Wind-Induced Response Of Wind-Structure Interaction Of Suspend-Dome

Suspend-dome is a spatial structure composed of single-layer lattice shell and tensioningsystem. This structure is sensitive to wind load and its nature frequency is low. So it is ofgreat importance to investigate the wind-induced response of wind-structure interaction ofSuspend-dome.In this paper, a span of 122 m, span ratio of 1/10, high-span ratio of 1/4 suspend-domestructure is taken for calculation example, and the improved tension-compensation method isused for structural morphological analysis to determine the initial structure shape and internalforces, and the validity of morphological analysis method in this paper is confirmed bycontrasting with the actual project data. Then the force-finding analysis of the overallstructure and tensioning system is conducted respectively. The analysis show that two kindsof force-finding ideas are validity, however the convergence and the efficiency of theforce-finding analysis of tensioning system is better than the other one. The morphologicalanalysis is carried out under the cases of with and without considering the effect of gravityand the results show that the gravity has a great impact on morphological analysis.The wind pressure distribution coefficient of structure is simulated by using the CFDtechnology and the simulated result were compared with the relevant wind tunnel test resultsto verify the effectiveness of CFD methods used in this paper. The wind pressure distributioncoefficient of rigidity and elasticity model were calculated for the subsequent analysis.AR method is adopted to simulate the fluctuating wind velocity time history and timehistory responsed analysis of the structure which considers the wind-structure interaction isconducted. The results showed that: when subjected to fluctuating wind, the maximum value,mean value and the standard deviation of node displacement response are occurred ondifferent nodes. The standard deviation of node displacement response with considering theeffect of wind-structure interaction is much larger than the value without considering thecoupling effect of the case, which is about 2-5 times that of the latter. Therefore, the impact offluid-structure interaction effect cannot be ignored.Wind-response of structural displacementto fluctuating wind loads is higher sensitivity than the response of internal force, and withconsidering fluid-structure coupling effect, the sensitivity of wind-induced response willgreatly increases. The wind vibration coefficients of the displacement is symmetric aboutcenter, and the maximum of its locates on the top of the structure, also the wind vibrationcoefficients of the displacement with considering fluid-structure coupling effect is greaterthan without considering fluid-structure coupling effect.