Sustainable Seismic Solutions: RC Frames Reinforced Using CLT Shear Walls  

When – Wednesday 27th August 2025

Where – UoA Building 260-055, 12 Grafton Road - Case Room 3 (69)

Agenda –
17:30 pre-presentation refreshments
18:00 presentation

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Abstract

Japan and New Zealand share similar seismic risks and an urgent need for sustainable construction solutions. This talk presents a study on hybrid structural systems that combine reinforced concrete (RC) frames with cross-laminated timber (CLT) shear walls to enhance seismic resilience while reducing carbon emissions. Two scaled specimens with different connection details were tested under pseudostatic cyclic loading to evaluate their seismic performance. The results showed that CLT infill walls significantly improve lateral strength and help control structural damage. To support practical implementation, a simplified analytical model was also developed. The findings highlight the potential of RC–CLT hybrid systems as an effective, low-carbon retrofit solution for earthquake-prone regions.  

Biography

Dr. Hamood Alwashali is an Associate Professor at Okayama University, Japan, specializing in structural and seismic design. His research focuses on sustainable and resilient building systems, particularly hybrid structures combining reinforced concrete (RC) and timber. He has authored over 30 peer-reviewed publications and, with his group, produced more than 100 academic outputs, including JICA-supported seismic evaluation guidelines. Dr. Alwashali is a member of the Architectural Institute of Japan and the Japan Association for Earthquake Engineering. At the Green Innovation Center at Okayama University, he leads international collaborations and organizes workshops on sustainable construction. His current work explores simple and effective seismic retrofit strategies using cross-laminated timber (CLT) walls within RC frames.  

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Sustainable Seismic Solutions: RC Frames Reinforced Using CLT Shear Walls