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Experiment and Numerical Simulation on Seismic Performance of New Type of Prefabricated Concrete Beam-column Joint(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年04期
Page:
24-32
Research Field:
Publishing date:

Info

Title:
Experiment and Numerical Simulation on Seismic Performance of New Type of Prefabricated Concrete Beam-column Joint
Author(s):
DING Ke-wei1; 2;  YE Yu1; 2
(1. Anhui Provincial Key Laboratory of Building Structure and Underground Engineering, Anhui Jianzhu University, Hefei 230601, Anhui, China; 2. College of Civil Engineering, Anhui Jianzhu University, Hefei 230601, Anhui, China)
Keywords:
prefabricated concrete beam-column joint;  finite element analysis;  bolt connection;  seismic behavior
PACS:
TU375.4
DOI:
10.19815/j.jace.2020.10073
Abstract:
In order to study the impact of different bolt strength grades on the seismic performance of the new type of prefabricated concrete beam-column joint, full-scale tests were carried out on the beam-column joints with 5.6 and 8.8 grade bolts, respectively. The seismic performance indicators such as the hysteretic curve, skeleton curve, secant stiffness, and equivalent viscous damping coefficient of the node were discussed. Moreover, based on ABAQUS finite element software, the cast-in-place joint and the test joint with 5.6 grade bolt connection were numerically simulated. The results show that the semi-rigid beam-column joints based on 5.6 and 8.8 grade bolt connections have good seismic performance and energy dissipation capacity. The stiffness of the two groups of beam-column joint members gradually decreases with the increase of the displacement level. Compared with the joint connected by 5.6 grade bolts, the stiffness of the joint connected by 8.8 grade bolts degrades faster, and under the positive load, the ultimate bearing capacity of the joint connected by 5.6 grade bolts is 85.42% of that of the joint connected by 8.8 grade bolts. Under negative loading, the ultimate bearing capacity of the joint connected by 5.6 grade bolts is 83.68% of that of the joint connected by 8.8 grade bolts. The finite element simulation results have high accuracy and can well reflect the seismic performance of joint members. The cast-in-situ joints are better than the experimental joints in terms of energy consumption, but the ultimate bearing capacity of the experimental joints is better than that of the cast-in-place node. The research results can provide a basis for the seismic design of prefabricated semi-rigid beam-column structures and provide a reference for the development and application of new prefabricated beam-column joint members.

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Last Update: 2021-07-10