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Metal connectors are important load-bearing components in precast concrete insulated sandwich wall panels, and their tensile capacity need to be determined through testing. Due to the variety of connector styles and different anchoring structures, this article focuses on the commonly used single-pull and double-pull test methods, using typical specifications of pin connectors and flat connectors for tensile testing, and considering the influence of different constraints on the single-pull test method. By comparing the failure modes, tensile strains and tensile capacity of the connectors, the study shows that using the double-pull test method to test metal connectors results in more stable and safer test results, and it is recommended to prioritize this method.

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Comparative Study of Tensile Capacity Testing Methods for Metal Connectors Used in Precast Concrete Insulated Sandwich Wall Panels

  • 章节

  • 出版模式：

    开放获取

  • 发表日期：

    2025年

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  • Puyan Wang,
  • Feng Tu,
  • Kai Shu,
  • Yi Zhao,
  • Weijun Zhong,
  • Jian Zhou

摘要

Metal connectors are important load-bearing components in precast concrete insulated sandwich wall panels, and their tensile capacity need to be determined through testing. Due to the variety of connector styles and different anchoring structures, this article focuses on the commonly used single-pull and double-pull test methods, using typical specifications of pin connectors and flat connectors for tensile testing, and considering the influence of different constraints on the single-pull test method. By comparing the failure modes, tensile strains and tensile capacity of the connectors, the study shows that using the double-pull test method to test metal connectors results in more stable and safer test results, and it is recommended to prioritize this method.