Articles

Experimental Study on Bending Behavior of CLT-UHPFRC Composite Beam

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Abstract

Cross-laminated timber (CLT) and UHPFRC are both novel building materials. CLT panels are gaining popularity in the construction of floors, roofs, walls, and bridge decks due to their superior dimensional stability and load bearing capacity when compared to conventional wood. Despite these advantages, designers are concerned about the low bending resistance and susceptibility to environmental effects of CLT. To eliminate these concerns, it is proposed that the CLT core be encased in a thin layer of UHPFRC as the envelope material. Two eight-foot-long CLT-UHPC composite beams were cast using three- and five-layer CLT and subjected to a three-point bending test until failure. The UHPFRC layer for both beams measured 1.50" at the bottom and 1.25" on the remaining three sides. In order to prevent moisture transfer in CLT, a water proofing test was performed, and the best water proofing membrane was used as an interlayer between CLT and UHPFRC in composite beam. The relationship between moment and curvature was analyzed numerically. The results of the experimental tests and numerical analysis demonstrate the composite beam's enhanced structural performance and identify it as a viable alternative for modern building and bridge construction.

Keywords: wood-UHPC composite, structural testing

How to Cite:

Poudel, B., Aaleti, S. & Bhardwaj, S., (2023) “Experimental Study on Bending Behavior of CLT-UHPFRC Composite Beam”, International Interactive Symposium on Ultra-High Performance Concrete 3(1): 105. doi: https://doi.org/10.21838/uhpc.16711

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