钢管混凝土抛物线空腹拱平面内轴压稳定性能研究

采取理论推导和数值模拟相结合的方式,对钢管混凝土抛物线空腹拱的平面内稳定性能进行深入研究。首先,使用有限元软件建立钢管混凝土抛物线圆管拱模型,与实验进行对比,证明建模方法的正确性;然后,推导出钢管混凝土抛物线空腹拱的换算长细比,研究空腹拱的位移发展趋势、对轴力发展趋势和弯矩发展趋势探讨变化情况;最后,根据有限元计算结果,使用考虑矢跨比的稳定系数修正公式,发现修正公式与有限元结果吻合度较好,能够用于指导工程设计。

In-plane Axial Compression Stability of Concrete-filled Steel Tubular Parabola Vierendeel Arch

The study mainly investigated the in-plane stability of concrete-filled steel tubular parabola Vierendeel arch byadopting methods of theoretical derivation and numerical simulation.Firstly , the finite element software was used toestablish the model of concrete-filled steel tubular circular arch , which was compared with the experiment to prove the cor-rectness of the modeling method.What''s more, the exquivalent slenderness ratio of parabola vierendeel arch was deduced,and the development trend of displacement , axial forwe and bending moment of Vierendeel arch was studied.Finmall ,accord-ing to the finite element calculation results , the molified formula of stability factor considering rise span ratio was used.Itwas found that the modified formula was in good agreement with the finite element results,and can be used to guide the en-gineering design.