Accurate and Efficient Simulation of Cyclic Behavior of Diagonally Reinforced Concrete Coupling Beams

2019 ◽  
Vol 35 (1) ◽  
pp. 361-381 ◽  
Author(s):  
Sang Whan Han ◽  
Hyeyoung Koh ◽  
Chang Seok Lee
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Behavior ◽  
Empirical Equations ◽  
Coupling Beams ◽  
Backbone Curve ◽  
Seismic Performance Evaluation ◽  
Coupled Shear Wall ◽  
Forward Stepwise ◽  
Strength And Stiffness ◽  
Proper Values

Diagonally reinforced concrete coupling beams (DRCB) play an important role in coupled shear wall systems since these members dissipate most seismic input energy during earthquakes. For reliable seismic performance evaluation using nonlinear response history analyses, it is important to use an accurate analytical model for DRCBs. In this study, the Pinching4 model is used as a base model to simulate the cyclic behavior of DRCBs. To simulate the cyclic behavior of DRCBs using the Pinching4 model, the constituent modeling parameters for backbone curve, pinching, and cyclic deterioration in strength and stiffness should be computed. To determine the proper values of the constituent modeling parameters accurately and efficiently, this study proposes empirical equations for the modeling parameters using forward stepwise regression analyses. This study shows that the cyclic behavior of DRCBs is accurately simulated using the Pinching4 model with constituent parameters calculated from the proposed empirical equations.

scholarly journals Experimental Comparison Study on Cyclic Behavior of Coupled Shear Walls with Two-Level-Yielding Steel Coupling Beam and RC Coupling Beam

2018 ◽  
Author(s):  
Guoqiang LI ◽  
Mengde PANG ◽  
Feifei Sun ◽  
Liulian LI ◽  
Jianyun SUN
Keyword(s):  
Energy Dissipation ◽  
Lateral Displacement ◽  
Shear Walls ◽  
Shear Wall ◽  
Cyclic Behavior ◽  
Experimental Comparison ◽  
Coupling Beam ◽  
Coupling Beams ◽  
Coupled Shear Wall ◽  
Steel Coupling Beam

Coupled shear walls are widely used in high rise buildings, since they can not only provide efficient lateral stiffness but also behave outstanding energy dissipation ability especially for earthquake-resistance. Traditionally, the coupling beams are made of reinforced concrete, which are prone to shear failure due to low aspect ratio and greatly reduce the efficiency and ability of energy dissipation.  For overcoming the shortcoming of concrete reinforced coupling beams (RCB), an innovative steel coupling beams called two-level-yielding steel coupling beam (TYSCB) is invented to balance the demand of stiffness and energy dissipation for coupled shear walls. TYSCBs are made of two parallel steel beams with yielding at two different levels.  To verify and investigate the aseismic behaviour improvement of TYSCB-coupled shear walls, two 1/3 scale, 10-storey coupled shear wall specimens with TYSCB and RCB were tested under both gravity and lateral displacement reversals. These two specimens were designed with the same bearing capacity, thus to be easier to compare. The experimental TYSCB specimen demonstrated more robust cyclic performance. Both specimens reached 1% lateral drift, however, the TYSCB-coupled shear wall showed minimal strength degradation. Additionally, a larger amount of energy was dissipated during each test of the TYSCB specimen, compared with the RCB specimen. Based on the experimental results, design recommendations are provided.

Application of Steel Plates on the Retrofitting of Current Reinforced Concrete Coupling Beams

2013 ◽  
Vol 721 ◽  
pp. 714-719
Author(s):  
Cheng Bei ◽  
Shi Wei Li ◽  
Ray K.L. Su
Keyword(s):  
Reinforced Concrete ◽  
Shear Wall ◽  
Steel Plates ◽  
Structural Elements ◽  
Lateral Loads ◽  
Coupling Beams ◽  
Coupled Shear Wall

Coupling beams are essential structural elements of reinforced concrete coupled shear wall to resist earthquakes and other lateral loads. But many current reinforced concrete coupling beams are insufficient in resisting lateral loads due to their bad ductility. So a test of retrofitting methods of deep coupling beams with steel plates since their good performance in the ductility and deformation was made to find ways of improving the ductility of the beams, and the results of this retrofitting method prove good because of the incensement of the ductility, deformation and strength of the beams.

