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.

引用

页码：426 / 432and455

共 28 条

[11] MUNOZ M, HARRIS D K, AHLBORN T M, Et al., Bond performance between ultra high-performance concrete and normal-strength concrete, Journal of Materials in Civil Engineering, 26, 8, (2014)
[12] TAYEH B A, BAKAR ABU B H, JOHARI MEGAT M A., Characterization of the interfacial bond between old concrete substrate and ultra high performance fiber concrete repair composite, Materials and Structures, 46, 5, pp. 743-753, (2013)
[13] FENG S, XIAO H G, LI H., Comparative studies of the effect of ultrahigh-performance concrete and normal concrete as repair materials on interfacial bond properties and microstructure, Engineering Structures, 222, (2020)
[14] HUSSEIN H H, WALSH K K, SARGAND S M, Et al., Interfacial properties of ultrahigh-performance concrete and high-strength concrete bridge connections, Journal of Materials in Civil Engineering, 28, 5, (2016)
[15] VALIPOUR M, KHAYAT K H., Debonding test method to evaluate bond strength between UHPC and concrete substrate, Materials and Structures, 53, 1, (2020)
[16] FARZAD M, SHAFIEIFAR M, AZIZINAMINI A., Experimental and numerical study on bond strength between conventional concrete and ultra high-performance concrete (UHPC), Engineering Structures, 186, pp. 297-305, (2019)
[17] ZHANG Xiaochen, Study of interface bond behavior between precast ultra high performance concrete repaired layer and existing concrete structure, pp. 17-51, (2016)
[18] XIE Zengkui, Model test and interface shear test of uhpc-nc composite beam bridge, pp. 15-53, (2018)
[19] SHAO Tengfei, Experimental study on the shear resistance of the interface between grooved uhpc precast beam and cast-in-place concrete bridge deck, pp. 22-63, (2020)
[20] DONG Z Q, WU G, ZHAO X L, Et al., Behaviors of hybrid beams composed of seawater sea-sand concrete (SWSSC) and a prefabricated UHPC shell reinforced with FRP bars, Construction and Building Materials, 213, pp. 32-42, (2019)

← 1 2 3 →