| Under strong winds,local damage is liable to be caused in the curtain wall structure of high-rise buildings.At this time,the remaining curtain wall structures will be in a high-risk state under the combined effect of internal and external pressure.Meanwhile,people’s understanding of wind-induced internal pressure is not enough.In China’s current"Load code for the design of building structures"(GB50009-2012),the internal pressure coefficients are given in terms of building structures with single-sided main openings and closed structures.In the case of buildings with multifaceted openings,the coefficients are not mentioned for the internal pressure.Obviously,it is no longer sufficient for practical engineering applications.Therefore,it is necessary to carry out in-depth research on the wind-induced internal pressure of high-rise buildings.In this paper,CFD software Fluent 16.0 is used to analyze the influence of different opening numbers,opening positions,opening areas,and wind direction angle on the wind-induced average internal pressure of a single open-rise high-rise building,which means a more systematic study is conducted.The main research contents and conclusions are as follows:(1)Based on the flow characteristics of this paper maintain a high level of uniformity in numerical simulation,a numerical analysis method designed for opening high-rise buildings is established.(2)The average internal pressure of the high-rise building structure with an opening can be described by a unified value at any wind direction angle.The average internal pressure coefficient of high-rise buildings with open tunnels varies drastically under the different wind direction angles.As for single-sided high-rise buildings,the number of openings and the area of the openings have almost no effect on the average internal pressure coefficient,but the location of the opening has a greater impact.For multi-faceted high-rise buildings,the average internal pressure coefficient depends on the relative size of the opening area on each side.The theoretical estimation formula of wind-induced average internal pressure has high accuracy.(3)When the two buildings are arranged in tandem,the interference effect on the average internal pressure coefficient caused by the upstream interfering building on the disturbed building with a hole on the windward side is the shielding effect.When the two buildings are arranged side by side,the interference effect on the average internal pressure coefficient caused by the disturbing building on the side-opened disturbed building is the canyon effect.When the two buildings are arranged in staggered rows,the average internal pressure coefficient of the disturbed building on the windward side of the disturbed building is the shielding effect under the wind direction angles of 0°,30°,and 45°.(4)The average static wind pressure coefficient of high-rise buildings with a single open tunnel is generally large,which is not good for the curtain wall structure.Relatively speaking,the shielding effect produced by the tandem or staggered arrangement can effectively reduce the average static wind pressure coefficient of the disturbed buildings with openings,while the canyon effect produced by the side-by-side arrangement will increase the average static wind pressure coefficient of the disturbed buildings with side openings. |
