scholarly journals Structural Performance of PC Double Beam–Column Connection Under Gravity and Seismic Loading

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Jang-Woon Baek ◽  
Su-Min Kang ◽  
Tae-Ho Kim ◽  
Jin-Yong Kim
Keyword(s):  
Precast Concrete ◽  
Lateral Loading ◽  
Flexural Behavior ◽  
Structural Performance ◽  
Test Results ◽  
Moment Frame ◽  
Loading Test ◽  
Beam System ◽  
Double Beam ◽  
Secant Stiffness

AbstractRecently, 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.

scholarly journals An Experimental Study on the Flexural Behavior of Precast Concrete Modular Beam Systems Using Inserted Steel Plates

2021 ◽  
Vol 11 (9) ◽  
pp. 3931
Author(s):  
Kyong-Min Ro ◽  
Min-Sook Kim ◽  
Chang-Geun Cho ◽  
Young-Hak Lee
Keyword(s):  
Low Cost ◽  
Precast Concrete ◽  
Technical Problem ◽  
Steel Plates ◽  
Flexural Behavior ◽  
Structural Performance ◽  
Modular System ◽  
Beam Specimen ◽  
Structural Integration ◽  
Beam System

Recently, interest in using precast concrete (PC) modules has increased due to their better seismic performance than steel modules. However, they must be joined by additional elements to ensure structural integration between the modules. The essential aim of the precast concrete module is to ensure structural performance with appropriate connection methods. However, the technical problem of connecting PC modules still needs to be improved. This study proposed a PC modular beam system for improved structural and splicing performance, and simple construction. This modular system consisted of modules with steel plates inserted to improve integrity of modules, ease of construction, and low cost. The structural performance of the proposed PC modular beam system was evaluated by flexural test on one reinforced concrete (RC) beam specimen consisting of a monolithic beam, and two PC specimens with the proposed modular system. The results demonstrated that the proposed PC modular beam system achieved approximately 80% of the structural performance compared to the monolithic specimen, with approximately 1.3-fold greater ductility.

scholarly journals Flexural and Shear Performance of Prestressed Composite Slabs with Inverted Multi-Ribs

2019 ◽  
Vol 9 (22) ◽  
pp. 4946 ◽  
Author(s):  
Sun-Jin Han ◽  
Jae-Hoon Jeong ◽  
Hyo-Eun Joo ◽  
Seung-Ho Choi ◽  
Seokdong Choi ◽  
...  
Keyword(s):  
Shear Strength ◽  
Design Method ◽  
Precast Concrete ◽  
Flexural Behavior ◽  
Structural Performance ◽  
Design Codes ◽  
Analysis Model ◽  
Non Linear ◽  
Shear Performance ◽  
Flexural Analysis

Half precast concrete slabs with inverted multi-ribs (Joint Advanced Slab, JAS), which enhance composite performance between slabs by introducing shear keys at connections between the slabs and improve structural performance by placing prestressing tendons and truss-type shear reinforcements, have recently been developed and applied in many construction fields. In this study, flexural and shear tests were performed to verify the structural performance of JAS members. Towards this end, two flexural specimens and four shear specimens were fabricated, and the presence of cast-in-place concrete and the location of the critical section were set as the main test variables. In addition, the flexural and shear performance of the JAS was quantitatively evaluated using a non-linear flexural analysis model and current structural design codes. Evaluation results confirmed that the flexural behavior of the JAS was almost similar to the behavior simulated through the non-linear flexural analysis model, and the shear performance of the JAS can also be estimated appropriately by using the shear strength equations presented in the current design codes. For the JAS with cast-in-place concrete, however, the shear strength estimation results differed significantly depending on the way that the shear contributions of the precast concrete unit and cast-in-place concrete were calculated. Based on the analysis results, this study proposed a design method that can reasonably estimate the shear strength of the composite JAS.

LATERAL LOADING TEST ON JOINT OF ENDS OF PRECAST CONCRETE PILE AND STEEL TUBE COLUMN(Structures)

2006 ◽  
Vol 12 (23) ◽  
pp. 127-130 ◽  
Author(s):  
Akifumi TAKEDA ◽  
Hidetaka FUNAKI ◽  
Takashi YAMADA ◽  
Koji TOMINAGA
Keyword(s):  
Precast Concrete ◽  
Steel Tube ◽  
Lateral Loading ◽  
Loading Test ◽  
Concrete Pile

Low Reversed Cyclic Loading Test for New Precast Concrete Beam to Column Connection

