锈蚀T形RC剪力墙数值模拟方法研究
引用文献：
刘华 郑山锁 郑跃 王乐意. 锈蚀T形RC剪力墙数值模拟方法研究[J]. 建筑结构，2023，48（07）：98-103.
LIU Hua ZHENG Shansuo ZHENG Yue WANG Leyi. Study on numerical simulation method of corroded T-shaped RC shear wall[J]. Building Structure，2023,48（07）：98-103.
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；
基金：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)。
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[3] 干伟忠，金伟良，高明赞.混凝土中钢筋加速锈蚀试验适用性研究[J].建筑结构学报，2011,32(2):41-47.
[4] 金伟良，夏晋，王海龙.外置电极模拟混凝土中钢筋非均匀锈蚀的加速试验方法：CN101782500A[P].2010-07-21.
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[8] WAUGH J D,SRITHARAN S.Nonlinear analysis of T-shaped concrete walls subjected to multi-directional loading[C]//Proceeding of the 9th U.S.National and 10th Canadian Conference on Earthquake Engineering.Toronto,2010.
[9] MANDER J B,PRIESTLEY M J N,PARK R.Theoretical stress-strain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1804-1826.
[10] VU N S,YU B,LI B.Stress-strain model for confined concrete with corroded transverse reinforcement[J].Engineering Structures,2017,151:472-487.
[11] DU Y G,CLARK L A,CHAN A H C.Residual capacity of corroded reinforcing bars[J].Magazine of Concrete Research,2005,57(3):135-147.
[12] 惠云玲，林志伸，李荣.锈蚀钢筋性能试验研究分析[J].工业建筑，1997,27(6):10-13,33.
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[15] 张伟平，商登峰，顾祥林.锈蚀钢筋应力-应变关系研究[J].同济大学学报(自然科学版),2006,34(5):586-592.
[16] ZHAO J,SRITHARAN S.Modeling of strain penetration effects in fiber-based analysis of reinforced concrete structures[J].ACI Structural Journal,2007,104(2):133-141.
[17] GHANNOUM W M,MOEHLE J P.Dynamic collapse analysis of a concrete frame sustaining column axial failures[J].ACI Structural Journal,2012,109(3):403-412.
Study on numerical simulation method of corroded T-shaped RC shear wall
Abstract: T-shaped reinforced concrete(RC) shear walls have good lateral resistance and are widely used in high-rise building structures. In the environment of chloride ion corrosion, with the increase of service age, the internal steel bar of RC shear wall will be corroded, which will cause the structural mechanics and seismic performance to deteriorate to varying degrees. Therefore, it is necessary to study the influence of steel corrosion on the seismic performance of T-shaped RC shear walls. The electrochemical accelerated corrosion technology of constant current-dry-wet cycle was used to conduct accelerated corrosion tests on 3 T-shaped RC shear wall specimens, and then pseudo-static tests were conducted to obtain hysteretic curves of each specimen; based on the existing research results, the constitutive models of concrete, steel bar and bond-slip were modified considering corrosion. The numerical analysis model of corroded T-shaped RC shear wall members was established by using OpenSees fiber element. The test results of T-shaped RC shear wall members under different corrosion degrees were verified. The results show that the established macro resilience force model of corroded RC shear wall can accurately simulate the mechanical properties and seismic performance of corroded T-shaped RC shear wall structures, 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 of shear wall
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