桥梁建设抗风设计气候可行性论证 技术规范 Technical specification for climate feasibility demonstration of wind resistant design of bridge construction 发 布 湖南省市场监督管理局43 DB43/T2144—2021 湖南省地方标准 ICS CCS 07.030 A 47 2021-08发布-29 2021-10实施-29 DB43/T 2144—2021 I 目 次 前言 ································ ································ ································ ························ Ⅲ 1 范围 ································ ································ ································ ····················· 1 2 规范性引用文件 ································ ································ ································ ······ 1 3 术语和定义 ································ ································ ································ ············ 1 4 一般规定 ································ ································ ································ ··············· 3 5 气象观测塔建设及观测 ································ ································ ····························· 3 6 参证气象站选取及资料收集 ································ ································ ······················· 4 7 桥位区气候特征与气象灾害分析 ································ ································ ················· 5 8 设计风速推算 ································ ································ ································ ········· 5 9 桥位区近地层湍流特征值及风攻角计算 ································ ································ ········ 6 10 桥位区风参数数值模拟 ································ ································ ·························· 7 11 报告编制 ································ ································ ································ ·············· 7 附录A（规范性） 桥梁建设抗风设计气候可行性论证技术流程图 ································ ········· 8 附录B（规范性） t检验方法 ································ ································ ······················· 9 附录C（资料性） 比值法 ································ ································ ·························· 10 附录D（资料性） 概率分布函数 ································ ································ ················· 11 附录E（资料性） 地表粗糙度系数分类 ································ ································ ········ 14 附录F（资料性） 三维超声风速仪有效数据判别 ································ ···························· 15 附录G（资料性） 脉动风速的计算方法 ································ ································ ········ 16 附录H（资料性） 湍流功率谱密度的计算方法 ································ ······························· 17 参考文献 ································ ································ ································ ·················· 18 DB43/T 2144—2021 II DB43/T 2144—2021 III 前 言 本文件按照 GB/T 1.1 —2020《标准化工作导则 第1部分：标准化文件的结构和起草规则》的规 定起草。 请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。 本文件由湖南省气象局提出。 本文件由湖南省气象标准化技术委员会归口 。 本文件起草单位 : 湖南省气候中心、 湖南省交通规划勘察设计院有限公司、 湖南省气象科学研究所。 本文件主要起草人：曾向红、吴浩、李瑜、蒋元华、杜东升、段丽洁、吴贤云、汤亦豪、郭凌曜、 崔剑锋。 DB43/T 2144—2021 IV DB43/T 2144—2021 1 桥梁建设抗风设计气候可行性论证技术规范 1 范围 本文件规定了大型桥梁建设抗风设计气候可行性论证的工作流程、气象观测塔建设、资料收集及处 理、数值模拟、设计参数推算及报告编制等内容。 本文件适用于大型桥梁建设抗风设计气候可行性论证。 2 规范性引用文件 下列文件中的内容通过文中的规范性引用而构 成本文件必不可少的条款。其中，注日期的引用文件，仅 该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用于本文件 。 GB/T 35221 —2017 地面气象观测规范 总则 GB 50009 —2012 建筑结构荷载规范 GB 50057 —2010 建筑物防雷设计规范 GB 50135 —2019 高耸结构设计规范 JTG/T 3360 —01—2018 公路桥梁抗风设计规范 QX/T 118 地面气象观测资料质量控制 QX/T 423 —2018 气候可行性论证规范 报告编制 QX/T 426 —2018 气候可行性论证规范 资料收集 QX/T 436 —2018 气候可行性论证规范 抗风参数计算 QX/T 438 —2018 桥梁设计风速计算规范 QX/T 449 —2018 气候可行性论证规范 现场观测 QX/T 469 —2018 气候可行性论证规范 总则 3 术语和定义 下列术语和定义适用于本文件。 3.1 风速时距 wind speed interval 计算平均风速所使用的时间间隔。 ［来源： QX/T 438 —2018，2.1］ 3.2 地面粗糙度 surface ro ughness 反映地表起伏或地物、植被等高矮、稀疏的程度。 ［来源： QX/T 438 —2018，2.2］ 3.3 重现期 return period DB43/T 2144—2021 2 某一事件重复出现的平均间隔时间。 ［来源： QX/T 438 —2018，2.4］ 3.4 参证气象站 reference meteorological station 气象分析计算所参照或引用的桥梁所在地区或者邻近地区具有长年代气象数据的国家气象观测站。 注1：长年代一般不少于 30年。 注2：国