初明进, 刘继良, 侯建群, 任宝双. 带竖向接缝的空心模剪力墙受剪性能试验研究及承载力计算[J]. 工程力学, 2020, 37(1): 183-194. DOI: 10.6052/j.issn.1000-4750.2019.03.0083
引用本文: 初明进, 刘继良, 侯建群, 任宝双. 带竖向接缝的空心模剪力墙受剪性能试验研究及承载力计算[J]. 工程力学, 2020, 37(1): 183-194. DOI: 10.6052/j.issn.1000-4750.2019.03.0083
CHU Ming-jin, LIU Ji-liang, HOU Jian-qun, REN Bao-shuang. EXPERIMENTAL STUDY ON SHEAR BEHAVIORS AND BEARING CAPACITY OF SHEAR WALLS BUILT WITH PRECAST CONCRETE TWO-WAY HOLLOW SLABS WITH VERTICAL JOINTS[J]. Engineering Mechanics, 2020, 37(1): 183-194. DOI: 10.6052/j.issn.1000-4750.2019.03.0083
Citation: CHU Ming-jin, LIU Ji-liang, HOU Jian-qun, REN Bao-shuang. EXPERIMENTAL STUDY ON SHEAR BEHAVIORS AND BEARING CAPACITY OF SHEAR WALLS BUILT WITH PRECAST CONCRETE TWO-WAY HOLLOW SLABS WITH VERTICAL JOINTS[J]. Engineering Mechanics, 2020, 37(1): 183-194. DOI: 10.6052/j.issn.1000-4750.2019.03.0083

带竖向接缝的空心模剪力墙受剪性能试验研究及承载力计算

EXPERIMENTAL STUDY ON SHEAR BEHAVIORS AND BEARING CAPACITY OF SHEAR WALLS BUILT WITH PRECAST CONCRETE TWO-WAY HOLLOW SLABS WITH VERTICAL JOINTS

  • 摘要: 对5个带竖向接缝的空心模剪力墙试件开展了拟静力试验,研究了竖向接缝的连接性能,分析了轴压比、剪跨比、空心模内水平钢筋配筋量等关键参数对竖向接缝连接性能和墙体受剪性能的影响。结果表明:墙体未发生脆性破坏,破坏位移角均大于1/100,延性系数均大于或接近5.0,具有良好的变形能力;正常使用阶段竖向接缝完好,可保证装配单元的有效连接;轴压比由0.15提高至0.25,受剪承载力提高了11.8%,但峰值位移角降低了22.5%;随着剪跨比的提高,受剪承载力显著降低;空心模内水平钢筋配筋量提高56%,受剪承载力提高了11%。提出了四单元计算模型计算墙体的受剪承载力,计算值与实验值相差均小于6.5%,计算结果偏于保守,可用于预测带竖向接缝的空心模剪力墙的受剪承载力。

     

    Abstract: Based on the pseudo-static test of five shear walls built precast concrete two-way hollow slabs with vertical joints, the connection behavior of vertical joints is discussed. The effects of key parameters including axial compression ratio, shear span ratio and the number of horizontal reinforcement on the connection behavior of vertical joints and mechanical properties of shear walls have been studied. The result shows that the brittle failure is avoided, the ultimate displacement angle is larger than 1/100, and the displacement ductility ratio was larger than 5.0. During the application stage, the vertical joint is good and the connection between different horizontal assembly units is reliable. When the axial compression increases from 0.15 to 0.25, the shear bearing capacity increases 11.8%, but peak displacement angle decreases 22.5%. As the increase of shear span ratio, the shear bearing capacity decreases significantly. When the number of horizontal reinforcements increases 56%, shear bearing capacity increases 11%. In addition, considering the influence of an interface structure on shear stress, a four-element computational model can be used to calculate the shear bearing capacity as well asthe difference between calculated and experimental values. The difference is less than 6.5%. The model can be used to predict the shear capacity of precast concrete two-way hollow slabs.

     

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