Wind Load Characteristics And Interference Effect Of Wind-induced Vibration Response Of Three Tower Connected Super High-rise Buildings Arranged In Parallel

With the rapid development of the city and the reduction of land resources,high-rise buildings have become the main direction of future development.It is more and more common to have several high-rise buildings at the same time in a certain area of the city,resulting in more and more serious wind load interference effect between high-rise buildings.The forms of high-rise buildings are becoming more and more diverse.They are not limited to single buildings and two tower connected buildings.Now there are many three tower connected buildings.The interference effect of three tower connected building is quite different from that of single building and two tower connected building,and there is basically no research related to the architectural style.It is necessary to further study the wind-induced interference effect of three tower connected building.This paper takes a three tower connected building project as the background.In order to study the interference effect of the three tower connected building,four comparison conditions are added on the basis of the project.The five conditions are whether the three tower connected building has surrounding buildings and three single buildings.In this paper,the wind tunnel test is carried out for these five working conditions,and the numerical simulation is carried out on the basis of the test.The specific work and main conclusions are as follows:(1)The wind load characteristics of single buildings are studied,and the influence of concave surface cross-section on wind load is analyzed.On the surface of the study results,at the 0° wind direction angle,the concave relative to the square section has basically no effect on the overall average wind pressure coefficient facing the windward,but it will increase the maximum value of the average wind pressure coefficient,and the negative pressure value on both sides is larger than the square section,and the negative pressure value of the leeward side is smaller than the square section.(2)The wind load characteristics and interference effect of three tower connected building are analyzed.When the three towers are arranged in parallel,the slit effect causes the negative pressure on both sides of the adjacent surface of the building to increase significantly and decrease in the middle;When the three towers are arranged in series,the interference of the downstream building on the windward side and two sides of the upstream building can be basically ignored,but the negative wind pressure on the leeward side of the upstream building will be significantly reduced;Affected by the upstream and downstream buildings,the wind pressure in the middle of the three towers decreases significantly,especially on the windward and leeward sides,which fluctuate around zero;The windward and crosswind surfaces of downstream buildings are greatly affected,and the wind pressure on the windward surface is basically zero after being shielded.(3)The interference effect of the peak wind pressure under the full wind direction angle of the three-tower conjoined building is studied,and compared with the single building,the peak wind pressure of the adjacent building in the three-tower conjoined building is basically unchanged or even reduced,which is beneficial to the building;while the middle building will have the maximum positive pressure increase,which will adversely affect the building.(4)The wind vibration response and interference effect of the three-tower conjoined building were analyzed by finite element software.As a result,the wind vibration response of the three-tower conjoined building is quite different from that of the single building and the two-tower conjoined building,especially the intermediate building.