海港码头氯离子侵蚀环向分布规律研究*

对乍浦港圆形混凝土柱进行取粉检测,研究氯离子侵蚀的环向变异性。根据乍浦港的风况、波况,计算圆形截面混凝土柱在各个方位的累积风速、累积风压和波浪压强的环向分布。并通过灰关联分析得到了累积风速、累积风压和波浪压强与表面氯离子浓度、扩散系数之间的关联度。累积风压由于考虑了贝努利效应,比累积风速更能反映真实情况。为建立海港码头相似理论及耐久性评估体系提供依据。

Circumferential distribution of chloride penetration of seaport wharf

The circumferential variability of chloride penetration is analyzed based on the powder inspectioncollected from circular concrete column in Zhapu port. Then, the cumulative wind velocity, the cumulative wind pressure and wave pressure circumferential distribution at each direction of the circular concrete column are calculated according to the wind regime and wave conditions of Zhapu port. Also, using a grey analysis method, the correlations among the cumulative wind velocity, the cumulative wind pressure, the wave pressure and the surface chloride content, as well as the chloride diffusion coefficient are obtained. Finally, the research highlights the cumulative wind pressure which considers the Bernoulli effect and reflects a much real situation than cumulative wind velocity. The result of this research has a significant contribution to the similarity theory and durability evaluation system of seaport wharf.