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首页> 外文期刊>Arabian Journal for Science and Engineering >Experimental Investigation of the Tensile Capacity for Anchor Groups with Different Spacing Between Cast-in-Place Headed Anchors of High Strength and Deep Embedment
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Experimental Investigation of the Tensile Capacity for Anchor Groups with Different Spacing Between Cast-in-Place Headed Anchors of High Strength and Deep Embedment

机译：高强度深埋埋头式锚固不同间距锚固组抗拉能力的试验研究

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摘要

The overall objective of this study is to investigate the tensile capacity for anchor groups of cast-in-place headed anchors with high strength and deep embedment at different spacing between anchors. Experimental tensile load tests were conducted on 12 reinforced concrete specimens for the anchor groups of cast-in-place headed 42CrMo anchor bolts of 36, 48, and 60 mm in diameter with an identical embedment of 35 times the anchor diameter. The spacing between the anchors of the test specimens varied from 2 to 5 times the outside diameter of the anchor. The applied tensile loadings, the anchor displacements relative to concrete surface, the strains along the embedment length of anchor bolts, the failure loads, and the failure modes were documented comprehensively. The tensile load-displacement curves of the anchor groups approximately followed a three-phase pattern: an initial linear segment, a curvilinear transition, and a final linear sector. The interpreted tensile load-carrying capacities of elastic limit and failure threshold were obtained. The interpreted elastic limit increased as the anchor spacing increased. However, the spacing between anchors had a different effect on the interpreted failure threshold of anchor groups. All the test specimens of anchor groups failed via concrete splitting rather than concrete cone breakout, following a brittle cracking failure pattern.
机译：这项研究的总体目标是研究高强度，深埋在不同锚间距的现浇带头锚的锚群的抗拉能力。在12个钢筋混凝土试样上进行了试验性拉力测试，测试了直径分别为36、48和60毫米的现浇带头42CrMo锚固螺栓组，其相同的嵌入量是锚固直径的35倍。测试样品的锚之间的间距是锚外径的2到5倍。全面记录了施加的拉伸载荷，相对于混凝土表面的锚固位移，沿锚固螺栓嵌入长度的应变，破坏载荷和破坏模式。锚固组的拉伸载荷-位移曲线大致遵循三相模式：初始线性段，曲线过渡和最终线性扇形。获得了解释的弹性极限和破坏极限的拉伸承载能力。解释的弹性极限随着锚间距的增加而增加。但是，锚之间的间距对锚组的失效阈值有不同的影响。遵循脆性破裂破坏模式，所有锚固组的试样都是通过混凝土劈裂而不是混凝土圆锥破裂而破坏的。

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