Vulnerability Analysis Of Building Envelopes Under Wind Loading Considering The Interference Effects

Wind induced vulnerability is the cumulative probability of a structure exceeding a certain failure state under a given wind speed,which is an important means of typhoon disaster loss assessment as well as the core content of "engineering module" of typhoon catastrophe model.With the development of structural wind resistance research,wind-induced vulnerability research is more perfect,while the research objects are mostly single buildings,without considering the interference effect between building groups.Given the important influence of interference effect on the damage of building structure,it is necessary to study the wind-induced vulnerability of high-rise buildings and low rise buildings.Based on the above background and current situation,this paper adopts the reliability calculation method based on Monte Carlo sampling to calculate the wind-induced vulnerability of single high-rise building glass curtain wall and single low rise building doors and windows,considering the uncertainty of load and resistance.Then this paper calculates the wind-induced vulnerability of high-rise building glass curtain wall and low building doors and windows considering interference effect.And the interference factor is calculated to analyze the influence of interference effect on building wind-induced vulnerability.For high-rise buildings,this paper analyzes the influence of three factors on the surface wind pressure and interference effect of the target building,which are the location of disturbing building,wind direction angle and height ratio.It is found that the interference effect is the largest when the height ratio is 1.The analysis of the interference factor when the wind speed is 45 m/s show that the average loss rate of the glass curtain wall of the target building is 2.3 times of that of the single building under the most unfavorable conditions.For low rise buildings,this paper discusses the influence of building area density,distribution form and height ratio on the wind pressure and interference effect of the target building surface.It is found that the degree of interferenc e effect increases with the increase of building area density.The influence of the distribution of the interference factor on the interference effect is analyzed whe n the wind speed is 45 m/s.The results show that when the building area density is 0.1,the loss of the uniform distribution is lower than that of the staggered distribution which is lower than that of the random distribution.This paper analyzes the wind-induced vulnerability of low rise building wall along the crack as well as along the tooth crack.It is found that the mortar strength grade is the main factor affecting the wind-induced vulnerability of the wall using the control variable method.