Structural Design and Performance Assessment of Prefabricated Aluminum Pedestrian Bridge
Aluminum alloy pedestrian overpasses have been widely used due to their advantages of light weight,high strength,and durability.However,traditional bridge structure design methods suffer from the problem of excessive simplification of analysis models,leading to significant deviation in results.To this end,this paper introduces a method for the structural design of the prefabricated aluminum pedestrian bridge.Taking a certain pedestrian bridge in Zhuhai as an example,a refined finite element analysis model of the bridge was established,and its strength,stiffness,and natural frequency were verified.The results showed that the stress of the truss beam was the highest,and the maximum tensile stress and maximum compressive stress were 15.5％and 14％of the design strength respectively,under the basic combination load.The stress of the truss beam under crowd load and dead load was similar;The maximum deflection of the overpass was 28％of the maximum allowable vertical deflection,and the width to span ratio of the overpass was 3.8 times the minimum allowable width to span ratio;The lateral and vertical natural frequencies of the pedestrian bridge were 1.92 times and 1.87 times the minimum allowable values,respectively,all of which met the requirements of the specifications.
万方数据
维普
