再生钢管混凝土柱黏结滑移性能试验研究
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薛晓楠(1977—),女,硕士,研究方向为土木工程,消防。

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TU528

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Experimental Research on the Bond Slip Behavior of Recycled Concrete-Filled Steel Tubular Column
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    摘要:

    为了探讨再生钢管大骨料混凝土柱的黏结滑移性能,设计 8 根钢管再生大骨料混凝土柱,并对其进行推出试验,试验主要研究了取代率及界面黏结长度两个因素与初始黏结强度和极限黏结强度的关系,得到相应黏结滑移曲线。 结果表明:再生钢管大骨料混凝土柱的应力-滑移曲线主要经历了三个阶段,即无滑移阶段、上升阶段和下降阶段,加载端、中部及自由端全过程应力-滑移曲线具有相似性;取代率在一定范围内(0~40%),极限黏结强度随着取代率的增大而增大,在取代率为 40%时达到最大,初始粘结强度随着取代率的增大有所增大,但增大幅度不大,得到再生大骨料的最优取代率约为 40%;黏结界面长度在一定范围内(400~700 mm),初滑移黏结强度随着黏结界面长度的增加有所增加,但增幅不大,约为 0.001 MPa,而极限黏结强度随着黏结界面长度的增加有下降趋势。

    Abstract:

    To study the bond-slip performance of recycled aggregate concrete steel pipe column, eight large- scale aggregate concrete columns were designed and push tests were also carried out, which mainly studied the relationship between replacement rate as well as bond interface length and initial bond strength as well as ulti- mate bond strength. Then, the corresponding bond slip curve was obtained. The research results show that the stress-slip curve of the reinforced aggregate concrete column has three stages, namely, non-slipping stage, rising stage and descending stage. The stress-slip curves of the whole loading end, the middle and the free end share similarities. While the replacement rate is at a certain range (0~40%), the ultimate bond strength increases with the increase of replacement rate and reaches the maximum when the replacement rate is at 40%; the initial bond strength increases with the replacement rate, but the increase rate is not large. The optimal replacement rate of obtained large aggregates is about 40%. While the bonding interface length is at a certain range (400~700 mm), the initial slip bond strength increases with the bonding interface length, but the increase rate is not large, about 0.001 Mpa, but the ultimate bond strength decreases with the increase of bond interface length.

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薛晓楠,衷政杰.再生钢管混凝土柱黏结滑移性能试验研究[J].华东交通大学学报,2018,35(4):39-46.

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  • 在线发布日期: 2021-05-26
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