Optimal Design of Comb-Plate Expansion Joint of Highway Bridge
To reduce the cost of a certain type of a comb plate expansion device,ANSYS Workbench platform was used to carry out the lightweight design of the structure.First of all,the static strength and stiffness of the comb plate expansion joint under the limit condition of 100% opening were checked.Secondly,according to industry standards,a bearing capacity test of the comb plate expansion device under actual extreme conditions was carried out to verify the correctness of the simulation calculation.Fi-nally,the parameters that have a greater impact on the weight,stress and deformation of the telescopic device were selected as de-sign variables.The allowable stress and deformation of the device were used as constraints.The total weight of the device was tak-en as the optimization goal.Two different optimization methods were adopted to perform the lightweight design and its strength and rigidity have been verified.The results show that the optimized total weight was reduced by 38.06%,which meets the strength and stiffness requirements of the device.The feasibility of these two methods was verified,which provides an effective way for the study of lightweight design of bridge expansion device.
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