基于现场检测数据的海工混凝土强度经时变化规律研究

Strength time-varying law of marine concrete based on field test data

混凝土的强度是直接影响结构承载力的重要参数,其经时变化规律是建立结构抗力变化模型的基础。针对海洋环境下混凝土结构受环境和荷载共同作用,随服役时间推移而出现的劣化损伤问题,本文共收集110例中国南方沿海服役1~35 a港口码头的检测案例,以混凝土实测数据为基础,采用相关分析和回归分析对海工混凝土强度随时间变化规律开展研究,明确了回弹法和钻芯法检测混凝土强度的相关性,获得了混凝土强度经时变化的计算模型,为海工混凝土结构安全性评估提供重要参考依据。

The strength of concrete is an important parameter that directly affects the bearing capacity of structure,and its warp time-varying law is the basis of building the model of structural resistance variation.For concrete structure under the marine environment by environment and load combination,along with the service time,and the degradation of injury problems.This paper has collected 110 cases of 1-35 years serving in the southern Chinese coastal ports test cases,based on the experimental data of concrete,using correlation analysis and regression analysis of marine engineering concrete strength time-varying law.The correlation between the rebound method and the drilling core method is clarified,and the calculation model of the time-varying concrete strength is obtained,which provides an important reference for the safety evaluation of marine engineering concrete structures.