Numerical Simulation On Wind Load Characteristics Of Suspend Reticulated Shell Under Typhoon

The large-span arch-supported reticulated shell structure is new and complex. So the fully floating designing becomes sensitive of wind load. The study of large large-span structure of wind load is mainly on grid roof structure, closing reticulated shell structure and cantilevered roof. The characteristics of wind load on fully floating designing large-span arch-supported reticulated shell is lack of study. Typhoon is a frequent natural disaster; especially in coastal urban areas. It has caused major natural disasters. Wind-induced failure of fully floating designing large-span arch-supported reticulated shell will occur under typhoon, and different wind angles, wind angles of attack and other factors will have prodigious impact on it. At present, there is no relevant provisions of fully suspended reticulated shells for wind loads in the Building structural load specification. Therefore, Researches on the impact of the hanging latticed shell surface wind load distribution and a variety of external factors are necessary. It can provide a basis for the design of structure, so that higher safety factor structure.Based on the characteristics of typhoon, this paper summarizes the advantages and disadvantages of several research methods and the current large-span spatial structure of wind characteristics of wind load status and structure and describes the theoretical basis and numerical simulation of the wind project. Based on these theories and methods, this paper Selects SSTk-? turbulence model which has good results on blunt bodies flowing around depending on fluid mechanics analysis software Fluent, and make a study of the wind pressure characteristics on complex bikini hanging reticulated shell with different angles and different attack angles of wind pressure on the upper and lower surfaces of the reticulated shell. The sensitive area of each shell pressure coefficient distribution reticulated shell wind loads and structural map are analyzed. The results show that wind angle, angle attack of wind change the rules for non-suspension roof surface pressure influence. The Shiyuan, Tianpu and conventional turbulence intensity which are based on measured data of typhoon are studied in the paper. By comparing the wind pressure coefficient value in different turbulence intensity, it shows that the three kinds of turbulence intensity can simulate typhoon wind field.This paper makes researches on wind pressure distribution on suspended reticulated shell the surface pressure of structure distribution on at different flow conditions, suspended reticulated shell surrounding environmental factors affecting changes in surface pressure distribution. As well as different environmental factors pressure distribution suspended reticulated shell surface conditions at the same software parameter settings. This paper also studied the suspension Shells envelope at different terrain height, the four impact factors of interference and influence their surrounding buildings arch beam, surface pressure distribution structure, will simulate the results obtained under different conditions for comparison. It shows that when suspended reticulated shell envelope surface wind load distribution undergone change greatly, and different wind angles under envelope make different effects on the net impact of the shell. When considering the surrounding buildings and arch beam surface size, pressure coefficient values become weak, and with increasing height hanging latticed shell which platform, network shell surface wind load will also increase accordingly.