植筋搭接混凝土柱偏心受压性能试验研究

Experimental Study on the Behavior of Columns with Bonder Rebars under Eccentric Compression

对钢筋混凝土植筋搭接柱在静载作用下的偏心受压破坏进行了探索性的研究。通过试验,得到了试验柱的承载力与锚固长度、跨中弯矩与挠度、荷载与位于搭接段跨中截面受压区混凝土应变等关系曲线。试验结果认为,钢筋混凝土搭接柱在混凝土未被压坏的前提下,发生的钢筋锚固失效主要是锚固强度失效,并确认了植筋试件的薄弱面。另外,试件破坏时的粘结应力随锚固长度的增加逐渐减小。而对FISV360S植筋胶来说,锚固长度的增加能明显地提高试验梁的极限承载力。最后分别提出了临界锚固长度计算公式和试验柱极限承载力计算公式。

This paper presents experimental research on RC columns with bonded rebars under eccentric compression.From the text,we get the load-embedded depth curve,the moment-deflection curve,and the load-concrete stress curve.Before the concrete was crushed,the main reason of anchorage invalidation is the strength of the anchoring adhesive is not enough.We still learn that as the ultimate strength increasing,the bond stress is decreasing.And for FISV360S,the ultimate strength can be raised by increase the anchorage length.Finally,we give the formula of the critical anchorage length and the formula of the ultimate strength.