Seismic behavior and shear strength of tubed RC short columns

2010 ◽  
Vol 66 (3) ◽  
pp. 385-397 ◽  
Author(s):  
Xuhong Zhou ◽  
Jiepeng Liu
Keyword(s):  
Shear Strength ◽  
Seismic Behavior ◽  
Short Columns

scholarly journals Seismic Performance of High-Ductile Fiber-Reinforced Concrete Short Columns

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Mingke Deng ◽  
Yangxi Zhang
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Seismic Performance ◽  
Seismic Behavior ◽  
Fiber Reinforced Concrete ◽  
Test Results ◽  
Fiber Reinforced ◽  
Short Column ◽  
Short Columns

This study mainly aims to investigate the effectiveness of high-ductile fiber-reinforced concrete (HDC) as a means to enhance the seismic performance of short columns. Six HDC short columns and one reinforced concrete (RC) short column were designed and tested under lateral cyclic loading. The influence of the material type (concrete or HDC), axial load, stirrup ratio, and shear span ratio on crack patterns, hysteresis behavior, shear strength, deformation capacity, energy dissipation, and stiffness degradation was presented and discussed, respectively. The test results show that the RC short column failed in brittle shear with poor energy dissipation, while using HDC to replace concrete can effectively improve the seismic behavior of the short columns. Compared with the RC short column, the shear strength of HDC specimens was improved by 12.6–30.2%, and the drift ratio and the energy dissipation increases were 56.9–88.5% and 237.7–336.7%, respectively, at the ultimate displacement. Additionally, the prediction model of the shear strength for RC columns based on GB50010-2010 (Chinese code) can be safely adopted to evaluate the shear strength of HDC short columns.

Shear strength model for steel reinforced concrete composite members: Short columns and deep beams

2020 ◽  
Vol 216 ◽  
pp. 110748
Author(s):  
Yicong Xue ◽  
Yong Yang ◽  
Yunlong Yu
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Strength Model ◽  
Deep Beams ◽  
Steel Reinforced Concrete ◽  
Short Columns

Cyclic loading tests and shear strength of steel reinforced recycled concrete short columns

2015 ◽  
Vol 92 ◽  
pp. 55-68 ◽  
Author(s):  
Hui Ma ◽  
Jianyang Xue ◽  
Yunhe Liu ◽  
Xicheng Zhang
Keyword(s):  
Shear Strength ◽  
Cyclic Loading ◽  
Recycled Concrete ◽  
Short Columns ◽  
Loading Tests ◽  
Cyclic Loading Tests

Experimental Study on Mechanical Property of Steel Reinforced Concrete Short Columns of T-Shaped

2007 ◽  
Vol 340-341 ◽  
pp. 1121-1126
Author(s):  
Zhe Li ◽  
Xiao Feng Zhang ◽  
Yan Feng Zhao ