Simulation of bridge steel structure construction process based on BIM technology

With the rapid development of computer technology and information technology, bridge engineering is gradually transformed into information technology, and bridge BIM design technology is increasingly concern by the industry. This paper uses BIM technology to simulate the construction process of bridge steel structures. In order to solve the problem that the first model of BIM is too complicated, this paper utilizes the edge folding algorithm and quadratic error metric to refold the model and establish the new vertex coordinates, and at the same time, introduces the folding cost function to maintain the model characteristics. In the simulation experiments of the bridge structure construction, stress changes of the main girder of the bridge body are analyzed in various merging states. When the fitting error is +15mm, +25mm, and +35mm, the stress on the upper edge of the main girder near the top of the pier increases by 0.24MPa, 0.52MPa, and 0.78MPa, respectively, for the selection of materials and the prediction of construction and assembly parameters, in which the length of the steel girder N1 is accurate to the millimeters, which is 39940mm, and the single piece weighs 9,532.5kg. To prevent collision and interference with the bridge pier, the crane should be raised at a height of not less than 6.6m during the lifting stage. It can be seen that BIM technology can not only simulate and predict non-geometric factors such as the materials used but also simulate the margin of error and the bridge stresses as a way to help bridge projects on the ground.