|Table of Contents|

Research on mechanical behavior of GRRP-reinforced sea sand concrete-filled steel reinforced polyethylene(SRPE)tubular columns under axial compression(PDF)

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

Issue:
2025年01期
Page:
14-25
Research Field:
建筑结构
Publishing date:

Info

Title:
Research on mechanical behavior of GRRP-reinforced sea sand concrete-filled steel reinforced polyethylene(SRPE)tubular columns under axial compression
Author(s):
HUO Jingsi1;  WANG Zhibin2;  LI Xinlei2;  WU Yanghang2;  GAO Jianping3
(1. Key Lab for Intelligent Infrastructure and Monitoring of Fujian Province, Huaqiao University, Xiamen 361021, Fujian, China; 2. College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China; 3. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, Jiangxi, China)
Keywords:
SRPE tube;  GFRP reinforcement;  sea sand concrete;  composite column;  axial loading capacity;  simplified calculation
PACS:
TU398.9
DOI:
10.19815/j.jace.2023.04008
Abstract:
The mechanical behavior and stress mechanism of glass fiber reinforced plastic(GFRP)-reinforced sea sand concrete-filled steel reinforced polyethylene(SRPE)tubular columns were studied by experiment and numerical simulation. Through 24 axial compression short column tests, the effects of SRPE pipe steel wire volume stirrup ratio, concrete strength and GFRP stirrup spacing on the mechanical behavior of the composite columns were studied. Based on the reasonable determination of the material constitutive model, ABAQUS finite element software was used for numerical simulation and parameter analysis. The results show that although the composite column fails in shear mode, it still has good ductility in the range of test parameters, which proves that the SRPE pipe and GFRP stirrup have a good confinement on the sea sand concrete. Finite element numerical parametric analysis shows that increasing the volume stirrup ratio of hoop steel wire can significantly improve the peak bearing capacity, residual bearing capacity and ductility. Increasing the strength of concrete can significantly improve the peak bearing capacity, residual bearing capacity and elastic stiffness, but the ductility is obviously reduced. The influence of other parameters on the mechanical behavior of composite columns is not significant. Based on the results of parameter analysis, the simplified calculation formulas of axial compression bearing capacity and ultimate strain of composite columns are proposed, which can provide reference for similar engineering practice.

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Last Update: 2025-01-20