Loading-behavior tracing of an auxiliary steel structure used for a long-span arch bridge construction

Abstract

The chapter discusses the loading behavior tracing of an auxiliary steel structure used for a long-span arch bridge construction. Based on the construction conditions of an arch bridge spanned 132m, any temporary supporting structures and cable anchors cannot be positioned in the river during the bridge construction. Therefore, selection of the bridge construction scheme and the auxiliary structure design are much complicated and difficult. A suitable bridge construction scheme is proposed and the auxiliary structure is analyzed in the chapter. The loading behavior of the auxiliary structure during bridge construction is traced and presented in the chapter. The chapter explains that numerical results are valuable references for similar structures. The auxiliary structure system and the corresponding construction scheme are suitable for the bridge assembling. The front-stay cables and the lateral-stay cables are important for the no-working stage and hence cannot be omitted. The distance between a stay-cable and the corresponding tower foot should not be shorter than the tower height, otherwise the tower may not be stable during the bridge construction. The chapter also suggests the auxiliary structure system to be corresponding to a suitable construction scheme.