Experimental study on shear performance of bubble groove interface between precast UHPC and post cast normal concrete

被引：0
|
作者：
Guan D. [1 ,2 ]
Chen Z. [1 ]
Lin Z. [1 ]
Xu R. [1 ]
Liu J. [1 ,2 ]
Guo Z. [1 ,2 ]
机构：
[1] School of Civil Engineering, Southeast University, Nanjing
[2] The Key Laboratory of C & PC Structures of China Ministry of Education, Southeast University, Nanjing
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2021年 / 42卷
关键词：
Interface; Precast UHPC and post cast normal concrete; Shear bearing capacity; Static test; Ultra-high performance concrete;
D O I：
10.14006/j.jzjgxb.2021.S1.0048
中图分类号：
学科分类号：
摘要：
The bubble groove interface between precast UHPC and post cast normal concrete has the potential to be widely applied in precast UHPC-normal concrete composite components. To study the shear performance of bubble groove interfaces between precast UHPC and post cast normal concrete with consideration of the effect of sizes of bubble grooves under 25 mm and dowel rebars, six composite specimens with bubble groove interfaces, two monolithic reference specimens and two composite specimens with flat interfaces were designed and manufactured. Shear tests were conducted. The failure modes, load-displacement curves and shear strength of different specimens were compared. A theoretical equation was proposed to calculate the shear resistance of the bubble groove interfaces between precast UHPC and post cast normal concrete. The results show that damage mainly occurs at the normal concrete side. The interface formed by large-sized bubble wraps (25 mm) has a relatively high shear resistance. The proposed theoretical equation can generally be used to estimate the shear resistance of bubble groove interface between precast UHPC and post cast normal concrete, where the diameter of the bubbles is smaller than 25 mm. © 2021, Editorial Office of Journal of Building Structures. All right reserved.
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页码：426 / 432and455
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