2014 ◽  
Vol 1079-1080 ◽  
pp. 160-165
Author(s):  
Jian Bing Yu ◽  
Zheng Xing Guo ◽  
Dong Zhi Guan
Keyword(s):  
Cyclic Loading ◽  
Precast Concrete ◽  
Plastic Hinge ◽  
Control Factor ◽  
Test Results ◽  
Loading Test ◽  
Concrete Frame ◽  
Weak Beam ◽  
Bending Capacity ◽  
Column Joint

On the basis of the domestic and overseas scholars’ research, it is innovative to put forward a new precast frame beam-to-column connection. One full-scale beam-to-column connection in a precast concrete（PC）frame and a beam-to-column connection in a cast-in-place concrete structures were tested under uni-directional cyclic loading that simulated earthquake-type motions. The new-type beam-to-column joint in a precast concrete frame consisted of cast-in-place columns and precast beams. Test results showed that（a）The property and action of precast connections are similar to the cast-in-place connection, it showed that both precast connections and cast-in-place connection have similar seismic performance; (b) The cracking load of precast connection are similar to the cast-in-place connection; (c) All the columns of all specimens did not destroy, it illustrate that it conform to the strong column weak beam. (d) In this experiment test, because the control factor use the bending capacity of beam, it also play the same plastic hinge mechanism as the traditional component. All the longitudinal reinforcement destruction ahead of stirrup in beams, which should be confirmed the guiding ideology of strong shear weak bending. On the basis of the test results, design considerations for the beam-to column connection were recommended.

scholarly journals Structural Performance of a Precast Concrete Modular Beam Using Bolted Connecting Plates

2021 ◽  
Vol 11 (24) ◽  
pp. 12110
Author(s):  
Kyong Min Ro ◽  
Min Sook Kim ◽  
Chang Geun Cho ◽  
Young Hak Lee
Keyword(s):  
Precast Concrete ◽  
Steel Plates ◽  
Structural Performance ◽  
Modular System ◽  
Beam Specimen ◽  
Test Results ◽  
Reinforcing Bars ◽  
Bolted Connection ◽  
Modular Units ◽  
Modular Structures

In modular structures, prefabricated modular units are joined at the construction site. Modular structures must ensure splicing performance by connecting modular units sufficiently. The bolted connection using steel plates may suffer from alignment issues and corrosion problems. In a precast concrete (PC) modular system, there is difficulty grouting the sleeves when splicing reinforcing bars. This study proposed a PC modular beam using a bolted connecting plate to deal with issues in typical steel modules and PC modules. The structural performance was evaluated by flexural and shear tests on two monolithic beams and two proposed PC specimens. The test results showed that the structural performance of the PC modular specimen was 88% of that of the monolithic reinforced concrete (RC) beam specimen and 102% of the strength calculated by ACI 318-19. Therefore, the proposed PC modular system using bolted connecting plates can solve the problems observed in typical steel and PC modules and improve the structural performance.

scholarly journals Structural Performance of a Hybrid FRP-Aluminum Modular Triangular Truss System Subjected to Various Loading Conditions

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Dongdong Zhang ◽  
Yaxin Huang ◽  
Qilin Zhao ◽  
Fei Li ◽  
Feng Li ◽  
...  
Keyword(s):  
Stress State ◽  
Element Model ◽  
Flexural Behavior ◽  
Structural Performance ◽  
Bending Moments ◽  
Loading Test ◽  
Design And Optimization ◽  
Out Of Plane ◽  
Bridge Superstructure ◽  
The One

A novel hybrid FRP-aluminum truss system has been employed in a two-rut modular bridge superstructure composed of twin inverted triangular trusses. The actual flexural behavior of a one-rut truss has been previously investigated under the on-axis loading test; however, the structural performance of the one-rut truss subjected to an off-axis load is still not fully understood. In this paper, a geometrical linear finite element model is introduced and validated by the on-axis loading test; the structural performance of the one-rut truss subjected to off-axis load was numerically obtained; the dissimilarities of the structural performance between the two different loading cases are investigated in detail. The results indicated that (1) the structural behavior of the off-axis load differs from that of the on-axis load, and the off-axis load is the critical loading condition controlling the structural performance of the triangular truss; (2) under the off-axis load, the FRP trussed members and connectors bear certain out-of-plane bending moments and are subjected to a complicated stress state; and (3) the stress state of these members does not match that of the initial design, and optimization for the redesign of these members is needed, especially for the pretightened teeth connectors.

Structural performance of composite double beam system

2016 ◽  
Vol 19 (2) ◽  
pp. 283-298 ◽  
Author(s):  
Jae-Man Lee ◽  
Min-Jun Kim ◽  
Yong-Jun Lee ◽  
Sang-Woo Kim ◽  
Jung-Yoon Lee ◽  
...  
Keyword(s):  
Structural Performance ◽  
Beam System ◽  
Double Beam
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