# On Wind-Induced Fatigue of Curtain Wall Supporting Structure of a High-Rise Building
## 1 Introduction  
The curtain wall is a peripheral maintenance structure of buildings, which is composed of metal supporting structures (aluminum beam, column, steel structure, etc.) and plates (glass, aluminum plate, slate, ceramic plate, etc.). When panel material is made of glass, it is called a glass curtain wall, with functions of bearing and decoration. Compared with the main structure, maintenance structures such as curtain walls can be easily damaged in wind disasters. Because of improper design or installation of curtain wall connectors, the curtain wall will fall off a high-rise building when strong winds come, causing casualties. At home and abroad, there are limited studies on wind-induced fatigue of curtain wall supporting structures, so similar research can be consulted. [PERSON] et al., [1] studied the structural performance of millions through the full-scale wind simulation test of facade assembly. Under headwind, the tilting effect of male and female millions produces little influence, and million cannot be regarded as a valid interaction for hollow sections. [PERSON] et al., [2] proposed a bimodal probability distribution model for wind pressure acting on the windward side of a main building. It includes the Gaussian model and generalized extreme-value model, to reveal non-Gaussian characteristics of wind pressure on glass curtain walls. Moreover, [PERSON] et al., [3] tested the wind resistance performance of aluminum alloy columns with different structures in a unit glass curtain wall andanalyzed the numerical simulation. The results showed when there are proper numbers and positions of hooks, the beam-to-column constraint is very small whether the wind pressure is positive or negative. [PERSON] et al., [4] mainly investigated L-shaped cable-supported glass curtain walls, the wind-induced dynamic response in four directions is analyzed taking into account the fluid-structure interaction effects. The deflection of the glass surface is explained in view of displacement statistics, obtaining wind vibration coefficients suitable for engineering structure design, and the change in cable force is described, too. [PERSON] et al., [5] introduced a probabilistic performance-based wind engineering (PBWE) framework for estimating envelope damage, the envelope structures include the effects of demands originating from dynamic net pressure and structural responses for assessing the response of structural systems under material yielding/lag and large deformation settings. You [6] measured the cladding pressure by wind tunnel to estimate the stress in the connections, fatigue damages were evaluated for different city development stages using the direct wind time history method and Weibull wind distribution methods were adopted from the literature. With the aid of CFD (computational fluid dynamics) numerical simulation of large-scale building groups, [PERSON] [7] raises a method to analyze wind damage vulnerability of high-rise glass curtain walls. According to the research, the main failure mode of beams is caused by shear damage of bolts between beams and columns under the action of strong wind. At the same time, [PERSON] [8] studied structural theory and design specifications of glass curtain walls, explored wind resistance performance of glass curtain walls through a finite element simulation and actual measurement, then analyzed the safety performance of curtain walls according to interval numbers. [PERSON] et al., [9] researched wind-induced fatigue of a flexible support system of point-supported glass curtain wall and calculated its equivalent stress amplitude and cumulative damage, finding members at the truss nodes in support systems and weld position at support nodes are the weakest. The analysis of wind-induced fatigue of connectors can be referred to as connectors of other structures.