基于退化机理的混凝土桥梁耐久性环境区划

Environmental Zoning for Durability Performance of Concrete Bridges Based on Deterioration Mechanism

系统研究了桥梁耐久性设计的环境作用和区划.首先,从环境作用对混凝土桥梁的影响和导致的混凝土桥梁的耐久性病害出发找出不同区域混凝土桥梁耐久性退化的主要因素;其次,依托国家气象中心的气象资料对混凝土结构耐久性有显著影响的环境指标进行调查分析,获取代表城市的环境数据,对常规环境参数进行了调研;再次,借鉴现有的规范和标准,选择适当的区划参数对混凝土桥梁的工作环境进行了分类;最后,运用桌面地理信息系统软件ArcGIS绘制了全国耐久性环境区划图,得到了对应于不同环境参数的环境区划图表.

The environmental effects and zoning for the durability performance of concrete bridges were systematically studied. First, the major influence factors for concrete bridges in different places were investigated according to the environmental effects and the durability diseases. Then, the environmental indicators which had significant impact on durability performance of concrete bridges were investigated and analyzed on the basis of meteorological information data from the National Meteorological Center （ NMC ）. Subsequently, proper environmental parameters were chosen in order to classify the environmental conditions of concrete bridges by the current design codes and standards. Finally, the environmental zoning maps and tables for different environmental parameters were obtained by the ArcGIS software.