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我們在此以前曾选定武汉長江大桥一个断面進行试验。(见兰州铁道学院学报1959年第1期)。試驗結果表明断面支撑系在豎直荷載下受力很大,但这次試驗僅系个别断面的模型,还不能反映支撑系杆件在整体桁架中受力的实际狀况。这次試驗是参考我國当前即將建造的某大桥的設計图紙,用鋼筋制成一个一联三跨的整个模型,以研究支撑系在整体桁架中的受力情况,試驗結果也証明:支撑系在豎直荷載下,受力仍相当可观。断面支撑系某些杆件如按原型分析,其强度比較弱一些,建議有关單位予以注意。
We have previously selected a section of the Wuhan Yangtze River Bridge test. (See Lanzhou Railway Institute Journal 1959 No. 1). The test results show that the cross-section support system is greatly stressed under vertical load. However, this test is only based on the model of some sections and does not reflect the actual situation of the support system rod being forced in the whole truss. The test is based on the design drawings of a bridge to be constructed in our country. The whole model of one-and-a-three spans is made of steel bars to study the force of the support system in the whole truss. The test results also prove that the support system Under vertical load, the force is still considerable. Some sections of the cross-section support system, such as prototype analysis, the strength of some weaker, it is recommended that the relevant units to be noted.