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(1 四川省建筑設(shè)計(jì)研究院有限公司, 成都 610095; 2 西安建筑科技大學(xué)土木工程學(xué)院, 西安710055; 3 河北大學(xué)建筑工程學(xué)院, 保定 071002)

摘要: T 形鋼筋混凝土(RC)剪力墻具有良好的抗側(cè)性能,被廣泛應(yīng)用于高層建筑結(jié)構(gòu)中. 在氯離子侵蝕環(huán)境下,隨著服役齡期增長(zhǎng),RC 剪力墻內(nèi)部鋼筋將發(fā)生銹蝕,從而引起結(jié)構(gòu)力學(xué)及抗震性能發(fā)生不同程度劣化. 因此,有必要研究鋼筋銹蝕對(duì) T 形 RC 剪力墻抗震性能的影響. 采用恒電流-干濕循環(huán)的電化學(xué)加速銹蝕技術(shù),對(duì) 3 榀 T 形RC 剪力墻試件進(jìn)行加速銹蝕試驗(yàn),進(jìn)而進(jìn)行擬靜力試驗(yàn),得到各試件的滯回曲線;基于既有研究成果對(duì)混凝土本構(gòu)、鋼筋本構(gòu)和粘結(jié)滑移本構(gòu)模型進(jìn)行考慮銹蝕的修正,采用 OpenSees 纖維單元建立了銹蝕 T 形 RC 剪力墻構(gòu)件的數(shù)值分析模型. 對(duì)不同銹蝕程度下 T 形 RC 剪力墻構(gòu)件的試驗(yàn)結(jié)果進(jìn)行驗(yàn)證,結(jié)果表明:建立的銹蝕 RC 剪力墻宏觀恢復(fù)力模型能較為準(zhǔn)確地模擬銹蝕 T 形 RC 剪力墻結(jié)構(gòu)的力學(xué)性能及抗震性能,可為該類結(jié)構(gòu)的抗震性能評(píng)估提供理論參考.

關(guān)鍵詞: T 形 RC 剪力墻; 氯離子侵蝕; 銹蝕試驗(yàn); 鋼筋銹蝕; 剪力墻數(shù)值模型

中圖分類號(hào):TU375 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):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

∗國(guó)家重點(diǎn)研發(fā)計(jì)劃課題(2019YFC1509302),國(guó)家自然基金(52278530),陜西省重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2021ZDLSF06-10).

第一作者:劉華,碩士,工程師,主要從事工程結(jié)構(gòu)設(shè)計(jì)及研究工作,Email: liuhua0076@ 163. com.

[引用本文] 劉華,鄭山鎖,鄭躍,等. 銹蝕 T 形 RC 剪力墻數(shù)值模擬方法研究[ J]. 建筑結(jié)構(gòu),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.