130 m中承提篮系杆钢拱桥吊杆力优化与施工控制
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U448.22

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国家自然科学基金资助项目(50175095)


Optimization of Boom Force and Construction Control of 130 m Arch with Bridge Medium-bearing Basket-Tie Steel
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    摘要:

    采用有限元分析软件MIDAS Civil对石家庄市泊水湾大桥进行研究,对采用零位移法、刚性支承连续梁法、最小弯曲能量法计算得到的合理成桥状态进行对比分析,利用正装迭代法计算三种不同张拉次序的吊杆张拉力,并用影响矩阵法修正杆力值,确定较优的张拉次序。研究发现,最小弯曲能量法得到的成桥吊杆力分布较均匀,端部杆力较中部杆力值偏差较大的问题基本消除,且拱肋最大弯矩较小,系梁和拱肋端部弯矩整体分布较均匀;对比三种不同的吊杆张拉次序,张拉次序一(由跨中至梁端依次张拉)从施工经济性和合理性等方面要优于张拉次序二(由梁端至跨中依次张拉)和张拉次序三(跳杆张拉);三组不同张拉次序下的吊杆力经过迭代,虽然吊杆力最大偏差值均有所降低,但是按照张拉次序一进行迭代计算的成桥吊杆力优于按照张拉次序二和张拉次序三迭代计算的成桥吊杆力。

    Abstract:

    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 sequences. Based on the research results, the minimum bending energy method has a more uniform distribution 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.

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李雪纯,梁辰奇,王慧东.130 m中承提篮系杆钢拱桥吊杆力优化与施工控制[J].河北工程大学自然版,2024,41(5):50-55,77

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  • 收稿日期:2023-10-23
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  • 在线发布日期: 2024-11-02
  • 出版日期: 2024-10-25
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