论文部分内容阅读
为了有效评估海水冻融和侵蚀耦合作用后混凝土的力学性能,通过试验研究了海水冻融和侵蚀耦合作用下混凝土的力学性能退化规律,并基于连续损伤力学和经典破坏准则模型,建立了考虑混凝土干湿循环次数和海水冻融循环次数的Ottosen四参数强度准则,以及不同的冻融循环次数和海水干湿循环作用后混凝土的弹性模量和泊松比退化模型。分析结果表明:随着冻融循环次数和干湿循环次数的增加,混凝土轴心抗压强度、弹性模量逐渐下降,Ottosen强度准则的拉、压子午线纵坐标绝对值减小,混凝土的抗裂性能降低。
In order to effectively evaluate the mechanical properties of concrete after seawater freezing-thawing and erosion coupling, the mechanical properties of concrete under sea-water freeze-thaw and erosion coupling were studied through experiments. Based on the continuous damage mechanics and classical failure criterion model, Ottosen four-parameter strength criterion for the number of wet-dry cycles and seawater freeze-thaw cycles, as well as the different freeze-thaw cycles and the modulus of elasticity and Poisson’s ratio degradation model of the concrete after the wet-dry cycles. The results show that with the increase of the number of freeze-thaw cycles and the number of drying and wetting cycles, the axial compressive strength and elastic modulus of concrete decrease gradually. The absolute values of the pull and pressure meridional ordinates of Ottosen strength criterion decrease, Decreased performance.