摘要
为探讨《公路钢筋混凝土及预应力混凝土桥涵设计规范(JTG D62)征求意见稿》4.1.9条补充的关于上部结构抗倾覆稳定系数验算中倾覆轴线的确定,分别通过理论推导和MIDAS有限元计算分析了直线和曲线梁桥结构倾覆轴线的选取。结果表明:选取不同倾覆轴线进行抗倾覆稳定系数验算,结果相差偏大。联端双支承,中间墩独柱支承的直线和曲线梁桥结构,当联端外侧支座连线以外无支座时,应选取此支座连线作为倾覆轴线进行验算;当联端外侧支座连线以外有支座时,倾覆轴线应选取为联跨跨中位置相邻支座的连线。
To further discuss the determination of overturning axis in the superstructure anti-overturning stability coefficient calculation supplemented in Clause 4.1.9 in The Draft for design Code of Highway Reinforced Concrete and Pre-stressed Concrete Bridges and Culverts(JTG D62), the article analyzes the selection of overturning axis of the straight line and curve beam bridge structures through the theoretical derivation and the MIDAS finite element calculation respectively. The results indicate that the selection of the different overturning axes to check the anti-overturning stability coefficient has the different results. For the straight and curve beam bridge structure with united end double bearing and the middle-pier single-column bearing, when there is no other bearing outside the united end lateral bearing connecting line,this bearing should be selected as overturning axis to check, and there is the bearing outside the united end lateral bearing connecting line, the overturning axis should be selected as the connecting line of the bearing of adjacent spans in the middle of the united span.
出处
《城市道桥与防洪》
2015年第4期46-49,9-10,共4页
Urban Roads Bridges & Flood Control
关键词
独柱墩
梁桥
抗倾覆稳定系数
倾覆轴
single-column pier,girder bridge,anti-overturning stability coefficient,overturning axis
