DB34-T 4096-2022 公路混凝土斜拉桥锚拉板技术指南

34DB34/T4096—2022公路混凝土斜拉桥锚拉板技术指南Technicalguidelineforanchorageplateofhighwayconcretecable-stayedbridge2022-03-29发布2022-04-29实施安徽省市场监督管理局发布I本文件按照GB/T1.1—2020《标准13.13.23.33.43.53.623.74.1.3锚拉板应进行防腐处理，其中外露部分防腐应按环境腐蚀种类采用长效型涂层配套体系；埋于4.1.4锚拉板的构造应与设置处斜拉桥的主梁构造匹配，并应与设置处的预应力构造、普通钢筋构造34.1.5锚拉板的倾角应与拉索相适应，主拉板底边宜平行于主梁轴线并沿该处梁顶纵向布置，支承管4.1.7锚拉板宜进行实体有限元复核计算，见公式（σm≤fy/k1·····································4.2支承组件设计4.2.1支承组件一般由支承管、加劲环、锚垫板、顶4.2.2支承组件设计应符合下列规4b)支承管正截面抗压承载力应满足公式（2）要求：α1——支承管应力不均匀及局部稳定影响系数，采用附录A的常规锚拉板取Y0Tc≤2α2tzglzzfvd·············································）；）；4.3拉板组件设计5Y0Tc≤β1A1fd+β2A2fd·····································）；Y0Tc≤β3tzllzzfvd·································································）；64.4.1压接组件一般由压接板、上翼7k2=npμjFpk/Fck······································································(6)——压接板横桥向倾角；b)压接组件与混凝土结构的抗拉承载力应满足公式（7）要求：Y0Fcd≤npμdFpd+npnkφ1(Ac-As)fcd+npnkφ2Asfsd····································(7)8——抗剪开孔形状影响系数，宜通过试验确定，采用常规圆形开孔可取0.89；——抗剪钢筋强度折减系数，宜通过试验确定，一般可取0.76。c)压接板截面的抗拉承载力应满足公Y0Fcd≤φ3tyjlyjfd····································································(8)）；5.2加工9123456789支承管轴线与主拉板底边夹角(°)主拉板与压接板夹角(°)5.3安装12支承管轴线倾角(°)346.2检查b)特殊检查应由相应资质和能力的单位承担。特殊检查应对结构的安全耐久性提出明确结论和6.3维护（Dn-n）DL1BBBBBB注4：表中：n——拉索钢绞线根数；t1～t9——对应构件的厚度；其他符号示意见图A.1。a)坐标系原点设在索塔中轴线±0m处；X轴为顺桥向，正方向沿桥轴线指向锚拉板侧；Y轴为拉索悬链线