Three-Point Bending Behaviour of a Fabricated Concrete Connection with Steel Plate Hoop and Bolts

Dawei Yuan,Qingning Li,Jianpeng Sun,Weishan Jiang,Jiaolei Zhang,Francesco Colangelo

doi:10.1155/2021/5589668

Dawei Yuan, Qingning Li + Show 4 more

Open Access

https://doi.org/10.1155/2021/5589668

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Abstract

As the development of building industrialization and housing industrialization is speeding up in China, the application of precast concrete structure has been the research focus. The connection of prefabricated components is one of the key technologies in prefabricated concrete structure. So, a new type of column–column connection with steel plate hoop and bolts is proposed in this paper to promote the application of precast concrete structure. In order to reveal the flexural behavior and force transfer mechanism about this new type connection, six precast concrete beams and one integral casting beam were tested by the three-point bending under loading and unloading cycle. The comparative analysis is made between the new type connection and traditional integral cast-in-place member from the aspects of test phenomenon, failure mode, and load-deflection relationship. The analysis results show that the new type connection has the same bending bearing capacity as the integral casting member. Based on the analysis of the load-strain relationship of longitudinal reinforcement, bolts, and steel plate hoop, the moment transmission mechanism and theoretical calculation formula of the new type connection are proposed, and the theoretical calculation results are consistent with the experimental results.

Highlights

Building industrialization is speeding up in China in order to solve the increasingly prominent problems faced by the construction industry, such as environmental pollution, labor shortage, rising labor costs, and large amount of construction waste
The key factor limiting the popularization of precast concrete structures is the seismic performance of the joints. e failure of connections between precast concrete members in earthquake will lead to local failure and even the dispersion and collapse of the whole structure [1]. is view has been repeatedly proved in recent earthquakes, such as the 1994 Northridge earthquake in the United States, the 2010 Christchurch earthquakes in New Zealand, the 2011 Van earthquake in Turkey [2,3,4]
In order to develop the connection of precast concrete structure, China Academy of Building Sciences (CABR) carried out the national science and technology support project of

Summary

Introduction

Building industrialization is speeding up in China in order to solve the increasingly prominent problems faced by the construction industry, such as environmental pollution, labor shortage, rising labor costs, and large amount of construction waste. E main research results are as follows: tenon connection [6], groutinganchoring connection [7, 8], insertion connection [9], column-beam-plate stacking joint [10], and so on These connection forms have good mechanical properties, they have some weakness, such as complex construction procedures and slow construction speed [11,12,13]. Is new type connection effectively replaces the longitudinal bar connection in the construction site and improves the assembly speed This connection mode has a unique way to transfer bending moment, which is different from the traditional connection mode and bending mechanism of concrete filled steel tube [14], and there are few related studies. This connection mode has a unique way to transfer bending moment, which is different from the traditional connection mode and bending mechanism of concrete filled steel tube [14], and there are few related studies. erefore, it is necessary to study the flexural performance of this kind connection

Experimental Program

Analysis on Test Results

C30 C30 C30 C30 C30 C30 C30

Bending Mechanism Analysis

Analysis of Theoretical Analysis and Experimental Results

Conclusion