Experimental Study on Bearing Behavior and Debonding Damage of Hidden Frame Glass Curtain Walls Under Negative Wind Pressure

doi:10.16183/j.cnki.jsjtu.2022.466

Abstract

Abstract:

It is a common problem that the glass panel falls due to the damage of silicone structural sealant used for the connection of the hidden frame glass curtain walls in the service life of the curtain walls. Most of the existing studies used dynamics methods to detect the debonding damage of curtain walls. However, these methods usually require additional load excitation, and the measured dynamic response data are susceptible to environmental noise, which makes it difficult to achieve reliable assessment of the safety condition of curtain walls. In order to solve the above problems, this paper proposes a method to detect the debonding damage of curtain wall units by using the deflection and rotation angles of the glass panel under the action of negative wind pressure. First, a series of debonding damage experiments of hidden frame glass curtain wall are designed to verify the feasibility of using deflection and rotation angle to detect the safety state of the curtain wall under wind load. Then, based on the experimental results, a safety risk monitoring system for hidden frame glass curtain walls is proposed, which can realize the real-time monitoring of curtain wall units and conduct rapid ide.pngication of debonding damage.

Key words: hidden frame glass curtain walls, negative wind pressure, deflection, rotation angles, damage monitoring

CLC Number:

TU317

ZHOU Lian, ZHANG Kai, XU Han, WANG Feiliang, ZHANG Yiping, TANG Lina, YANG Jian. Experimental Study on Bearing Behavior and Debonding Damage of Hidden Frame Glass Curtain Walls Under Negative Wind Pressure[J]. Journal of Shanghai Jiao Tong University, 2024, 58(7): 1130-1138.

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构件	截面类型	截面尺寸	长度/ mm	数量
方形框架	热轧H型钢	100 mm×100 mm× 6 mm×8 mm	1 076	4
支撑腿	等边角钢	100 mm×100 mm×16 mm	1 000	4

组分	密度/ (g·cm^-3)	黏度/ (mPa·s)	适用期/ min	表干时间/ min
基胶(A组分)	1.41	170 000	—	—
固化剂(B组分)	1.03	80 000	—	—
混合物(A和 B质量比12∶1)	1.40	-	30~50	0.5~1.0

性能参数	环境条件	取值
邵氏硬度/Shore A	养护24 h	38
邵氏硬度/Shore A	养护14 d	44
拉伸黏结性/MPa	23 ℃	0.97
拉伸黏结性/MPa	90 ℃	0.85
拉伸黏结性/MPa	-30 ℃	1.84
拉伸黏结性/MPa	浸水后	1.01
拉伸黏结性/MPa	浸水+紫外线照射300 h	0.97
黏结破坏面积/%	-	0
最大拉伸时伸长率/%	23 ℃	140

转角方向	数据符号	脱胶位置
x	+	底边
	-	顶边
y	+	左边
	-	右边