曲线U型钢与混凝土简支组合梁受力性能研究

发布时间：2018-08-09 17:45

【摘要】：曲线U型钢与混凝土组合结构是在曲线梁和钢与混凝土组合结构的基础上发展起来的一种新型结构。钢与混凝土组合结构可以充分发挥混凝土的抗压性能和钢材的抗拉性能,也能有效的提高结构的稳定性和耗能性。而曲线梁凭借其明快流畅的线条不仅可以适应不同的地形地貌更能给人以美的享受。将两种结构形式巧妙的结合到一起便可扬长避短,发挥各自的优点。目前,我国对于曲线组合梁的研究相对较少,尚没有形成相关规范或规程。由于曲线钢与混凝土组合梁的结构特殊性,尚有许多技术难题有待于进一步研究。本文从理论上对曲线钢与混凝土简支组合梁的力学性能进行研究。从理论上,建立了承受竖向均布荷载、均布扭矩、对称集中荷载以及集中扭矩作用下曲线简支组合梁中混凝土板、U型钢梁的内力计算公式。利用弹性理论,建立曲线组合梁中混凝土板与U型钢梁界面滑移计算基本方程,给出了不同荷载工况下的界面滑移计算公式。计算结果表明：滑移量随荷载的增加而增加,随半径增加而减小,随连接刚度的增加而减少,混凝土强度等级对滑移的影响不大以及随混凝土板高度和宽度的增加而减小等。利用弹性理论,建立了曲线组合梁中混凝土板和U型钢梁轴向力计算基本方程,给出了不同荷载工况下的轴向力计算公式。计算结果表明：轴向力随半径增加而减少,并且当半径达到一定程度时,轴向力基本不随半径变化；轴向力随荷载值的增加而增加；混凝土强度等级对轴向力影响不大；连接刚度越大,轴向力值越大等。利用弹性理论,建立了曲线U型钢与混凝土简支组合梁在竖向均布荷载作用下的变形计算基本方程。
[Abstract]:Curved U-shaped steel and concrete composite structure is a new type of structure developed on the basis of curved beam and steel and concrete composite structure. The composite structure of steel and concrete can give full play to the compressive performance of concrete and the tensile property of steel, and can also effectively improve the stability and energy dissipation of the structure. Curve beam with its smooth lines can not only adapt to different landforms but also give people beautiful enjoyment. The combination of the two forms of structure together can take advantage of their strengths and weaknesses. At present, there are few researches on curved composite beams in our country. Due to the structural particularity of curved steel and concrete composite beams, there are still many technical problems to be further studied. In this paper, the mechanical properties of curved steel and concrete simply supported composite beams are studied theoretically. Theoretically, the formulas for calculating the internal force of concrete slabs in curved simply supported composite beams under the action of vertical uniform load, uniform distribution torque, symmetrical concentrated load and concentrated torque are established. Based on the elastic theory, the basic equations for calculating the interface slip between concrete slabs and U-shaped steel beams in curved composite beams are established, and the formulas for calculating the interface slippage under different load conditions are given. The results show that the slip value increases with the increase of load, decreases with the increase of radius, decreases with the increase of connection stiffness, and decreases with the increase of height and width of concrete slab. Based on the elastic theory, the basic equations for calculating axial forces of concrete slabs and U-shaped steel beams in curved composite beams are established, and the formulas for calculating axial forces under different load conditions are given. The results show that the axial force decreases with the increase of the radius, and when the radius reaches a certain degree, the axial force basically does not change with the radius, the axial force increases with the increase of the load value, and the strength grade of concrete has little effect on the axial force. The greater the connection stiffness, the greater the axial force. Based on the elastic theory, the basic equations for calculating the deformation of curved U-shaped steel and concrete simply supported composite beams under vertical uniform load are established.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398.9

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