（同济大学建筑工程系，上海 200092）
［摘要］为精确得到楼顶广告牌结构的基本自振周期，采用结构分析软件SAP2000针对楼顶广告牌自身钢结构、大楼结构、楼顶广告牌钢结构与下部钢筋混凝土大楼整体结构分别进行了广告牌结构基本自振周期的计算，结果表明：下部钢筋混凝土结构对楼顶广告牌风荷载计算有着较大的影响，整体结构的基本自振周期远大于单独钢结构基本自振周期，而与大楼结构基本自振周期相近，在计算楼顶广告牌结构风荷载时应综合考虑下部房屋结构的影响。分析结果对今后楼顶广告牌的设计和检测计算具有参考价值。
［关键词］楼顶广告牌；基本自振周期；计算方法
中图分类号：TU391文献标识码：A文章编号：1002-848X(2012)03-0075-03
Research on calculation method of basic natural vibration period of roof billboard structure
Shen Zhirong，Li Bingxin（Department of Building Engineering, Tongji University, Shanghai 200092, China）
Abstract:To obtain basic natural vibration period of roof billboard structure accurately, basic natural vibration periods of roof billboard steel structure, building structure, and roof billboard structure combined with reinforced concrete structure were calculated respectively by SAP2000 software. The results show that building structure has a great effect on natural vibration period of roof billboard structure. Basic natural vibration period of integral structure is far greater than that of roof billboard structure，but close to that of building structure. The influence of building structure should be considered when wind load of roof billboard structure is calculated. The conclusions provide a practical reference to the design and inspection calculation of roof billboard structure.
Keywords:roof billboard; basic natural vibration period; calculation method
作者简介：沈之容，博士，副教授，Email：shenzhirong@tongji.edu.cn。
参考文献
［1］GB 50009—2001建筑结构荷载规范［S］.2006年版.北京：中国建筑工业出版社，2006.
［2］CECS 148:2003户外广告设施钢结构技术规程［S］.北京：中国计划出版社，2003.
［3］DB 31/283—2002户外广告设施设置技术规范［S］.
［4］北京金土木软件技术有限公司，中国建筑标准设计研究院.SAP2000中文版使用指南［M］.北京：人民交通出版社，2006