when the loss of a penultimate column was considered. Finally, an analytical study was carried out to quantify the load resistance from each dominant load-resisting mechanism. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 5 |
| 页码： | 04022032.1-04022032.15 |
相关文献
- Experimental and Numerical Investigation on Progressive Collapse Resistance of Post-Tensioned Precast Concrete Beam-Column Subassemblages
- Rigid-Plastic Model for Progressive Collapse Assessment of Composite Beam-Column Connection Subassembly under Internal Column Removal
- Component-Based Modeling for Steel and Composite Beam-Column Joints Subjected to Quasi-Static and Impact Loads under Column Removal Scenarios
- Experimental and numerical study of a motion amplification mechanism to enhance the seismic dissipation capacity of precast, post-tensioned concrete rocking systems
- Progressive Collapse Resistance of Precast Concrete Frames with Discontinuous Reinforcement in the Joint
- Pres-Lam Buildings: State-of-the-Art
检索历史
应用推荐
