The truss of 32 1 highway rigid frame bridge is very important. Only in-depth understanding can we handle every detail better, and it is always good to get in touch with the surrounding environment. Zhong Da Consulting will explain the truss of 32 1 expressway rigid frame bridge.

Assembled highway steel bridge (referred to as "32 1" steel bridge for short) is a rapid assembled bridge designed on the basis of the original Bailey truss bridge in Britain and combined with China's national conditions and actual conditions. The material is 16Mn. "32 1" steel bridge is a temporary bridge structure, and the allowable stress of steel is increased by 30% according to the basic allowable stress. The allowable stresses used in the design of this bridge are determined as follows: 16 manganese steel tensile stress, compressive stress and bending stress:1.3× 2/kloc-0 = 273 MPa16 manganese steel shear stress:1.3×1. The bolt is spring steel 30cr-Mn-Ti0.85× 1 300 =105mpa 30cr-Mn-Ti0.45×1300 = 585mpa 2, and the section characteristics of steel beam (1). (2) The maximum span of "321"steel bridge is controlled by allowable bending moment in most cases, but it is controlled by shear force in some cases.

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