曲線U型鋼與混凝土簡支組合梁受力性能研究
[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.
【學(xué)位授予單位】:東北大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2013
【分類號】:TU398.9
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