裝配式混凝土剪力墻結(jié)構(gòu)水平縫抗剪機理及承載力計算方法綜述*
趙作周1，周劍1，侯建群2，任寶雙2
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（1 清華大學土木工程安全與耐久教育部重點實驗室，北京 100084；2 清華大學建筑設計研究院有限公司，北京 100084）
［摘要］歸納了現(xiàn)有裝配式混凝土剪力墻水平縫的連接方式和混凝土界面構(gòu)造，綜述了對界面抗剪機理的認識和國內(nèi)外規(guī)范中的水平縫受剪承載力計算方法。通過對一座剪力墻結(jié)構(gòu)中典型墻體水平縫受剪設計算例和對已有界面抗剪試驗結(jié)果的計算分析，比較了既有典型計算公式間的差異。發(fā)現(xiàn)現(xiàn)行規(guī)范中的計算公式均基于剪切摩擦理論，大多來源于新舊混凝土疊合面抗剪試驗研究成果，所有計算公式均保守估計了水平縫疊合面的受剪承載力，但其中一些公式對拼縫齒槽面的設計結(jié)果偏不安全?；谏鲜龇治觯ㄗh對水平縫疊合面可采用《裝配式混凝土結(jié)構(gòu)技術規(guī)程》（JGJ 1—2014）中的公式進行計算，對于拼縫齒槽面可參照《裝配式混凝土結(jié)構(gòu)技術規(guī)程》（JGJ 1—2014）或《預制裝配整體式房屋混凝土剪力墻結(jié)構(gòu)技術規(guī)范》（DB23/T1400—2010）進行計算；建議對現(xiàn)有裝配式混凝土剪力墻水平縫應根據(jù)界面類型做進一步系統(tǒng)的專門研究，考慮復合受力、材料性能、加載方式、軸向壓力及總受剪承載力限值等因素的影響，提出能準確預測、簡單方便的受剪承載力計算公式。［關鍵詞］裝配式; 剪力墻; 水平縫; 剪切摩擦; 受剪承載力中圖分類號：TU973.16, TU973.2 文獻標識碼：A 文章編號：1002-848X(2015)12-0040-08Review of studies on shear resisting mechanisms and calculating formulas of shear resisting capacity of horizontal joints in fabricated reinforced concrete shear wall structuresZhao Zuozhou1, Zhou Jian1, Hou Jianqun2, Ren Baoshuang2(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China; 2 Architectural Design and Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China)Abstract: Different detailing methods and concrete interfaces of horizontal joints in fabricated reinforced concrete shear wall structures have been summarized, and researches on shear resisting mechanisms and the available calculating formulas of shear resisting capacity have been reviewed. Typical formulas have been compared by a design example and analysis of shear resisting test results of concrete surface. The comparisons have revealed that the available formulas are mainly based on shearfriction theory and derived from the experiment results of the shear joint interface between the existing and the new concrete. The shear resisting capacities of the composite interface predicted based on the formulas are conservative. However, the shear resisting capacity of the horizontal joints with shear keys might be overestimated in some cases. The shear resisting capacity of the composite interface can be predicted by the formula in Technical specification for precast concrete structures（JGJ 1—2014）, the shear resisting capacity of joints with shear keys can be calculated by Technical specification for precast concrete structures（JGJ 1—2014）or Technical specification for concrete shear wall structure assembled with precast components（DB23/T1400—2010）. It has been proposed that a systematic study on shear behavior of horizontal joints of the existing fabricated reinforced concrete shear wall structures, and considering combined force condition，material property，limit of axial compression force and total shear resisting capacity should be carried out to get a reliable and friendly usable formula.Keywords:fabricated; shear wall; horizontal joint; shear friction; shear resisting capacity
*國家高技術研究發(fā)展計劃（863計劃）課題（編號2013AA041307），清華大學自主科研基金項目(2012THZ02-1)。作者簡介：趙作周，博士，副教授，Email：zzzhao@tsinghua.edu.cn。
