Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for calculating initial tension of beam-arch combined bridge suspender
The invention discloses a method for calculating the initial tension of a beam-arch combined bridge suspender. The method comprises the following steps: (1) establishing a finite element model of a beam-arch combined bridge; (2) removing suspenders from the finite element model, and reversely applying concentrated force with the magnitude being the bridge forming cable force value of each suspender to the two ends of the suspender; (3) calculating the relative deformation of the two ends of each suspender so as to obtain the initial tension T' of each suspender; (4) obtaining the initial strain of each suspender according to the relationship between the initial tension and the strain of the suspender, applying the initial strains to the suspenders in the original model, and calculating toobtain the internal force value F' of each suspender; (5) comparing the internal force value F' of each suspender with the bridging cable force value F of each suspender, calculating the relative error, and taking the maximum value delta max of the relative error; and (6) adjusting the initial tension of the suspender with the maximum relative error of the internal force value to (1 +/-delta max)T' if the delta max is greater than 3%, repeating steps (4)-(5), and outputting the final initial tension of each suspender if the delta max is less than or equal to 3%. The initial tension of the suspender can be quickly and accurately determined, so that the internal force of the suspender reaches a cable force value in a bridging state.
本发明公开了一种梁拱组合桥吊杆初张拉力的计算方法，包括以下步骤：(1)建立梁拱组合桥有限元模型；(2)在有限元模型中去除吊杆，在各吊杆两端位置反向施加大小为其成桥索力值的集中力；(3)计算吊杆两端的相对变形量，进而得到各吊杆初张拉力T′；(4)根据吊杆初张拉力与应变的关系得到各吊杆的初应变，并将其施加到原模型中的吊杆中，计算得到各吊杆内力值F′；(5)比较各吊杆内力值F′与其成桥索力值F，计算其相对误差，取相对误差最大值δ；(6)若δ＞3％，调整内力值相对误差最大的吊杆的初张拉力至(1±δ)T′，重复步骤(4)‑(5)，若δ≤3％，则输出各吊杆的最终初张拉力。本发明能快速准确地确定吊杆初张拉力，进而使吊杆内力达到成桥状态下的索力值。
Method for calculating initial tension of beam-arch combined bridge suspender
The invention discloses a method for calculating the initial tension of a beam-arch combined bridge suspender. The method comprises the following steps: (1) establishing a finite element model of a beam-arch combined bridge; (2) removing suspenders from the finite element model, and reversely applying concentrated force with the magnitude being the bridge forming cable force value of each suspender to the two ends of the suspender; (3) calculating the relative deformation of the two ends of each suspender so as to obtain the initial tension T' of each suspender; (4) obtaining the initial strain of each suspender according to the relationship between the initial tension and the strain of the suspender, applying the initial strains to the suspenders in the original model, and calculating toobtain the internal force value F' of each suspender; (5) comparing the internal force value F' of each suspender with the bridging cable force value F of each suspender, calculating the relative error, and taking the maximum value delta max of the relative error; and (6) adjusting the initial tension of the suspender with the maximum relative error of the internal force value to (1 +/-delta max)T' if the delta max is greater than 3%, repeating steps (4)-(5), and outputting the final initial tension of each suspender if the delta max is less than or equal to 3%. The initial tension of the suspender can be quickly and accurately determined, so that the internal force of the suspender reaches a cable force value in a bridging state.
本发明公开了一种梁拱组合桥吊杆初张拉力的计算方法，包括以下步骤：(1)建立梁拱组合桥有限元模型；(2)在有限元模型中去除吊杆，在各吊杆两端位置反向施加大小为其成桥索力值的集中力；(3)计算吊杆两端的相对变形量，进而得到各吊杆初张拉力T′；(4)根据吊杆初张拉力与应变的关系得到各吊杆的初应变，并将其施加到原模型中的吊杆中，计算得到各吊杆内力值F′；(5)比较各吊杆内力值F′与其成桥索力值F，计算其相对误差，取相对误差最大值δ；(6)若δ＞3％，调整内力值相对误差最大的吊杆的初张拉力至(1±δ)T′，重复步骤(4)‑(5)，若δ≤3％，则输出各吊杆的最终初张拉力。本发明能快速准确地确定吊杆初张拉力，进而使吊杆内力达到成桥状态下的索力值。
Method for calculating initial tension of beam-arch combined bridge suspender
一种梁拱组合桥吊杆初张拉力的计算方法
CHEN DAIHAI (Autor:in) / WANG WENZE (Autor:in) / LI YINXIN (Autor:in) / ZHOU SHUAI (Autor:in) / LI ZHENG (Autor:in) / XU SHIZHAN (Autor:in) / HE HONGXIA (Autor:in) / CHI JING (Autor:in)
10.04.2020
Patent
Elektronische Ressource
Chinesisch
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