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When constructing a precast concrete building, there are two main elements that come together to form the structural system. First the precast components, which can include precast footings, beams, columns, floor slabs, shear walls, etc., are provided primarily to transfer gravity loads. Second the joints and connections between the precast components allow the precast components to transfer lateral loads and uplift between components. The connections must transfer the loads between components, provide stability, and accommodate timely construction in the field. An area of interest in the field of structural engineering has been the seismic design and performance of precast concrete structures, and the performance of these structures relies heavily on the design and behavior of the connections between precast components. Details for the connections between precast components must be sufficiently ductile to dissipate seismic energy and prevent damage to the precast concrete components. They must also provide a generous construction tolerance; these joints have traditionally required provisions for shimming and grouting with modest amounts of reinforcement passing through the grouted joints. To improve installation precision and reduce construction time, a ductile yielding link between precast wall panels with cast-in steel frames has been proposed. This paper presents the development of an experimental program to test the ductile links to investigate their strength and ductility. A series of full-scale prototype connections were tested in a uniaxial test setup to determine the monotonic load–displacement response of different connection designs. The results of the experimental program were used to develop a numerical model of a precast concrete wall system for a 13-story building in North York, Toronto, Canada to simulate the design-level seismic performance of a structure built using these connections. Cyclic testing will be performed on the connections to provide material properties to the connections in the model. The results of the simulation will be analyzed to determine whether the connection strength and ductility are sufficient to provide acceptable life-safety performance during representative ground motions.

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Seismic Performance of Ductile Links for Wall-to-Wall Connections in Precast Concrete Structures

  • 会议论文

  • 发表日期：

    2025年

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  • Benson Doak,
  • Alan Lloyd,
  • Taylor Steele

摘要

When constructing a precast concrete building, there are two main elements that come together to form the structural system. First the precast components, which can include precast footings, beams, columns, floor slabs, shear walls, etc., are provided primarily to transfer gravity loads. Second the joints and connections between the precast components allow the precast components to transfer lateral loads and uplift between components. The connections must transfer the loads between components, provide stability, and accommodate timely construction in the field. An area of interest in the field of structural engineering has been the seismic design and performance of precast concrete structures, and the performance of these structures relies heavily on the design and behavior of the connections between precast components. Details for the connections between precast components must be sufficiently ductile to dissipate seismic energy and prevent damage to the precast concrete components. They must also provide a generous construction tolerance; these joints have traditionally required provisions for shimming and grouting with modest amounts of reinforcement passing through the grouted joints. To improve installation precision and reduce construction time, a ductile yielding link between precast wall panels with cast-in steel frames has been proposed. This paper presents the development of an experimental program to test the ductile links to investigate their strength and ductility. A series of full-scale prototype connections were tested in a uniaxial test setup to determine the monotonic load–displacement response of different connection designs. The results of the experimental program were used to develop a numerical model of a precast concrete wall system for a 13-story building in North York, Toronto, Canada to simulate the design-level seismic performance of a structure built using these connections. Cyclic testing will be performed on the connections to provide material properties to the connections in the model. The results of the simulation will be analyzed to determine whether the connection strength and ductility are sufficient to provide acceptable life-safety performance during representative ground motions.