(1 四川省建筑设计研究院有限公司, 成都 610095; 2 西安建筑科技大学土木工程学院, 西安710055; 3 河北大学建筑工程学院, 保定 071002)

摘要: T 形钢筋混凝土(RC)剪力墙具有良好的抗侧性能,被广泛应用于高层建筑结构中. 在氯离子侵蚀环境下,随着服役龄期增长,RC 剪力墙内部钢筋将发生锈蚀,从而引起结构力学及抗震性能发生不同程度劣化. 因此,有必要研究钢筋锈蚀对 T 形 RC 剪力墙抗震性能的影响. 采用恒电流-干湿循环的电化学加速锈蚀技术,对 3 榀 T 形RC 剪力墙试件进行加速锈蚀试验,进而进行拟静力试验,得到各试件的滞回曲线;基于既有研究成果对混凝土本构、钢筋本构和粘结滑移本构模型进行考虑锈蚀的修正,采用 OpenSees 纤维单元建立了锈蚀 T 形 RC 剪力墙构件的数值分析模型. 对不同锈蚀程度下 T 形 RC 剪力墙构件的试验结果进行验证,结果表明:建立的锈蚀 RC 剪力墙宏观恢复力模型能较为准确地模拟锈蚀 T 形 RC 剪力墙结构的力学性能及抗震性能,可为该类结构的抗震性能评估提供理论参考.

关键词: T 形 RC 剪力墙; 氯离子侵蚀; 锈蚀试验; 钢筋锈蚀; 剪力墙数值模型

中图分类号:TU375 文献标志码:A 文章编号:1002-848X(2023)07-0098-06

DOI:10. 19701 / j. jzjg. SADI2304

Study on numerical simulation method of corroded T-shaped RC shear wall

LIU Hua1, ZHENG Shansuo2, ZHENG Yue3, WANG Leyi1

(1 Sichuan Provincial Architectural Design and Research Institute Co. , Ltd. , Chengdu 610095, China; 2 Schoolof Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China; 3 College of CivilEngineering and Architectural, Hebei University, Baoding 071002, China)

Abstract: T-shaped reinforced concrete (RC) shear walls have good lateral resistance and are widely used in high-risebuilding structures. In the environment of chloride ion corrosion, with the increase of service age, the internal steel bar ofRC shear wall will be corroded, which will cause the structural mechanics and seismic performance to deteriorate to varyingdegrees. Therefore, it is necessary to study the influence of steel corrosion on the seismic performance of T-shaped RCshear walls. The electrochemical accelerated corrosion technology of constant current-dry-wet cycle was used to conductaccelerated corrosion tests on 3 T-shaped RC shear wall specimens, and then pseudo-static tests were conducted to obtainhysteretic curves of each specimen; based on the existing research results, the constitutive models of concrete, steel barand bond-slip were modified considering corrosion. The numerical analysis model of corroded T-shaped RC shear wallmembers was established by using OpenSees fiber element. The test results of T-shaped RC shear wall members underdifferent corrosion degrees were verified. The results show that the established macro resilience force model of corroded RCshear wall can accurately simulate the mechanical properties and seismic performance of corroded T-shaped RC shear wallstructures, which can provide a theoretical reference for the evaluation of the seismic performance of this type of structure.

Keywords:T-shaped RC shear wall; chloride ion erosion; corrosion test; corrosion of steel bar; numerical model ofshear wall

∗国家重点研发计划课题(2019YFC1509302),国家自然基金(52278530),陕西省重点研发计划项目(2021ZDLSF06-10).

第一作者:刘华,硕士,工程师,主要从事工程结构设计及研究工作,Email: liuhua0076@ 163. com.

[引用本文] 刘华,郑山锁,郑跃,等. 锈蚀 T 形 RC 剪力墙数值模拟方法研究[ J]. 建筑结构,2023,53(7):98-103. LIU Hua,ZHENG Shansuo,ZHENG Yue,et al. Study on numerical simulation method of corroded T-shaped RC shearwall[J]. Building Structure,2023,53(7):98-103.