GFRP圆管脚手架节点承载能力试验与有限元研究

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (6): 37-42.

GFRP圆管脚手架节点承载能力试验与有限元研究

武炜凯¹, 李飞^2*, 陈辉国¹, 邓安仲³

1.陆军勤务学院军事设施系,重庆401331;
2.重庆交通大学土木工程学院,重庆400074;
3.陆军勤务学院国家救灾应急装备工程技术研究中心,重庆401331

收稿日期:2019-03-20 出版日期:2019-06-25 发布日期:2019-06-28
通讯作者: 李飞(1983-),男,博士,讲师,主要从事复合材料连接技术方面的研究,lifei609@163.com。
作者简介:武炜凯(1995-),男,硕士研究生,主要从事复合材料结构方面的研究。
基金资助:
国家自然科学基金(11702324)

EXPERIMENTAL STUDY AND FINITE ELEMENT ANALYSIS ON BEARING CAPACITY OF JOINT OF GFRP TUBES SCAFFOLDS

WU Wei-kai¹, LI Fei^2*, CHEN Hui-guo¹, DENG An-zhong³

1.Dept. of Military Installations, Army Logistics University of PLA, Chongqing 401331, China;
2.School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
3.National Disaster Emergency Equipment Engineering Technology Research Center,Army Logistics University of PLA, Chongqing 401331, China

Received:2019-03-20 Online:2019-06-25 Published:2019-06-28

摘要/Abstract

摘要： 要将复合材料圆管用于脚手架结构必须解决杆件与杆件之间的连接问题,由于GFRP圆管横向强度低,因此需要研究将传统钢扣件应用于GFRP圆管连接时杆件节点的力学性能。本文首先通过不加垫层扣件和加垫层扣件对GFRP圆管施加预紧扭矩,得出GFRP圆管在两种不同扣件下的承载规律;其次在预紧力试验基础上进行抗滑移试验,研究了垫层对节点抗滑承载能力的影响;最后建立了节点有限元模型,通过建立的有限元模型对中间垫层的厚度进行优化。研究表明:增加半圆形钢垫层可以大幅度提高GFRP圆管可承受的预紧扭矩,并改善GFRP圆管的受力分布,并且抗滑移承载力提高约26.3%。同时通过有限元可得垫层厚度取3.5 mm较为适宜。

关键词: GFRP圆管, 扣件, 预紧力, 抗滑性能, 试验研究, 有限元分析

Abstract: To apply composite tubes to the scaffolding structure, the problem of connection between members should be settled. Seeing the low transverse strength of GFRP tubes, we need to study the mechanical properties of member nodes when applying traditional steel fasteners to GFRP tube connection. In this paper, the author first imposed preload torque on GFRP tubes with cushion-free fasteners and cushioned fasteners and obtained therefrom the rules of bearing of GFRP tubes with two different fasteners. After that, based on the pretension test, the author performed the anti-slide test and studied the influence of cushions on the anti-slide bearing capacity of the nodes. In the end, the author established a finite element model of the nodes and optimized the thickness of the middle-layer cushions with the model built. The research demonstrated that: the increase in semicircular steel cushions could noticeably enhance the preload torque bearable for GFRP tubes, improve the distribution of force in GFRP tubes and better the anti-slide bearing capacity by about 26.3%. In the meantime, the finite element model indicated the appropriate cushion thickness to be 3.5 mm.

Key words: GFRP tubes, couplers, tightening torque, anti-slipping performance, experimental study, finite element analysis

中图分类号:

TB332

武炜凯, 李飞, 陈辉国, 邓安仲. GFRP圆管脚手架节点承载能力试验与有限元研究[J]. 玻璃钢/复合材料, 2019, 0(6): 37-42.

WU Wei-kai, LI Fei, CHEN Hui-guo, DENG An-zhong. EXPERIMENTAL STUDY AND FINITE ELEMENT ANALYSIS ON BEARING CAPACITY OF JOINT OF GFRP TUBES SCAFFOLDS[J]. Fiber Reinforced Plastics/Composites, 2019, 0(6): 37-42.

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