原文传递
Composite Patch Configuration and Prestress Effect on SIFs for Inclined Cracks in Steel Plates
| 题名： | Composite Patch Configuration and Prestress Effect on SIFs for Inclined Cracks in Steel Plates |
| 正文语种： | 英文 |
| 作者： | Hesham M. El-Emam, S.M.ASCE; Hani A. Salim, M.ASCE;Hossam E. M. Sallam |
| 作者单位： | Univ, of Missouri;Jazan Univ |
| 关键词： | Composite patch; Prestress; Mixed mode I/II; Inclined edge crack; Stress intensity factor; Elastic-plastic finite element analysis; Metal and composite structures. |
| 摘要： | The fatigue life of steel bridges can be extended by externally bonding carbon fiber-reinforced polymer (CFRP) patches to the damaged elements to arrest the crack propagation. In this paper, the influence of the patch pretension level, stiffness, and fiber orientation on the stress intensity factor levels are investigated. A three-dimensional finite-element model of the double-sided CFRP patch-strengthened specimen is used to study the fracture behavior of an inclined edge crack under different combinations of loading Modes I and II. The introduction of a compressive stress by pretensioning of the CFRP patch prior to bonding produced a significant reduction of up to 70% in stress intensity factors (SIFs) for different crack lengths, which led to increasing the remaining fatigue life of the steel member. The increase in the CFRP patch-to-steel axial stiffness ratio reduced the SIFs by up to 30%. The optimum benefit of using the CFRP patch to reduce mode I SIF was accomplished when the patch axial stiffness was about 50% of or below the steel plate stiffness. Furthermore, orienting the fibers perpendicular to the crack direction is not necessarily the most effective in arresting the crack propagation. The effectiveness of the fiber orientation in the composite patch depends mainly on both the loading direction and the crack inclination angle. DOI: 10.106l/(ASCE)ST.1943-541X.0001727. © 2016 American Society of Civil Engineers. |
| 出版日期： | 2017.05 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.05 |
| 页码： | 04016229 |
相关文献
- Development and Performance of Innovative Steel Wedge Block–Crossed Inclined Stud–UHPC Connections for Composite Bridge
- Experimental Investigation on Punching Shear Mechanism of Concrete Interior Slab-Column Connections without Shear Reinforcement
- Cyclic Lateral Loading Behavior of Composite Plate Shear Walls/Concrete Filled
- Effect of deck cracking on prestress
- Eccentric-Axial-Load Test for Composite Columns Using Bolt-Connected Steel Angles
- Fatigue Tests on Fe-SMA Strengthened Steel Plates Considering Thermal Effects
检索历史
应用推荐
