锈蚀钢材力学性能试验及等效本构模型研究  

Study on Mechanical Property Test and Equivalent Constitutive Model of Corroded Steel

作　　者：郑山锁[1,2] 田忠祥 杨松 穆长俊 明铭 ZHENG Shansuo;TIAN Zhongxiang;YANG Song;MU Changjun;MING Ming(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi’an 710055,China;Northwest Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Xi’an 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：《湖南大学学报（自然科学版）》2024年第3期111-120,共10页Journal of Hunan University:Natural Sciences

基　　金：国家重点研发计划资助项目(2019YFC1509302);国家自然科学基金资助项目(52278530);陕西省重点研发计划资助项目(2021ZDLSF06-10)。

摘　　要：为准确描述锈蚀钢材在循环荷载下的本构关系,对经人工加速腐蚀的16组Q355钢锈蚀试件进行单调拉伸及循环加载试验,得到锈蚀钢材的力学性能参数及其退化规律.分析锈蚀对钢材试件滞回性能的影响,基于Giuffre-Menegotto-Pinto(GMP)模型建立了锈蚀钢材的循环本构模型.结果表明:钢材的屈服强度、极限强度及对应的屈服应变、极限应变等力学性能随着锈蚀程度的增加呈线性退化趋势;锈蚀会削弱钢材的耗能能力,使得结构在往复荷载下的安全性难以保证;建立的锈蚀钢材的循环本构模型与试验结果吻合较好,可为腐蚀环境下的钢构件及结构的抗震性能评估提供支撑.To accurately describe the constitutive relationship of the corroded steel under cyclic loading,the mechanical properties and degradation rules of the corroded steel were obtained through the monostatic tensile and cyclic loading tests on 16 groups of corroded Q355 steel specimens subjected to artificially accelerated corrosion.The influence of corrosion on the hysteretic properties of steel specimens was analyzed,and a cyclic constitutive model of corroded steel was established based on Giuffre-Menegotto-Pinto(GMP)model.The results show that the yield strength,ultimate strength and corresponding yield strain,ultimate strain and other mechanical properties of steel show a linear degradation trend with the increase of corrosion degree;corrosion weakens the energy consumption capacity of steel,making it difficult to ensure the safety of the structure under reciprocating loads;the cyclic constitutive model of corroded steel is in good agreement with the test results,which can provide support for the seismic performance evaluation of steel members and structures in corrosive environments.

关 键 词：钢结构 锈蚀 力学性能 本构关系 

分 类 号：TU391[建筑科学—结构工程]