Shear strength of RC beams subjected to cyclic thermal loading |
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| Affiliation: | 1. Department of Civil Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia;2. Department of Civil Engineering, Indian Institute of Technology Roorkee, India;1. Department of Civil Engineering, Ryerson University, Toronto, ON, Canada;2. Department of Civil Engineering, Gazi University, Ankara, Turkey;1. Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China;2. Shanghai Key Laboratory of Engineering Structure Safety, Shanghai, 200032, China;1. Dokuz Eylul University, Department of Civil Engineering, Buca, Izmir 35160, Turkey;2. American University of Sharjah, Department of Civil Engineering, P.O. Box 26666, Sharjah, United Arab Emirates |
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| Abstract: | The experiments were performed for assessing the influence of cyclic thermal loading on the shear strength of reinforced concrete (RC) beam specimens. One hundred eleven RC beams of 100 × 150 × 1200 mm size reinforced in tension zone with two bars of 8, 10 and 12 mm diameters were tested under four point loading. The beams were subjected to a number of thermal cycles varying from 7 to 28 cycles with peak temperature taken as 100, 200 and 300 °C. The effects of thermal cycles on the crack pattern, failure mechanism, first crack load and the shear strength of beams have been discussed. The shear strength of the beams has been found to increase by up to 10% at lower temperature cycles of 100 and 200 °C but reduces by up to 14% at higher temperature (300 °C) depending on the severity of thermal loading. The results of study emphasize the need for developing appropriate guidelines for the design of RC structural elements used in comparatively high temperature environment with cyclic thermal loading conditions. |
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