Papers by Author: Guo Tao Yang

Abstract: Main cables of self-anchored suspension bridge are anchored at each end of main girder, thus producing a self-balancing system. In order to transfer the cable force to main girder safely and smoothly, the anchorage region is one of the most critical issues in design of a self-anchored suspension bridge. It is hard to fully understand the mechanical behavior only by spatial beam and column model, so a 3D shell finite element model is established to overcome the limitation of spatial beam and column model. The mechanical behavior of initial designed anchorage structure is then analyzed and a modified anchorage fabrication is proposed to improve the stress distribution. Analysis results show that: the modified anchorage system effectively reduces the stress level of anchorage structure and enhances the efficiency of anchorage structure.

Abstract: Bridge decks in composite bridges endure local vehicle load directly and failure is apt to occur in bridge decks, so the decks in Jiubao Bridge were designed to be renewable components. Space finite element model of Jiubao Bridge was established. Stress variation of upper and lower edge of the girder under dead load was analyzed when each deck changed locally. Stress variation processes of various whole span replacement plans had been analyzed and the stress envelope was obtained. The calculation results show that local bridge deck replacement has no obvious influence on the steel girder stress. While the plan that remove bridge decks from mid-span to arch foot has less influence on the girder stress compared to other whole span replacement plan.

Abstract: The concrete decks in wide box composite girder bridge carrying vehicle load directly are easy to failure. So the decks in approach bridge of Jiubao Bridge are designed to renewable component. Several deck removal plans were put forward based on the structure characteristics of the Jiubao bridge. Spatial finite element model of the bridge was set up and the responses of approach bridge under different removal plan were analyzed. The analysis results show that methods proposed in this paper about deck removal in local position or in whole span are feasible; however different whole span removal method affect the mechanical behavior of the approach bridge heavily.