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(1 山東建筑大學(xué)土木工程學(xué)院, 濟(jì)南 250101; 2 濟(jì)南軌道交通集團(tuán)有限公司, 濟(jì)南 250101;3 同圓設(shè)計(jì)集團(tuán)有限公司, 濟(jì)南 250101; 4 東南大學(xué)土木工程學(xué)院, 南京 210096; 5 東南大學(xué)建筑設(shè)計(jì)研究院有限公司, 南京 210096)
摘要: 為研究槽口?無粘結(jié)水平接縫預(yù)制剪力墻壓彎承載力的計(jì)算方法,分析無粘結(jié)鋼筋“應(yīng)變滯后”引起的變形區(qū)段、受拉鋼筋應(yīng)力和相對界限受壓區(qū)高度的變化,考慮該變化提出了槽口?無粘結(jié)水平接縫預(yù)制剪力墻的壓彎承載力計(jì)算公式,并根據(jù)槽口?無粘結(jié)水平接縫預(yù)制剪力墻的低周反復(fù)試驗(yàn)進(jìn)行了驗(yàn)證,結(jié)果表明,試驗(yàn)值與理論值吻合較好. 分析無粘結(jié)度和無粘結(jié)長度對壓彎承載力的影響,結(jié)果表明,大偏心受壓時,無粘結(jié)度對承載力影響較小,小偏心受壓和界限狀態(tài)時,無粘結(jié)度越小,承載力越大;無粘結(jié)長度對承載力影響較小,可忽略. 對槽口?無粘結(jié)水平接縫預(yù)制剪力墻和現(xiàn)澆剪力墻的抗震性能進(jìn)行對比,結(jié)果表明,槽口?無粘結(jié)水平接縫預(yù)制剪力墻具有較高的延性及耗能能力,槽口使接縫處無滑移. 本研究提出了一種設(shè)置普通鋼筋無粘結(jié)段的預(yù)制剪力墻壓彎承載力的計(jì)算方法,期望能為工程應(yīng)用提供參考.
關(guān)鍵詞: 預(yù)制剪力墻; 槽口?無粘結(jié)水平接縫; 無粘結(jié)長度; 無粘結(jié)度; 壓彎承載力; 應(yīng)變滯后
中圖分類號:TU375 文獻(xiàn)標(biāo)志碼:A 文章編號:1002?848X(2022)16?0079?09
DOI:10. 19701 / j. jzjg. 20201147
Study on axial force?moment capacity of rabbet?unbonded horizontal connection precast shear wall
SUN Chongfang1,2, HUANG Xianghai3, LIANG Shuting4, ZHU Xiaojun5, LIU Jiabin4, SONG Yamin4
(1 School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China; 2 Jinan Rail Transit GroupCo., Ltd. , Jinan 250101, China; 3 Tong Yuan Design Group Co., Ltd. , Jinan 250101, China; 4 School of CivilEngineering, Southeast University, Nanjing 210096, China; 5 Architectural Design and Research Institute Co., Ltd.,Southeast University, Nanjing 210096, China)
Abstract: In order to study the axial force?moment capacity calculation method of rabbet?unbonded horizontal connection(RHC) precast shear wall, and analyze the changes of the deformation region, tensile rebar stress and the relativeboundary compressive height caused by the “ strain lag” of unbonded rebar. Considering the changes, the specificationformula to calculate the axial force?moment capacity of the RHC precast shear wall was proposed. The quasi?static cyclictests of RHC precast shear walls were performed, which was used to verify the axial force?moment capacity. The resultsshow that the theoretical value and test value matches well. The effects of unbonded level and unbonded length on the axialforce?moment capacity were studied. The results show that for large eccentric compression, the unbonded level has smalleffect on the capacity, but for the small eccentric compression and boundary damage, the smaller unbonded level leads to alarger capacity; the unbonded length has small effect on the capacity, which can be ignored. The seismic performance ofRHC precast shear wall was compared with that of cast?in?place (CW) shear wall, and the results show that RHC precastshear wall has higher ductility and energy dissipation capacity, and the rabbets make the connection no slip. A calculationmethod of axial force?moment capacity for precast shear wall structures with ordinary rebar unbounded region was proposed,which is expected to provide the reference for engineering applications.
Keywords: precast shear wall; rabbet?unbonded horizontal connection; unbonded length; unbonded level; axialforce?moment capacity; strain lag
∗國家青年自然科學(xué)基金項(xiàng)目(51908336),山東省重點(diǎn)研發(fā)計(jì)劃(重大科技創(chuàng)新工程)項(xiàng)目(2021CXGC011204).
第一作者:孫崇芳,博士,副教授,主要從事裝配式結(jié)構(gòu)的力學(xué)性能研究,Email: 654499641@ qq. com.
[引用本文] 孫崇芳,黃祥海,梁書亭,等. 槽口?無粘結(jié)水平接縫預(yù)制剪力墻壓彎承載力研究[ J]. 建筑結(jié)構(gòu),2022,52(16):79?87. SUN Chongfang,HUANG Xianghai,LIANG Shuting,et al. Study on axial force?moment capacity of rabbet?unbonded horizontal connection precast shear wall[J]. Building Structure,2022,52(16):79?87.
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