Optimization of Boom Force and Construction Control of 130 m Arch with Bridge Medium-bearing Basket-Tie Steel
The finite element analysis software MIDAS Civil was used to study the Boshuiwan Bridge in Shijiazhuang City.The reasonable bridge state calculated by zero displacement method,rigid support continuous beam method and minimum bending energy method was compared and analyzed.The forward iteration method was used to calculate the boom tension of three different tensioning sequences,and the impact matrix method was used to correct the boom force value to determine the better tensioning se-quences.Based on the research results,the minimum bending energy method has a more uniform distri-bution of the boom force of the bridge,and the problem that the end boom force has a larger deviation from the middle boom force is basically eliminated,and the maximum bending moment of the arch rib is small.The overall distribution of bending moments at the end of the tie beam and the arch rib is more uniform.By comparing three different boom tensioning sequences,the tensioning sequence one is tensioning from the mid-span to the beam end,the tensioning sequence two is tensioning from the beam end to the mid-span,and the tensioning sequence three is the jumper tensioning.The tensioning sequence one is superior to the tensioning sequence two and the tensioning sequence three in terms of construction economy and rationality.Three groups of boom forces under different tension sequences are iterated.Although the maximum deviation value of boom force is reduced,the boom force calculated iteratively according to tension sequence 1 is better than that calculated iteratively according to tension sequence 2 and tension sequence 3.
万方数据
维普
