Numerical analysis of inclined demountable precast concrete walls with rocking-based composite columns for seismic protection of building structures

Naserpour, Afshin; Fathi, Mojtaba; Dhakal, Rajesh

doi:10.1016/j.jobe.2023.107009

Cited by 3 publications

(1 citation statement)

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“…Iqbal proposed a prestressed multi-layer timber structure frame, and based on the seismic performance test of the joint, it was shown that prestressed connections have good recovery ability, but the energy dissipation capacity requires additional energy dissipation devices [25]. Naserpour proposed a prefabricated shear wall structure with additional rocking columns, and the results indicated that the additional rocking column system can effectively reduce the residual deformation [26]. Guo proposed a PPEFF system based on prestressed connection technology and studied the seismic performance of the joint through experiments and numerical analysis.…”

Section: Introductionmentioning

confidence: 99%

The Cyclic Performance and Macro-Simplified Analytical Model of Internal Joints in RC-Assembled Frame Structures Connected by Unbonded Prestressed Strands and Mortise-Tenon Based on Numerical Studies

Wang,

Zhang,

Zhang

2024

Buildings

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This paper introduces a novel type of connection that integrates unbonded prestressed strands (UPS) and mortise-tenon in an assembly frame structure (UPS-MTF). First, the damage process and failure modes of the joints under reciprocating horizontal loads were systematically analyzed using refined numerical models. The recommended values of the design parameters of the joints were derived from the parametric analysis results. Refined numerical modeling results reveal the diagonal compression strut mechanism within the core region of the joint. The diagonal compression struts model assists in establishing the theoretical calculation formula for the skeleton curve of shear stress–strain in the core region. Second, a genetic algorithm (GA) parameter was identified for the restoring force model of the core region to determine the parameters of the hysteresis rules. Finally, a macro-simplified analytical model of the joint was created based on the restoring force model of the core region, and parameter analysis was conducted to verify the applicability of this macro-simplified analytical model. The research results prove that the damaged form of the joint proposed in this paper originates from the shear and relative slip damage between the components in the core region. The axial compression ratio significantly affects the hysteretic performance of the joints, and the upper and lower limit values were identified for the axial compression ratio of the joints. The area and initial effective stress of the UPS exert a minimal effect on the hysteretic performance of the joint. Based on the method proposed in this paper for determining the restoring force model in the core region of the joints, the hysteresis curves obtained from the macro-simplified analytical model closely match the refined numerical analysis model results. This correspondence verifies the applicability of the macro-simplified analytical model.

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Section: Introductionmentioning

confidence: 99%