Structural Performance of PC Double Beam\u2013Column Connection Under Gravity and Seismic Loading

Jang-Woon Baek,Su-Min Kang,Jin-Yong Kim,Tae-Ho Kim

doi:10.1186/s40069-020-00439-4

Abstract

Recently, as a new precast concrete (PC) construction method for increasing economy and constructability, the PC double-beam system has been developed for factories or logistic centers, where construction duration is particularly important. In this study, half-scaled PC double beam–column connection was tested under gravity loading and cyclic lateral loading. The major test parameters included the use of the spliced PC column and the addition of reinforcement at the beam–column joint. In the gravity loading test, the flexural behavior of the PC double beam was investigated. The test results showed satisfactory flexural capacity at the PC double-beam section, validating the composite action between the PC and RC members. In the cyclic lateral loading test, the seismic performance of the PC double beam–column connection was investigated. Based on the test results, the failure mode, load-carrying capacity, deformation capacity, energy dissipation capacity, secant stiffness, and shear strength of the PC double-beam system were evaluated and compared with those of a conventional RC double beam–column connection. According to the test results, the structural performance of the PC double beam–column connection was comparable to that of the RC double beam–column connection and satisfied the acceptance criteria of moment frame in the ACI 374.1-05 provision.

Highlights

1 Introduction In recent years, various precast concrete (PC) construction methods have been developed to cope with the extensive construction demands of factories and logistics centers, where a shortening of construction duration is a particular concern for reducing the construction cost of buildings
5.1 Load‐Carrying Capacity and Deformation Capacity The theoretical load-carrying capacity of the beam–column connection designed based on the strong-columnand-weak-beam concept can be predicted by assuming yielding of flexural rebars at the critical section, as follows (Im et al 2010): l
This paper presents the test results of specimens with half-scaled beam–column connection with PC double beams under gravity loading or cyclic lateral loading, to investigate the integrity and structural capacity of the PC double beam–column connection

Summary

Introduction

Various precast concrete (PC) construction methods have been developed to cope with the extensive construction demands of factories and logistics centers, where a shortening of construction duration is a particular concern for reducing the construction cost of buildings. In PC construction, the PC slab constitutes the majority of all PC members. To reduce construction costs, new PC slab construction methods have been developed. The concept and shape of these methods For a typical duration-shortening-type PC system, which is commonly used in factories or logistics centers (Fig. 1a and b), PC beams are constructed first. On top of these, PC slabs are placed (Fig. 1b). By placing reinforcement and cast-in-place (CIP) concrete, the structural integrity among the PC beam, PC slab, and PC column is secured (Fig. 1c)

Methods

Results

Conclusion