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本文介绍了三组不同矢(垂)跨比拱形张弦拱结构模型的静力与动力特性试验研究情况。模型静力试验包括全跨均布荷载、半跨活荷载、预应力张拉过程模拟以及极限承载力试验;模型动力特性试验测试了结构的自振频率与振型,其中质量块按拱下吊挂配重与拱上附着配重两种方式。试验结果与理论公式及有限元分析进行了比对,证明了理论公式的正确性和可靠性。静力试验得出了拱形张弦拱结构的线性特性、支座水平位移与跨中竖向挠度大小相当、预应力对支座水平位移的控制作用,动力特性试验给出结构的基本振型为反对称双半波、质量块的设置方式对自振频率与振型有较大差异等结论。本文研究成果对该新型结构的工程应用有较好的参考意义。
In this paper, the experimental and static research on the static and dynamic characteristics of three different arched arch-string arch structures with different sagittal (vertical) The model static test includes full-span uniform load, semi-span live load, prestressing tension process simulation and ultimate bearing capacity test. The model dynamic characteristics test tests the natural frequency and vibration mode of the structure, Hanging weights and attach weights on the arch in two ways. The test results are compared with the theoretical formula and the finite element analysis to prove the correctness and reliability of the theoretical formula. Static test results in the linear characteristics of arched arch-string arch structure, the horizontal displacement of the support is equivalent to that of the mid-span vertical deflection, and the prestressing force controls the horizontal displacement of the support. The dynamic characteristics test gives the basic vibration mode For the anti-symmetrical double half-wave, the setting mode of the mass has a greater discrepancy between the natural frequency and the mode shape. The research results of this paper have good reference meaning for engineering application of the new structure.