锈蚀Q345B钢力学特性试验及循环本构模型研究  

MECHANICAL PROPERTIES TEST AND CYCLIC CONSTITUTIVE MODEL OF CORRODED Q345B STEEL

作　　者：杨松 郑山锁[1,2] 田忠祥 明铭 徐玉海 王天坤 YANG Song;ZHENG Shan-suo;TIAN Zhong-xiang;MING Ming;XU Yu-hai;WANG Tian-kun(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an,Shaanxi 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Ministry of Education,Xi’an,Shaanxi 710055,China;Northwest Electric Power Design Institute Co,Ltd.of China Power Engineering Consulting Group,Xi’an,Shaanxi 710075,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055 [3]中国电力工程顾问集团西北电力设计院有限公司,陕西西安710075

出　　处：《工程力学》2025年第2期206-215,252,共11页Engineering Mechanics

基　　金：国家重点研发计划课题项目(2019YFC1509302);国家自然科学基金项目(52278530);陕西省重点研发计划项目(2021ZDLSF06-10)。

摘　　要：钢材锈蚀后的力学性能会发生劣化,已有研究主要关注低碳钢锈蚀后的静力拉伸性能。为研究Q345B低合金钢锈蚀后的力学特性,对22组Q345B钢材试件开展了人工加速腐蚀、单调拉伸与循环加载试验,分析了锈蚀对其单调拉伸和滞回性能的影响,并根据试验数据标定与验证了基于Chaboche模型的混合强化参数。结果表明:钢材单拉应力-应变曲线受锈蚀影响明显,各力学指标均随锈蚀率增加呈线性或非线性退化;循环累积损伤与锈蚀耦合作用会进一步加剧钢材变形能力劣化,同时钢材的耗能能力与循环强化作用亦会受到锈蚀影响;基于循环加载试验数据标定的材料混合强化参数,可较好地模拟锈蚀Q345B钢在循环荷载下的滞回性能,为后续在役钢构件及结构的剩余抗震能力分析评估提供支撑。The mechanical properties of steel will deteriorate after corrosion.The existing studies mainly focuses on the static tensile properties of low carbon steel.In order to study the mechanical properties of Q345B low-alloy steel after corrosion,tested are 22 groups of Q345B steel subjected to artificial accelerated corrosion,to monotonic tensile and cyclic loading.The effects of corrosion on monotonic tensile and hysteretic properties of materials were analyzed.Based on the Chaboche plastic constitutive model,the isotropic hardening and kinematic hardening parameters were calibrated and verified according to the test data.The results show that the tensile stress-strain curve of steel is obviously affected by corrosion,and all mechanical indexes show linear or nonlinear degradation with the increase of corrosion.The coupling effect of cyclic cumulative damage and corrosion will further aggravate the deterioration of steel deformation capacity,and the energy dissipation capacity and cyclic strengthening of steel will also be affected by corrosion.The hardening parameters calibrated can effectively describe the hysteretic performance of corroded Q345B steel and provide a support for the subsequent analysis of residual seismic capacity of steel members and structures in service.

关 键 词：锈蚀钢材 锈蚀损伤 力学性能 滞回性能 循环本构模型 

分 类 号：TU391[建筑科学—结构工程]