影响PRC结构竖向齿槽接缝抗剪强度的因素

分析了各种因素对PRC结构竖向齿槽接缝抗剪强度的影响,指出:连接形式通过多种因素影响接缝抗剪;粘接影响接缝的破坏形式及接缝的抗剪强度;剪跨比增大,接缝抗剪强度降低;轴压力通过“剪切—摩擦”作用提供抗剪力;接合筋通过“剪切—摩擦”及销栓作用提供抗剪能力;接缝极限抗剪强度与缝宽无关,但剩余强度随缝宽增大而增大;反复荷载作用下,接缝抗剪强度退化等。对竖向齿槽接缝强度的设计提出了较为合理的方法。

Factors influencing the shear strength of vertical alveolus connection in PRC structures

Many factors which influence the shear strength of vertical alveolus connection in PRC structures were analyzed. The paper points out that: connection style influences the shear strength in many ways; adhesive bond affects the strength and failure style, too;the bigger is the ratio of shear to span,the lower the strength is; the axial compression offers shear strength through "shear-friction" action; the connection rod produces shear strength through "shear-friction" and dowel action; the ultimate shear strength has nothing to do with the connection width, but the residual strength increases with it; the shear strength degenerates under repeated loading. Reasonable design methods were advised, too.