【作者】 张文彬；

【导师】 周亦唐； 李睿；

【作者基本信息】 昆明理工大学 ， 道路与铁道工程， 2019， 硕士

【摘要】 随着道路等级的不断提高和建设规模的扩大,桥梁呈现出跨径不断增大、桥型不断丰富、结构不断轻型化的发展趋势,同时对桥梁建设的受力性能和综合效益也越来越重视。在这种背景和需求下,传统简支钢—混凝土组合梁桥虽然在一般情况下也能满足设计、建造和使用的要求,但是通过研究发现同样条件下,对传统简支钢—混凝土组合梁施加预弯技术后,预弯简支钢—混组合梁桥的混凝土压应力和结合面剪应力等方面的优势更为明显。本文基于传统简支钢—混凝土组合梁的理论,使之结合预弯组合梁的计算方法,提出了预弯简支钢—混凝土组合梁的概念。在提出并通过二者的理论对比以及有限元计算结果的对比,均验证了预弯简支钢—混组合梁的截面应力、结合面剪应力小于传统简支钢—混组合梁的核心论点。而通过对比预弯简支钢—混凝土组合梁的理论计算结果与有限元模型的计算结果,同式也验证了本文提出预弯简支钢—混凝土组合梁理论方法的有效性。更多还原

【Abstract】 With the continuous improvement of road grade and the expansion of construction scale,Bridges show the development trend of incre asing span,enriching bridge types and lightening structure.Meanwhile,more and more attention is paid to the mechanical performance and comprehensive benefits of bridge construction.Under this background and requirements,the traditional steel and concr ete composite girder bridge,although in general can also meet the requirements of design,construction and use,but the study is found that under the same conditions,the traditional steel concrete composite beams after applied preflexed technology,the advantages of concrete compressive stree and the joint shear stress of preflexed steel-concrete composite beams are more evident.Based on the theory of traditional simply supported steel-concrete composite beams,combined with the calculation method of prefl exed composite beams,the concept of preflexed steel-concrete composite beams is proposed.The theoretical comparison between the two and the comparison of the finite element calculation results show that the section stress and joint shear stress of the pre flexed steel-mixed composite beams are smaller than the core argument of the traditional steel-mixed composite beams.By comparing the theoretical calculation results of the preflexed steel-concrete composite beams with the calculation results of the finit e element model,the same fonnula also verifies the validity of the validity of theoretical method for preflexed steel-concrete composite beams.更多还原