Applied Mechanics and Materials Vols. 587-589

Abstract: Under the condition of the deep water reservoir area, the choice of bridge pier and long span continuous rigid frame beam construction methods are quite various. And the analysis of destruction of bridge depends mostly on the beam and piers. The paper cares mostly about these two parts.

Abstract: This paper presents the design of an experimental prestressed Vierendeel pedestrian bridge made of ultra-high performance concrete (UHPC). The structure is designed as a permanent single-span bridge with an intermediate deck. The span of the bridge structure is 61.38 m, the total width is 6.68 m, and the clearance width of the bridge is 5.30 m. The main structure of the bridge consists of two prestressed Vierendeel beams made of UHPC with dispersed steel fibres . The main beams are composed of prefabricated parts, subsequently prestressed.

Abstract: This paper presents the design of an experimental tensegrity pedestrian bridge. The structure is designed as a permanent three-span bridge with spans of 105 m. The bridge has two entrance ramps, three ground supports and one water support. The main structure of the bridge is designed as a light transparent structure based on the tensegrity principle using membranes.

Abstract: In the condition of the same span, to change the continuous curved bridge's curvature radius and under the dead load and moving load to compare how the internal force changes in different curvature radius. The finite element model is established to simulate the actual structure by Midas Civil. Results in a continuous curved bridge which main span of less than 60m, under the dead load, bending moment (-y) is unlikely to change, reinforced by a straight bridge can meet the requirements; under the moving loads, the curvature radius of the bending moment (-y) has little influence, should focus on increase in torque and bending moment (-z).

Abstract: Choosing the Panzhong Bridge of the Guangzhongjiang highway as the research object, the dynamic behavior and seismic performance of cable-stayed bridge with different auxiliary pier positions were studied. The results show that the position of the auxiliary pier has limited influence on dynamic behavior. Under the action of the earthquake, auxiliary pier restricts the deformation of side span effectively and reduces the bending moment at bottom of the pile caps.

Abstract: According to the study on the practical Chaolianxijiang bridge, the stress state of cable-pylon anchorage zone of cable-stayed bridge under two kinds of prestressed arrangements (that is, U-shaped arrangement and parallel arrangement) were calculated and compared. The results suggested that parallel prestressed arrangement could avoid the difficulty caused by other arrangements in the construction. Parallel prestressed arrangement with clear concept, simple structure, clear stress and small amount of work is suitable for the thick walled cable-pylon.

Abstract: The paper uses the finite element method to the specific structure of the linear buckling analysis to study the steel - concrete buckling coefficient changes when the changes and adjustments in the case of composite box girder structure different density transverse stiffening ribs buckling coefficient bracing spacing, Thus obtained that the almost linear relationship between the change in distance between the transverse stiffening ribs and buckling coefficient. Meanwhile get when bracing spacing when a valid range, coefficient of variation of buckling structure is not particularly obvious. Which is to adjust the spacing and lateral bracing number of stiffening ribs provide a space.

Abstract: Excessive prestressed loss in prestressed concrete continuous beam bridge and continuous rigid frame bridge causes structures appearing different types of diseases. By theoretical analysis on computational expression of effective prestress in curving hole, and distribution of contact stress and experiment about prestressed loss caused by frictional resistance, this paper points out the disadvantages of current effective prestress formula in curving hole. According to the research on the major influencing factors of prestressed loss in curving hole-contact status and friction coefficient μ, it plays a remarkable role on the further analysis of prestressed loss in curving hole.

Abstract: E-dong Yangtze River Highway Bridge is a compound double Tower Double Suspension Cable stayed bridge with a main-span of 926m. it has very distinctive geometric nonlinearity, which features as a long span, a high Tower, a soft construction, etc. in order to analyze how the geometric nonlinearity will affect the live load effect of large-span cable stayed bridge, we adopted the experimental results of the static experiments of the E-dong bridge to do a comparative analysis, during which all the calculation was based on the limited Factor theory. And the results showed that, the nonlinear results fit much better with the actual response of large-span cable stayed bridge, while the linear results produced a big difference.

Abstract: This paper deals with the experimental analysis of historical steel railway bridges, including the analysis of existing bridges performed in the last decades, derived from a comprehensive literature review. Many of the old railway bridges, which exists in Europe and around the world, are of riveted construction. These bridges were constructed during the second half of the 19th and the beginning of the 20th century, using mainly wrought iron and older steels. The continuously increasing loads and speeds during the last century, implies that these bridges are close to, or have already exceeded their design fatigue lives. Despite this, many of these are still in use appearing able to cope with current loading demands. Therefore, a comprehensive fatigue assessment methodology for riveted railway bridges becomes relevant in order to assure their safety and to prevent expensive cost of replacements. In this paper a comprehensive analysis of the literature is reviewed according to current knowledge on the matter, mainly dealing with experimental and theoretical analysis.