International conference on construction engineering and project management (국제학술발표논문집)

  • 2024.07a
  • /
  • Pages.85-92
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  • 2024
  • /
  • 2508-9048(eISSN)
Korea Institute of Construction Engineering and Management (한국건설관리학회)
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A New Composite Wall Inner Tie System Applied in Reinforced Concrete Modular Integrated Construction

  • Xiaokang ZOU (Structures Research Hub, China Overseas Building Construction Limited) ;
  • Jiang HUANG (Structures Research Hub, China Overseas Building Construction Limited) ;
  • Wenjie LU (Structures Research Hub, China Overseas Building Construction Limited) ;
  • Jun SHI (Structures Research Hub, China Overseas Building Construction Limited) ;
  • Zhen ZHAO (Structures Research Hub, China Overseas Building Construction Limited) ;
  • Tian SHI (Structures Research Hub, China Overseas Building Construction Limited)
  • Published : 2024.07.29
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Abstract

Reinforced concrete modular integrated construction (MiC) has been widely used in Hong Kong nowadays, but the solutions for temporary tying of the side walls during the construction of the composite wall have still shortcomings. Based on a MiC project in Hong Kong, this paper proposes a new inner tie system for composite wall. The system components are installed on the side walls of precast modules without penetrating through the side walls. After the loop is rotated to contact the hook, the tying effect can be generated when the concrete is poured on site between the middle gap of two modules. This system replaces tie bolts penetrating through precast side walls, so that the modules' interior fitting-out can be fully completed in factory and the on-site construction has no adverse effects on the internal decoration. This paper mainly describes the mechanism of the system, FEA simulation and optimization of the member size, as well as tensile and punching shear tests to verify the reliability, safety and to get more information about failure mode of the system. The system will be further examined by assembling 1:1 mockup modules, and finally applied to a real MiC project soon. The system can also act as permanent tie bars for the composite wall to reduce the total wall thickness, save the structural cost and increase the usable area. Compared with other existing tying methods in the industry, the system is easy to install, reliable to take loads, adaptable to large construction errors, and has the potential to be widely used in future practical projects.

Keywords

Acknowledgement

The R&D funding support from China State Construction Engineering (Hong Kong) Limited is gratefully acknowledged.

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