Development of new nonlinear dynamic response model of reinforced concrete frames with infill walls

2018 ◽  
Vol 21 (14) ◽  
pp. 2154-2168 ◽  
Author(s):  
Rabab Allouzi ◽  
Ayhan Irfanoglu
Keyword(s):  
Reinforced Concrete ◽  
Response Analysis ◽  
Hysteresis Model ◽  
Computationally Efficient ◽  
Concrete Frames ◽  
Backbone Curve ◽  
Damage State ◽  
Reinforced Concrete Frames ◽  
Infill Walls ◽  
Strength And Stiffness

The complex behavior of reinforced concrete frames with infill walls under earthquake loads requires a realistic conceptual model that recognizes changes in strength and stiffness occurring during loading. Accordingly, a new hysteresis model is developed in this article for such reinforced concrete frames to investigate the ultimate damage state given a ground motion. Using this model, the infilled frame can be represented as a single-degree-of-freedom system for computationally efficient dynamic in-plane response analysis. A backbone curve is developed first to provide an envelope within which load–displacement paths occur. Then, the load reversal effects are described and integrated into the backbone curve to obtain the hysteresis model. The hysteresis model developed in this article is checked using data from 11 laboratory experiments carried out by other researchers. The applicability of the hysteresis model is also illustrated on a laboratory specimen that was tested by other researchers under base excitation.

Behaviour and design of coupled slab–structural wall systems

1990 ◽  
Vol 17 (5) ◽  
pp. 705-723 ◽  
Author(s):  
M. Saeed Mirza ◽  
Albert K. W. Lim
Keyword(s):  
Reinforced Concrete ◽  
Concrete Slab ◽  
Phase 1 ◽  
Coupling Beams ◽  
Reinforced Concrete Slab ◽  
Structural Wall ◽  
Practical Guidelines ◽  
Strength And Stiffness ◽  
Shear Failures ◽  
Direct Models

This paper presents the results of tests on nine reinforced concrete slab-coupled structural wall subassemblages subjected to gradually applied reversing displacements simulating earthquake loadings. Two-third scale direct models of Taylor's Specimen No. 1 were used to study the effect of the following parameters in three phases: Phase 1, the effect of providing stirrups around the longitudinal slab steel; Phase 2, the effect of providing shallow reinforced concrete longitudinal and transverse concealed beams; and Phase 3, the effect of providing longitudinal drop panels. The experimental behaviour of the specimens is reviewed and discussed and suitable design recommendations are presented for strength and stiffness of slab–structural wall systems along with some practical guidelines to control damage in the coupling slab at higher levels of imposed deformations. Key words: coupled reinforced concrete slab–structural wall systems, damage, degradation of strength and stiffness, ductility ratio, earthquakes, gradually applied reversing displacements and loads, punching shear failures, reinforcement details, shallow coupling beams, yield lines.

Cyclic Behavior of Slender Reinforced Concrete Coupling Beams with Bundled Diagonal Reinforcement

2015 ◽  
Vol 27 (6) ◽  
pp. 661-668
Author(s):  
Sang-Whan Han ◽  
Kyoung-Hwan Yoo ◽  
Ki-Hak Lee ◽  
Myoung-Su Shin
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Behavior ◽  
Coupling Beams ◽  
Diagonal Reinforcement

scholarly journals Evaluation of a Macro Lump Plasticity Model for Reinforced Concrete Beam-Column Joint under Cyclic Loading

2020 ◽  
Vol 22 (2) ◽  
pp. 82-93
Author(s):  
Joko Purnomo ◽  
V. Octaviani ◽  
P. K. Chiaulina ◽  
Jimmy Chandra
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Reinforced Concrete Beam ◽  
Cyclic Behavior ◽  
Rc Beam ◽  
Simple Modification ◽  
Seismic Performance Evaluation ◽  
Spring Element ◽  
Macro Modeling ◽  
Column Joint

Lateral deformations of reinforced concrete (RC) frames under extreme seismic excitation are highly affected by the stiffness of their beam-column joints. Numerous models have been proposed to simulate the responses of RC beam-column joint under cyclic loading. Development of RC beam-column joint model based on macro modeling using spring elements becomes more popular because of its considerably simple application for seismic performance evaluation purposes. In this study, a simple modification to previously developed macro-spring element-based model for RC beam-column joint is done and is used to simulate the behavior of seven external and five internal RC joints under cyclic loading in SAP2000. The model consists of several spring elements to define column, beam, joint, and bond-slip responses according to its individual moment-rotation relationships. Overall, the analysis results show that the modified model can simulate well the cyclic behavior of RC beam-column joints when are compared to previously available experimental results

Sign in / Sign up

Export Citation Format

Share Document