| Because of the good characteristics of small density and corrosion resistance,the aluminum alloy latticed domes is gradually popularized in construction engineering field.However,redox reaction occurs frequently in the welding process of aluminum alloy material,and welding connection is not applicable to aluminum alloy structure.In order to solve this problem,Qinghua Han and other scholars put forward a new type of assembled hub joint,which makes it easy to the construction and installation of aluminum alloy latticed domes.In the practical project,the joint stiffness of new type of assembled hub joint belongs to semi-rigid joint,and compared with the latticed domes with rigid connection,the aluminum alloy latticed domes with semi-rigid joint has smaller overall stiffness and it is more susceptible to the effect of wind load.Therefore,this paper analyzes the wind pressure distribution and wind vibration response of the aluminum alloy single-layer latticed domes with new type of assembled hub joint under wind load,and provides a reference for the design and construction of the aluminum alloy latticed domes with new type of assembled hub joint.The main research content of this paper is to analyze the wind pressure distribution of aluminum alloy latticed domes with new type of assembled hub joint by CFD numerical simulation considering two-way fluid solid coupling,and calculate the wind pressure coefficient.Analyzing the influence of joint stiffness on the wind pressure distribution of the aluminum alloy latticed domes by comparing the simulation results of the aluminum alloy latticed domes with different joint stiffness.Studying the influence of joint stiffness on the displacement response and internal force response of latticed domes with different joint stiffness by wind vibration response analysis.And analyzing the and the variation law of wind vibration response of aluminum alloy latticed domes when the joint stiffness is reduced.The study found that the joint stiffness of aluminum alloy single-layer latticed domes has a significant effect on the wind pressure distribution and wind vibration response of the shell under wind load.The wind pressure distribution and mean wind pressure coefficient of aluminum alloy latticed domes will changes with the joint stiffness Under the action of pulsating wind load,the standard deviation of joint displacement and maximum displacement of joint will increase with decrease of joint stiffness.Therefore,attention should be paid to the influence of joint stiffness in the wind resistant design of aluminum alloy latticed domes with assembled hub joint. |
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