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给出采用CFRP板加固的钢-混凝土结合梁的受力特性参数的数值分析研究结果。通过截面的弯矩~曲率关系来研究一些重要参数对截面受力特性的影响。这些参数包括混凝土的抗压强度、钢材的屈服强度、CFRP板的厚度、CFRP板极限应变和钢梁下翼缘的面积。此外,还采用梁格法分析各种荷载工况下典型的小跨度结合梁桥主梁损伤对总体荷载分布的影响。
The results of numerical analysis of the stress characteristics of steel-concrete composite beams strengthened with CFRP sheets are given. The influence of some important parameters on the mechanical properties of cross section is studied by the relationship between moment and curvature of the section. These parameters include the compressive strength of concrete, the yield strength of steel, the thickness of the CFRP board, the ultimate strain of the CFRP board and the area of the lower flange of the steel beam. In addition, the effect of main beam damage on the overall load distribution of typical small-span combined beam bridges under various load conditions is also analyzed by using the beamgrid method.