Developing a PCM-enhanced mortar for thermally active precast walls

The design of connections is one of the most important considerations in the structural design of precast concrete structures. The purpose of the connection is to transfer loads, restrain movement and provide stability. Within one joint there may be several load transfers, each one must be designed for adequate strength and ductility and appropriately detailed. The proposed investigation aims to achieve efficient horizontal connections in precast walls with improved structural performance under various loads. HYSD reinforcement dowels are used as connectors. The arrangement of dowels is varied to achieve the efficient load transfer in the walls. The experimental investigation on three precast wall and one monolithic wall depicts that the precast wall exhibits high strength than the monolithic wall specimen and structural performance were found to be better than the monolithic wall specimen and also the efficient load transfer is achieved in the precast wall

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RESEARCH PROGRAMME ON SEISMIC PERFORMANCE OF REINFORCED CONCRETE WALLS: KEY RECOMMENDATIONS

Bulletin of the New Zealand Society for Earthquake Engineering ◽

10.5459/bnzsee.53.2.54-69 ◽

2020 ◽

Vol 53 (2) ◽

pp. 54-69

Author(s):

Alex Shegay ◽

Farhad Dashti ◽

Lucas Hogan ◽

Yiqiu Lu ◽

Arsalan Niroomandi ◽

...

Keyword(s):

Reinforced Concrete ◽

Experimental Studies ◽

Research Programme ◽

Concrete Walls ◽

Damage And Failure ◽

Reinforced Concrete Walls ◽

Wide Range ◽

Out Of Plane ◽

Assessment Guidelines ◽

Precast Walls

A wide range of reinforced concrete (RC) wall performance was observed following the 2010/2011 Canterbury earthquakes, with most walls performing as expected, but some exhibiting undesirable and unexpected damage and failure characteristics. A comprehensive research programme, funded by the Building Performance Branch of the New Zealand Ministry of Business, Innovation and Employment, and involving both numerical and experimental studies, was developed to investigate the unexpected damage observed in the earthquakes and provide recommendations for the design and assessment procedures for RC walls. In particular, the studies focused on the performance of lightly reinforced walls; precast walls and connections; ductile walls; walls subjected to bi-directional loading; and walls prone to out-of-plane instability. This paper summarises each research programme and provides practical recommendations for the design and assessment of RC walls based on key findings, including recommended changes to NZS 3101 and the NZ Seismic Assessment Guidelines.

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