Exprimental On Wind Load On Cylindrical Latticed Shell And Comparison In Variouse Codes

The large span coal storage structure with three centers cylindrical surface is sensitive to wind load,and the wind load is the main control load in structural design.At this stage,the wind load of this kind of reticulated shell structure is not yet mature.The wind load values given in the code are too rough.These regulations can not solve the wind load problem of the structure in practical engineering.In order to meet the coal storage capacity,technology,and environmental protection requirements,the cylindrical structure is often paired with coal in the end,and the effect on both sides of the opening state of different forms of influence on the wind load is not clear.The damage of large span cylindrical reticulated shell is mainly the damage of enclosure structure,and the extreme wind pressure is the main factor in destroying it.The wind pressure cylindrical shell corner position when the process does not satisfy the Gauss distribution,the none Gauss distribution estimation of extreme wind pressure on both sides,effects of different initial state and disturbance on the extreme wind pressure value is not clear.Therefore,the above problems are urgent to solve in the wind resistant design of cylindrical reticulated shell structures.This paper through the rigid model wind tunnel test,the wind load distribution of cylindrical reticulated shell structure,analysis of different wind angle,the end of the two opening state of wind load,wind load value is also given,which has a certain reference value for the design of similar structures in practical engineering.The main contents of this thesis are as follows:(1)the wind load on the cylindrical reticulated shell is studied by wind tunnel test.The wind load distribution characteristics under typical working conditions are given,and the influence of the opening state at the end and the opening form at both ends are summed up law.(2)based on the wind tunnel test results,the wind pressure time historycharacteristics and the distribution characteristics of the extreme wind pressure of the cylindrical reticulated shell are analyzed.The influence of the different opening states at the ends and sides on the extreme wind pressure values of the cylindrical reticulated shell is studied.(3)compare the calculation methods of wind load on building structures by comparing the codes of several countries and regions.