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本文提出了连续正交和斜交板梁桥活载弯矩的计算方法,并应用有限元法分析了112座连续梁桥,每座桥都具有五根预应力工型截面梁,跨度在24.4～36.6m之间,梁的中心距为1.8～2.7m,斜角α在0°～60°之间,为了保证结果的可靠性,还集中研究了起控制作用的桥,验证了设计参数和它们对活载分布的影响,当斜交角为60°时,内梁的弯矩接近正桥弯矩的71%,比边梁弯矩小20%。当进行跨度较大、梁间距较小、梁对板的相对刚度较小的桥设计时,由边梁控制设计。可以断定美国州际公路与运输工作者协会(AASHTO)规范在确定正桥外梁车轮荷载分布时。低估弯矩近28%。
In this paper, the method of calculating the live load moment of continuous orthogonal and skewed slab bridges is proposed. The finite element method is used to analyze 112 continuous beam bridges, each of which has five prestressed section beams with a span of 24.4 ~ 36.6m, the center distance of the beam is 1.8 ~ 2.7m and the bevel angle α is between 0 ° ~ 60 °. In order to ensure the reliability of the result, the bridge which plays the controlling role is also studied. The design parameters and Their influence on the live load distribution, when the skew angle is 60 °, the bending moment of the inner beam approaches 71% of the bending moment of the positive bridge and 20% less than the bending moment of the side beam. When carrying out the bridge design with larger span, smaller beam spacing, and lower beam-to-plate relative stiffness, the design of the side beam controls. It can be concluded that the American Association of State Highway and Transport Workers (AASHTO) codes determine the wheel load distribution on the outer side of the main axle. Nearly 28% of underestimated bending moments.