Huili Wang

The Characteristic of Prestressed Concrete Pier Seismic Crack

Through three dimensional finite element analyzes, overall cast-in-place prestressed concrete pier seismic crack characteristic is researched. The separation formula finite element model is established by means of bilinear reinforce model and Kent-R.Park concretes model, without considering slip between concretes and. reinforce. It compares and analyzes the seismic crack characteristic between prestressed concrete pier and reinforcement concretes pier. The results show that the prestressed reinforcement can reduce the tensile zone of concrete, put off the appearance of cracks, improved the stiffness of pier, and reduced the top displacement.

Fuzzy optimum model of semi-structural decision for bridge lectotype

In the process of concept design of bridges, it is necessary to select the best from feasible alternatives through comparison and filter. The criterion set, used to evaluate and select the satisfying alternative, consists of many qualitative and quantitative factors. Therefore, the selection is a problem of multi-criteria and semi-structural decision making. Different from traditional methods in semi-structural decision making, a new framework and methodology is presented in this paper for evaluation of bridge alternatives. First the criterion set is established for the evaluation of alternatives. Next, the approach is studied to construct the relative membership degree matrix, in which both qualitative and quantitative factors are consistent with the uniform calculating standard. Then a new weight-assessing method is developed for calculation of the weights based on the relative membership degree matrix. Finally, a fuzzy optimum model is adopted to select the satisfying bridge alternative. Finally a case study is given to show the efficiency and robustness of the new framework and methodology.

Living Load Nonlinear Analysis of Self-Anchored Cable-Stayed Suspension Bridges

Living load nonlinearity of self-anchored cable-stayed suspension bridges is studied in this paper. A self-anchored cable-stayed suspension bridge with a main span of 800m is analyzed with linear theory, second-order theory and nonlinear theory respectively. The moments and displacements of both the girder and the pylon under live load are acquired. Based on the results it is derived that the second-order theory can be adopted to analyze a self-anchored cable-stayed suspension bridge with a main span of 800m and the error is less than 6%.