原文传递
Postfire Strength of Channel-Type Shear Connectors
| 题名： | Postfire Strength of Channel-Type Shear Connectors |
| 正文语种： | eng |
| 作者： | Erfan Maliji;Hossein Yousefpour |
| 作者单位： | Babol Noshirvani Univ. of Technology;Babol Noshirvani Univ. of Technology |
| 关键词： | Composite;Shear connector;Postfire;Push-out;Elevated temperature |
| 摘要： | Abstract The combined action of steel and concrete in composite beams is accomplished via shear connectors that prevent slip between the two materials. In a fire event, the performance of these shear connectors may be impacted, hence affecting the strength of composite beams during and after a fire. This paper investigates the residual strength of channel-type shear connectors exposed to elevated temperatures. Twenty-two push-out specimens were fabricated with normal-weight and lightweight concrete and channel heights of 60, 80, and 100 mm. The specimens were tested without any heat exposure or after experiencing maximum temperatures of 400, 600, or 750°C. Results showed that temperatures up to 400°C did not cause a noticeable change in the residual strength of shear connectors, but on average, normal-weight concrete specimens exposed to 600°C and 750°C showed 17 and 31 percent decrease in their residual strength, respectively. Relatively similar strength reduction was observed in lightweight concrete specimens. Equations used in AISC 360-22 and CSA-S16-19 specifications provided reasonably accurate estimates of the capacity of unheated specimens but were excessively conservative for heat-exposed specimens. Finite-element models of the specimens were developed and validated based on the measured load-slip behavior of the specimens in preheating and postheating conditions. |
| 出版年： | 2023 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 149 |
| 期： | 10 |
| 页码： | 1.1-1.17 |
相关文献
- A new studded precast concrete sandwich wall with embedded glass-fiber-reinforced polymer channel sections: Part 1, experimental study
- Charaoterization of the shear behavior of Z-shaped steel plate conneotors used in insulated concrete panels
- Experimental Study on Impact Behavior of Stud Shear Connectors between Concrete Slab and Steel Beam
- Experimental Study and Theoretical Analysis of Resistance of Steel-Concrete-Steel Sandwich Beams
- Flexural behavior of precast concrete sandwich wall panels with basalt FRP and steel reinforcement
- Cyclic Behavior of Perfobond-Shear Connectors Subjected to Fully Reversed Cyclic Loading
检索历史
应用推荐
