Forming Method and Structural Sensitivity of Super-large Span Fish-belly Wheel-spoke Cable Truss Structure
The super-large span fish-belly wheel-spoke truss has a novel structure,which is difficult to construct and is greatly affected by processing error and construction deviation.Therefore,it is crucial to determine a reasonable and feasible construction method through extensive simulation calculations and analysis.Various errors and deviations are studied to find sensitive components such as cables and ear plates,which provide a basis for construction process control.The super-large span fish-belly wheel-spoke cable truss structure of Lusail Stadium was selected as the research object,the mechanical responses of internal forces and deformations in three different construction forming methods were analyzed and compared through numerical simulations of the construction process.The rationality and feasibility of the selected optimal forming method are verified by the construction monitoring results.By introducing some defects into the calculation model,the influences of cable length error and joint plate construction deviation on the internal force and deformation of the structure are studied.The simulation results show that the force of each cable truss is close and the changes are consistent,and the radial displacement of each ring cable is controlled within 800mm in the lifting process of the optimal scheme.The deviations between monitoring and simulation of radial cable forces are less than 10%.The machining error and construction deviation have great influence on the cable forces of one cable truss itself,but have little influence on the cable forces of truss intervals one and more than one trusses apart.
NETL
NSTL
万方数据
维普
