Pushover Analysis of Reinforced Concrete Shear Wall with a Barbell-Shaped Cross Section Using Fiber Slices and Nonlinear Shear Spring

2015 ◽  
Vol 31 (9) ◽  
pp. 19-26
Author(s):  
Dae Han Jun
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Pushover Analysis ◽  
Shear Wall ◽  
Shear Spring ◽  
Nonlinear Shear ◽  
Shaped Cross Section

NONLINEAR ANALYSIS OF A BARBELL-SHAPED CROSS SECTION WALL USING FIBER SLICE

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Dae-Han Jun ◽  
Pyeong-Doo Kang
Keyword(s):  
Reinforced Concrete ◽  
Analytical Model ◽  
Cross Section ◽  
Cross Sections ◽  
Axial Load ◽  
Nonlinear Response ◽  
Shear Walls ◽  
Lateral Loads ◽  
Fiber Element ◽  
Shaped Cross Section

Reinforced concrete shear walls are effective for resisting lateral loads imposed by wind or earthquakes. This study investigates the effectiveness of a wall fiber element in predicting the flexural nonlinear response of reinforced concrete shear walls. Model results are compared with experimental results for reinforced concrete shear walls with barbell-shaped cross sections without axial load. The analytical model is calibrated and the test measurements are processed to allow for a direct comparison of the predicted and measured flexural responses. Response results are compared at top displacements on the walls. Results obtained in the analytical model for barbell-shaped cross section wall compared favorably with experimentally responses for flexural capacity, stiffness, and deformability.

scholarly journals Influence of the flanges width and thickness on the shear strength of reinforced concrete beams with T-shaped cross section

2019 ◽  
Vol 188 ◽  
pp. 506-518 ◽  
Author(s):  
Alberto Ayensa ◽  
Eva Oller ◽  
Beatriz Beltrán ◽  
Elena Ibarz ◽  
Antonio Marí ◽  
...  
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Cross Section ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Shaped Cross Section

Displacement-based seismic design of regular reinforced concrete shear wall buildings

2011 ◽  
Vol 38 (6) ◽  
pp. 616-626 ◽  
Author(s):  
JagMohan Humar ◽  
Farrokh Fazileh ◽  
Mohammad Ghorbanie-Asl ◽  
Freddy E. Pina
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Pushover Analysis ◽  
Shear Wall ◽  
Base Shear ◽  
Ductility Demand ◽  
Inelastic Demand ◽  
Displacement Based ◽  
Ductility Capacity ◽  
Shear Demand

A displacement based method for the seismic design of reinforced concrete shear wall buildings of regular shape is presented. For preliminary design, approximate estimates of the yield and ultimate displacements are obtained, the former from simple empirical relations, and the latter to keep the ductility demand within ductility capacity and to limit the maximum storey drift to that specified by the codes. For a multi-storey building, the structure is converted to an equivalent single-degree-of-freedom system using an assumed deformation shape that is representative of the first mode. The required base shear strength of the system is determined from the inelastic demand spectrum corresponding to the ductility demand. In subsequent iterations a pushover analysis for the force distribution based on the first mode is used to obtain better estimates of yield and ultimate displacements taking into account stability under P–Δ effect. A multi-mode pushover analysis is carried out to find more accurate estimates of the shear demand.

Evaluation of the level of seismic protection afforded to reinforced concrete shear wall systems

1999 ◽  
Vol 26 (5) ◽  
pp. 572-589 ◽  
Author(s):  
Brian Stonehouse ◽  
Arthur C Heidebrecht ◽  
M Reza Kianoush
Keyword(s):  
Reinforced Concrete ◽  
Pushover Analysis ◽  
Time History ◽  
Shear Walls ◽  
Shell Element ◽  
Shear Wall ◽  
Lateral Force ◽  
Damage Potential ◽  
Existing Building ◽  
Torsion Element

This paper presents the results of an investigation into the seismic level of protection afforded to reinforced concrete shear wall systems. The vulnerability and damage potential of a 30-storey building consisting of a coupled shear wall as well as noncoupled shear walls as lateral force resisting systems is evaluated. The structure, which is similar to an existing building designed and constructed in Vancouver, is designed in accordance with the 1995 National Building Code of Canada and detailed using the provisions of CAN3-A23.3-M94 (1994). Elastic analysis is performed using both two-dimensional and three-dimensional shell element models for lateral loading with and without the effects of torsion. Element design specifications are used to create moment curvature envelopes to describe the members (beam and wall) deformation characteristics. These characteristics are incorporated into the nonlinear pushover analysis and dynamic inelastic time history analysis. The level of protection investigation illustrates that the coupled and noncoupled shear wall systems exhibit excellent performance following excitations of two and three times the design level earthquake. Maximum interstorey drift and element damage levels are within the acceptable limits for life-safe performance.Key words: seismic, reinforced concrete, shear walls, coupling beams, performance, inelastic, dynamic, design.

Practical Calculation Method for Crack Torque and Ultimate Torque of Special-Shaped Columns under Actions of Pressure and Torque

2011 ◽  
Vol 105-107 ◽  
pp. 1004-1007
Author(s):  
Ming Jiang ◽  
Yu Ye Xu ◽  
Zheng He Qiu ◽  
Yi Luo
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Calculation Method ◽  
Experimental Results ◽  
Practical Calculation ◽  
Calculation Formula ◽  
Data Regression ◽  
Combined Actions ◽  
Rectangular Columns ◽  
Shaped Cross Section

The experimental results of crack torque and ultimate torque of six reinforced concrete special-shaped columns under the combined actions of pressure and torque were presented firstly. Then, the calculation formula suggested by the Chinese Code for Design of Concrete Structures for the crack torque and ultimate torque of rectangular columns under the actions of pressure and torque were used for reference to determine the expression forms of crack torque and ultimate torque of special-shaped columns. Moreover, the special-shaped cross section was dealt as a combination of two rectangle cross section. A practical calculation method for crack torque and ultimate torque was proposed by data regression of experimental results.

Vertical Seam Effect on Seismic Performance of Reinforced Concrete Squat Shear Walls with Rectangular Cross-Section

2013 ◽  
Vol 663 ◽  
pp. 159-163
Author(s):  
Hae Jun Yang ◽  
Hyun Do Yun
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Solid Wall ◽  
Rectangular Cross Section ◽  
Shear Walls ◽  
Shear Wall ◽  
Hysteretic Behavior ◽  
Wall Panel ◽  
Squat Shear Wall ◽  
Reversed Cyclic

In this study, two reinforced concrete (RC) squat shear walls with height-to-length ratio of 0.55 and non-ductile reinforcement details are tested under reversed cyclic loading. Emphasis of the study is placed on the hysteretic behavior and cracking procedure of RC squat shear walls in accordance with the presence and absence of vertical seam on the wall panel. Two specimens had the same rectangular cross-section of 1,100 x 50mm, with wall panel heights of 600mm. To investigate the effect of vertical seams on the wall panel on the structural behavior of shear wall, one wall (CON-S) with three vertical seams with dimension of 260 x 40mm was made and the other (CON-N) was a solid wall without seams. The test results indicated that a squat shear wall with vertical seams exhibited more stable hysteretic behavior than a solid shear wall. Vertical seams on the wall panel improve the ductility and energy dissipation capacity but decrease the maximum strength of RC non-ductile squat shear wall.

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