Numerical Investigation on the Seismic Behavior of Novel Precast Beam–Column Joints with Mechanical Connections

Author:

Zhuang Mei-Ling123,Sun Chuanzhi4,Yang Zhen2,An Ran3,Bai Liutao5,Han Yixiang1,Bao Guangdong1

Affiliation:

1. School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China

2. Water Resources Research Institute of Shandong Province, Jinan 250013, China

3. School of Civil Engineering, Shandong University, Jinan 250061, China

4. School of Civil Engineering and Architecture, Suqian College, Suqian 223800, China

5. School of Civil Engineering, Southeast University, Nanjing 211189, China

Abstract

Traditional cast-in-place beam–column joints have the defects of high complexity and high construction difficulty, which seriously affect the efficiency and safety of the building construction line, and precast beam–column joints (PBCJs) can greatly improve the construction efficiency and quality. At present, the investigations on the seismic behavior of precast reinforced concrete structures are still mainly focused on experiments, while the numerical simulations for their own characteristics are still relatively lacking. In the present study, the seismic behavior of novel precast beam–column joints with mechanical connections (PBCJs-MCs) is investigated numerically. Based on the available experimental data, fiber models for four PBCJs-MCs are developed. Then, the simulated and experimental seismic behaviors of the prefabricated BCJs are compared and discussed. Finally, the factors influencing the seismic behavior of the PBCJs-MCs are further investigated numerically. The numerical results indicate that the fiber models can consider the effect of the bond–slip relationship of concrete and reinforcement under reciprocating loads. The relative errors of the simulated seismic behavior indexes are about 15%. The bearing capacity and displacement ductility coefficients of the PBCJs-MCs decrease rapidly as the shear-to-span ratio (λ) increases. It is recommended that the optimum λ for PBCJs-MCs is 2.0–2.5. The effect of the axial load ratio on the seismic behavior of PBCJs-MCs can be negligible in the case of the PBCJs-MCs with a moderate value of λ.

Publisher

MDPI AG

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