Study on Probability Characteristics of Concrete Carbonation for Bridges of Shenyang-Haikou Highway in Section of Liaoning Province(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2016年05期
- Page:
- 14-21
- Research Field:
- Publishing date:
Info
- Title:
- Study on Probability Characteristics of Concrete Carbonation for Bridges of Shenyang-Haikou Highway in Section of Liaoning Province
- Author(s):
- GONG Jin-xin; WANG Zhen-ji; MA Li-na; ZHAO Yan-hua; PENG Jian
- Faculty of Infrastructure Engineering, Dalian University of Technology
- Keywords:
- concrete bridge; concrete carbonation; probability model; highway; discreteness
- PACS:
- -
- DOI:
- -
- Abstract:
- Statistical analysis for concrete carbonation data acquired from bridges on Shenhai (Shenyang-Haikou) highway in section of Liaoning province was carried out, and stochastic process models regarding compressive strength of concrete and time as main parameters for bridges in different regions and individual bridge were developed. Taking the state of concrete carbonization to the surface of the reinforcement as the assumed durability limit state in the atmospheric environment, the durability failure probabilities of Haiwan bridge under different service time were analyzed. The results show that the carbonation depth of concrete decreases with increase of the compressive strength of concrete, but the carbonation depth has large discreteness due to various complex factors. The model uncertainty of concrete carbonation coefficient follows logarithmic normal distribution. The durability failure probability of Haiwan bridge is less than 10% at expire time of 100 years.
Last Update: 2016-09-30