|Table of Contents|

Experimental study on seismic performance of recycled brick aggregate geopolymer concrete beam-column joint assembly(PDF)

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

Issue:
2025年06期
Page:
12-21
Research Field:
建筑结构
Publishing date:

Info

Title:
Experimental study on seismic performance of recycled brick aggregate geopolymer concrete beam-column joint assembly
Author(s):
XU Li;  CHEN Jun;  YAN Guiyun;  ZHANG Pengqi;  LIU Ruyue
(School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, Fujian, China)
Keywords:
recycled brick aggregate;  geopolymer concrete;  frame joint;  seismic performance
PACS:
TU352.1
DOI:
10.19815/j.jace.2024.08101
Abstract:
In order to comprehensively utilize building waste clay bricks and industrial waste, a reinforced recycled brick aggregate geopolymer concrete(RRBGC)beam-reinforced recycled brick aggregate geopolymer concrete-filled steel tube(RBGCFT)column frame structure system was proposed. Using the replacement rate of recycled brick aggregate and axial compression ratio as research parameters, low cyclic loading tests were conducted on four RRBGC beam-RBGCFT column edge joint assemblies to analyze their seismic performance. The results show that the failure mode of the beam-column joint assembly is the beam hinge mechanism failure, and the plastic hinge at the beam end has good plastic deformation ability and can fully dissipate energy. The replacement rate r of brick aggregate has little effect on the bearing capacity and energy dissipation of beam-column joint assembly. When the replacement rate of brick aggregate increases from 0% to 50% and 100%, the peak load Mu decreases by 3.2% and 2.3% respectively, and the cumulative energy dissipation decreases by 6.4% and 16.3% respectively. Although recycled brick aggregates significantly reduce the elastic modulus of concrete, the stiffness of specimens with brick aggregate replacement rate of 50% and 100% during normal use is only 12% and 17% lower than specimens with replacement rate of 0%, respectively.

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Last Update: 2025-11-25