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首页> 外文期刊>American Journal of Traffic and Transportation Engineering >Durability Design of a Sea-Crossing Bridge in Zhejiang, China
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Durability Design of a Sea-Crossing Bridge in Zhejiang, China

机译：浙江跨海大桥的耐久性设计

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摘要

Durability design of a sea-crossing bridge in Zhejiang Province was carried out. Exposure condition of the marine environment was divided into four zones, i.e., atmospheric zone, splash zone, tidal zone and subsea zone. Environment condition surrounding the bridge was introduced, and then the factors affecting the deterioration of the concrete structure were analyzed. It was found that the main factor was chloride ions invasion. Then a chloride ion intrusion model was built based on Fick's second law. Design parameters corrected by Fully Probabilistic Method were used. Besides, the effect of stress on chloride diffusion coefficient was also considered. Using a variety of supplementary cementitious materials, the concrete mix was examined by Rapid Chloride Migration Tests to meet durability requirements. Finally, through capillary crystalline technology, the resistance to chloride ion penetration was further enhanced.
机译：进行了浙江省跨海大桥的耐久性设计。海洋环境的暴露条件分为四个区域，即大气区域，飞溅区域，潮汐区域和海底区域。介绍了桥梁周围的环境条件，然后分析了影响混凝土结构劣化的因素。发现主要因素是氯离子入侵。然后根据菲克第二定律建立了氯离子入侵模型。使用通过完全概率方法校正的设计参数。此外，还考虑了应力对氯化物扩散系数的影响。使用多种辅助胶凝材料，通过快速氯化物迁移测试对混凝土混合物进行了测试，以满足耐久性要求。最后，通过毛细管结晶技术，进一步提高了对氯离子渗透的抵抗力。

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