[摘要]国家标准《建筑结构荷载规范》此次修订是在全球气候变化、反恐以及经济全球化的背景下进行的。修订要点主要包括增加温度作用和偶然荷载内容，规范涵盖范围由直接作用扩充到间接作用。收集补充了我国最新的风、雪和气温气象数据，更新各城市基本雪压和风压值，填补建筑结构设计全国基本气温数据空白，以应对灾害性天气对工程结构安全构成的威胁。调整部分楼面及构件的活荷载，增加可变荷载考虑设计使用年限调整系数，完善并适当提升建筑结构的可靠水准。补充各类屋面的不均匀积雪分布情况，以提高大跨轻型屋面抗雪灾能力。规范修订全方位综合调整了风荷载水准，修订后的风荷载计算公式与参数更加通用透明，另外还增加了高层建筑横风向及扭转风振响应计算。
［关键词］建筑结构；荷载；规范；修订；雪荷载；风荷载；温度作用
中图分类号：TU312 文献标识码： A文章编号：1002-848X(2011)11-0012-04
Overview on the revision of Load code for the design of building structures of China
Jin Xinyang, Chen Kai, Tang Yi(CABR Technology Co., Ltd., China Academy of Building Research, Beijing 100013, China)
Abstract: Chinese national standard Load code for the design of building structures has been revised under the background of the change of global climate, anti-terrorist and globalization of economy. An overview on the main themes and points of revision were given. Thermal actions and accidental loads are added so that the scope of the code has been expanded from direct action only to indirect action. Based on the statistics of newly collected climate data, basic snow loads and wind loads were renewed and basic air-temperature were given all over the country to reduce the risk of structural damage coursed by natural disasters. The level of reliability is raised or improved comparatively by adjusting live loads of some floors and adding the factor of variable actions to consider the change of design working life. To improve the performance of light roof structures in snow-resist, some unbalanced snow load cases are added. Wind loads are revised and adjusted comprehensively, expressions and parameters for determining wind load are more transparent and international, and wind load level will be more reasonable. Calculating methods for across-wind and torsion dynamic response induced by wind are added based on the wind tunnel test investigation.
Keywords: building structure; load code; revision; snow load; wind load; temperature action
作者简介：金新阳（1955-），男，研究员，博士生导师，副总裁，研究方向：风工程与结构工程，Email：jinxinyang@cabrtech.com。
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