海洋大气区预应力混凝土结构氯离子侵蚀模型分析  

Analysis of chloride erosion model for pre-concrete structures in marine atmosphere zone

作　　者：徐洁[1] 李少龙 张少华 强南山 

机构地区：[1]江苏大学土木工程与力学学院,江苏镇江212013 [2]镇江市体育会展中心建设办公室,江苏镇江212000 [3]镇江市城市干道工程建设办公室,江苏镇江212001

出　　处：《混凝土》2014年第12期7-10,共4页Concrete

基　　金：国家自然科学基金项目(50908103;51278230);高等学校博士学科点专项科研基金项目(20123227110006);中国博士后科学基金(2012M511215)

摘　　要：结合已有预应力混凝土结构氯离子侵蚀模型,提出应力水平和环境因素(包括温度和湿度等)对在海洋大气区自由氯离子扩散的影响作用。利用连云港港区环境资料和码头预应力混凝土横梁氯离子浓度检测结果,得出服役39年后的预应力混凝土结构内的氯离子浓度分布状况及扩散参数。该地区氯离子浓度分布出现两个波峰,对应氯离子浓度峰值mmax1>mm ax2。在第二个波峰后,自由氯离子浓度分布曲线平滑下降,同时验证了该改进模型适用于现场实际工程。With the existing chloride ion erosion model for prestressed concrete structures has been used.It’s discovered that chloride ion diffusion are effect by environmental factors（including temperature and humidity and so on.）and the stress level in the marine atmosphere zone.Our investigation of the external environment in the Lian-yun-gang Port and the chloride ion concentration monitoring has showed that the pre-concrete structures which is service for 39 years has two extremes of its chloride ion distribution curve.There are two peaks in these chloride ion concentration distribution curve,as can be seen the corresponding chloride ion concentration values are mmax1〉mmax2.Af-ter the second peak,the free chloride ion concentration distribution curve smoothing down,and the diffusion parameters verify the model can be used in the marine environment.

关 键 词：海洋大气区 氯离子 预应力混凝土结构 环境因素 分布模型 

分 类 号：TU528.01[建筑科学—建筑技术科学]