Avantaj nan HD200 prefabrike Highway Steel Bridge

On the basis of the "321" steel bridge, HD200 steel bridge increases the truss height to 2.134 feet, so it has a much higher bearing capacity than the "321" steel bridge, the strength is increased by 33 percent , the stiffness is increased by 2.3 times, and the mid-span deflection is increased, also greatly reduced. In order to facilitate the installation and erection, the HD200 steel bridge has canceled the double-layer structure. According to the calculation, the HD200 steel bridge can be used to strengthen the four-row single-layer, which can be used instead of the "321" steel bridge to strengthen the three-row double-layer. Besides, the HD200 steel bridge can be assembled into a single-lane. In addition to the bridge, it can also be assembled into a two-lane bridge, thereby expanding the use range of the bridge.

Under the conditions of the same span and load, the HD200 steel bridge needs less truss pieces than the "321" steel bridge, which saves 30 percent of steel in a comprehensive comparison. Therefore, HD200 steel bridge not only absorbs the advantages of "321" steel bridge, such as fast speed, economy, wide adaptability, good systemic combination structure, strong interchangeability, easy assembly, etc., but also in strength, stiffness, fatigue resistance, stability and so on. And the overall performance and other aspects, there are major improvements and improvements. Therefore, the HD200 steel bridge can be used as a permanent or semi-permanent bridge.