Research on Construction Control of Irregular Steel-Arch Cable-Stayed Combination Bridges

In order to evaluate the construction quality of a bridge, the finished line-shape and the actual stress state are two key parameters to check whether it’s consistent with the design requirements. However, there are many factors during the construction to make the actual completion state deviate from what is theoretically expected. The main purpose of construction control is to detect the deviations and thus correct them, and at the same time to predict and control the potential deviations so as that the completion state of a bridge (including the finished line-shape and structural internal force) could meet its design requirements. North Central Bridge in Taiyuan City is an irregular cable-stayed bridge which has five spans, five anti-symmetric steel arches and five anti-symmetric cable planes. As the bridge has a special structure shape and the control of the steel arch shape during the construction is quite difficult, the finite element analysis software is employed to analyze the construction process, therefore to make the rational construction control scheme of the arch shape and the stress state. The analysis results of this construction control scheme can be used as reference for others similar bridges in the future.