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Chongqing Chaotianmen Yangtze River Bridge with the main span of 552m is an urban bridge of double deck bridges for highway and rail, which need to verify fatigue security performance of the node on bottom chord . Through the calculation of the full bridge's space finite element, the node for study is determined as the M29 and calculate and calculate the internal force influence line of M29. Load...
In view of shortcomings such as premature convergence and oscillation in Simple Genetic Algorithms (SGA), the article adopts the method of adaptive adjusting for the probabilities of crossover and mutation. So the Improved Genetic Algorithms (IGA) is formed by adding the transgenic operator to SGA. And the optimum design program of steel box-concrete composite arch bridge based on improved genetic...
Chongqing Chaotianmen Yangtze Bridge with the main span of 552m is the steel truss continuous tied arch bridge. Track cross beams of the lower layer and nodes of main truss are connected by high-strength bolts. To verify fatigue security performance of this node connection, large-scale model of 1/2 is applied in node fatigue test. In the 2 million fatigue tests during design life, the high-strength...
Stiffness-internal force adjustment is a method which is applied in widening and reinforcement of old highway bridges. This method is that two new beams with larger rigidity are respectively built on both sides of the old bridge in order to make the old bridge unloading through the stiffness-internal force adjustment. This me- thod was successfully used for the reinforcement of Yingjing Bridge. Based...
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