The Construction Monitoring And The Simulation Computation Of The Tongnan Bridge

Along with the rapid development of Chinese transportation enterprise, China's bridge construction has entered a peak period. Compared to other types of bridge, steel bridge has many advantages. It has strong competitive ability in the bridge type choice. The bridge construction monitors and controls is the important constituent of the bridge construction technology, it takes the condition of bridge designs as the achieving target. We can obtain the error between the bridge structure actual condition and the perfect condition through the real-time monitor of bridge structure actual condition and environment condition. By using the modern control theory we can distinguish, adjust and forecast the error, make the bridge construction condition approach to the perfect condition in maximum limit. Thus we can guarantee the bridge structure in construction process security. It will make the bridge completes condition of bridge structure to satisfy the design and the construction standard request.This article utilizes the finite element method as the rationale, uses the large-scale general computation software ANSYS to establish the Tongnan bridge entire model, combines the actual construction process of the Tongnan bridge, uses the Forward-calculation method of the bridge construction control method to carry on the simulation computation of the tongnan bridge scene construction, has obtained in the bridge construction process under various operating modes the important component stress value, the reaction of support and the control section displacement value, by this estimates the bridge job practice whether is safe and reasonable. In the tongnan bridge strain monitoring part, this article first introduced the tongnan bridge strain monitoring scheme. The scheme includes sensor choice, stress measuring point choice of location and arrangement, test time arrangement. Afterwards uses the advanced measuring instrument, carries on the real-time monitor and the control to each primary component stress. The results of measurement are compared with the theoretical ones, and through the graph form, vividly described each essential measuring point stress in the system conversion process change rule. Therefore more practical suggestion of improvement can be made for both design and construction. And it will guarantee the bridge security in the construction process, reduce the construction difficulty and speed up the construction progress.