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首页> 外文期刊>Steel & Composite Structures: An International Journal >Bond behaviors of shape steel embedded in recycled aggregate concrete and recycled aggregate concrete filled in steel tubes
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Bond behaviors of shape steel embedded in recycled aggregate concrete and recycled aggregate concrete filled in steel tubes

机译：再生骨料混凝土和钢管中填充骨料混凝土的型钢粘结性能

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Thirty one push-out tests were carried out in order to investigate the bond behavior between shape steel, steel tube (named steels) and recycled aggregate concrete (RAC), including 11 steel reinforced recycled aggregate concrete (SRRAC) columns, 10 recycled aggregate concrete-filled circular steel tube (RACFCST) columns and 10 recycled aggregate concrete-filled square steel tube (RACFSST) columns. Eleven recycled coarse aggregate (RCA) replacement ratios (i.e., 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100%) were considered for SRRAC specimens, while five RCA replacement ratios (i.e., 0%, 25%, 50%, 75% and 100%), concrete type and length-diameter ratio for recycled aggregate concretefilled steel tube (RACFST) specimens were designed in this paper. Based on the test results, the influences of all variable parameters on the bond strength between steels and RAC were investigated. It was found that the load-slip curves at the loading end appeared the initial slip earlier than the curves at the free end. In addition, eight practical bond strength models were applied to make checking computations for all the specimens. The theoretical analytical model for interfacial bond shear transmission length in each type of steel-RAC composite columns was established through the mechanical derivation, which can be used to design and evaluate the performance of anchorage zones in steel-RAC composite structures.
机译：为了研究型钢，钢管（命名为钢）和再生骨料混凝土（RAC）之间的粘结性能，进行了3​​1次推出试验，其中包括11根钢筋增强的再生骨料混凝土（SRRAC）柱，10根再生骨料混凝土填充圆形钢管（RACFCST）柱和10根再生骨料填充方形钢管（RACFSST）柱。 SRRAC标本考虑了11种再生粗骨料（RCA）替代率（即0％，10％，20％，30％，40％，50％，60％，70％，80％，90％和100％） ，本文设计了五个RCA替代率（即0％，25％，50％，75％和100％），同时设计了再生骨料-钢管混凝土（RACFST）标本的混凝土类型和长径比。根据测试结果，研究了所有可变参数对钢与RAC之间粘结强度的影响。发现在加载端的载荷-滑动曲线比在自由端的曲线更早出现初始滑动。另外，使用了八个实用的粘结强度模型对所有样本进行检查计算。通过机械推导建立了每种类型的钢-RAC复合材料柱界面粘结剪切传递长度的理论分析模型，可用于设计和评估钢-RAC复合结构锚固区的性能。

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