GFRP加固背栓式石材幕墙面板的抗弯性能

王作虎; 姚渊; 高占广; 李罗伟

doi:10.3969/j.issn.0258-2724.20200420

GFRP加固背栓式石材幕墙面板的抗弯性能

doi: 10.3969/j.issn.0258-2724.20200420

1.
北京建筑大学土木与交通工程学院, 北京 100044
2.
中国建筑技术集团有限公司, 北京100013

基金项目: 国家重点研发计划(2017YFC0806100)

详细信息

作者简介:
王作虎(1979—)，男，副教授，博士，研究方向为建筑结构加固，E-mail：wangzuohu@bucea.edu.cn

中图分类号: TU375
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- 文章访问数: 332
- HTML全文浏览量: 200
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- 被引次数: 14
出版历程
- 收稿日期: 2020-07-02
- 录用日期: 2020-12-09
- 修回日期: 2020-10-22
- 网络出版日期: 2020-12-09
- 刊出日期: 2020-12-09

Flexural Behavior of GFRP Reinforced Granite Cladding Panels with Undercut Bolt Anchorage

1.
School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
2.
China Building Technique Group Co. Ltd, Beijing 100013, China

摘要

摘要:
为研究石材面板在不同加固形式下的破坏形态和抗弯承载力，对33块背栓式花岗岩石材面板进行了迎风面和背风面的抗弯试验. 石材幕墙面板的连接节点用金属圆环加固，面板背面用GFRP （glass fiber reinforced plastics）进行十字、对角、横向全贴和纵向全贴的粘贴方式加固，并对其承载力进行了分析. 结果表明：石材幕墙面板采用节点加固后在背风面加载方向的破坏形态有所改善，承载力相对于未进行节点加固石材面板提高了0.50倍；石材面板背面粘贴GFRP的4种加固方式，都能较好地保证石材面板破坏后的整体性，并能提高石材面板迎风面加载方向的抗弯承载力，最大提高2.30倍. 研究验证了背栓式石材幕墙节点加固在工程应用中的可行性.
- 石材幕墙 /
- 背栓式 /
- 节点加固 /
- 面板加固 /
- GFRP
Abstract:
To explore the failure mode and bearing capacity of the granite cladding panel under different reinforcements, flexural tests were conducted on the windward and leeward sides of 33 granite cladding panels with undercut bolt anchorage. The joints of the granite cladding panels were reinforced with metal ring, and the panel back was reinforced with glass fiber reinforced plastics (GFRP) in cross, diagonal, horizontal, and vertical paste; then the bearing capacity of the panels was analyzed.The results show that after the panel is reinforced at the joints, the failure mode of the leeward side is improved in the loading direction. Compared with the panel without joint reinforcement, its bearing capacity is increased by 0.50 times. The four GFRP reinforcement modes at the back of the panel can keep its integrity after failure emerges and also improve the bending capacity of the panel windward side in the loading direction by 2.30 times at most, verifying the feasibility of the reinforcement measure of granite cladding panels with undercut bolt anchorage for engineering applications.
- granite cladding /
- undercut bolt anchorage /
- joint reinforcement /
- panel reinforcement /
- glass fiber reinforced plastics

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图 1 石材面板尺寸及加固图

Figure 1. Granite cladding panel size and reinforcement layout

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图 2 加载装置及测量方案

Figure 2. Loading device and measurement scheme

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图 3 试件破坏形态

Figure 3. Failure mode of specimens

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图 4 极限荷载的对比

Figure 4. Comparison of ultimate load

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图 5 材料本构关系

Figure 5. Constitutive relationship of materials

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图 6 面板有限元模型

Figure 6. Finite element model of panel

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表 1 试件设计参数

Table 1. Details of specimens

试件编号	数量/个	厚度/mm	连接节点	GFRP 粘贴方式	试件编号	数量/个	厚度/mm	连接节点	GFRP 粘贴方式
BS-F	3	30			BS-B	3	30
BS-J-F	3	30	加固		BS-J-B	3	30	加固
BS-J-F-1	3	30	加固	十字	BS-J-B-1	3	30	加固	十字
BS-J-F-2	3	30	加固	对角	BS-J-B-2	3	30	加固	对角
BS-J-F-3	3	30	加固	纵向全贴	BS-J-B-3	3	30	加固	纵向全贴
BS-J-F-4	3	30	加固	横向全贴

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表 2 GFRP实测性能

Table 2. Measured performance of GFRP

试样	抗拉强度/MPa	厚度/mm	弹性模量/MPa
GFRP	1 444.4	0.167	1.33 × 10⁵

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表 3 不同荷载下试验结果

Table 3. Test results under different loadings

试件编号	试验	极限荷载/N	极限位移/mm	破坏形态	试件编号	试验	极限荷载/N	极限位移/mm	破坏形态
BS-F	(1)	20.530	1.12	节点破坏	BS-B	(1)	9.423	1.29	节点破坏
	(2)	21.873	0.91			(2)	9.603	1.22
	(3)	20.794	1.05			(3)	9.279	1.19
	平均荷载	21.065	1.03			平均荷载	9.435	1.23
BS-J-F	(1)	23.676	1.18	板断裂	BS-J-B	(1)	14.051	1.91	板断裂
	(2)	23.245	1.26			(2)	13.946	1.94
	(3)	24.152	1.22			(3)	14.513	2.08
	平均荷载	23.691	1.22			平均荷载	14.170	1.98
BS-J-F-1	(1)	69.533	5.03	板断裂	BS-J-B-1	(1)	14.867	1.63	板断裂
	(2)	70.463	4.97			(2)	14.513	1.45
	(3)	68.987	4.85			(3)	14.725	1.53
	平均荷载	69.661	4.95			平均荷载	14.702	1.54
BS-J-F-2	(1)	58.765	4.22	板断裂	BS-J-B-2	(1)	16.478	1.32	板断裂
	(2)	57.360	4.13			(2)	16.344	1.51
	(3)	57.553	4.24			(3)	15.681	1.45
	平均荷载	57.893	4.20			平均荷载	16.168	1.43
BS-J-F-3	(1)	31.113	1.43	板断裂	BS-J-B-3	(1)	14.862	1.29	板断裂
	(2)	38.031	1.52			(2)	15.577	1.36
	(3)	36.145	1.48			(3)	15.245	1.45
	平均荷载	35.096	1.48			平均荷载	15.227	1.37
BS-J-F-4	(1)	56.975	2.71	板断裂
	(2)	60.895	2.77	板断裂
	平均荷载	58.935	2.74

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表 4 荷载模拟值与试验值对比

Table 4. Comparison of simulated and experimental values

试件编号	试验值/N	模拟值/N	误差/%
BS-B	9 435.45	9 965.11	5.61
BS-J-B	14 170.55	15 383.55	8.56
BS-J-B-1	14 702.06	15 957.79	8.54
BS-J-B-2	16 168.12	17 680.88	9.36
BS-J-B-3	15 227.31	13 246.92	13.01
BS-F	21 065.81	23 706.66	12.54
BS-J-F-1	69 661.34	78 417.77	12.57
BS-J-F-2	57 893.21	64 527.76	11.46
BS-J-F-3	35 096.88	38 880.32	10.78

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表 5 初始安装缺陷分析

Table 5. Initial installation defect analysis

石材编号	缺陷数/个	极限荷载/N	试验荷载/N	降低率/%
BS-B	1	6 382.3	9 435.0	32.36
BS-B	2 （对角）	4 229.7	9 435.0	55.17

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参考文献(12)

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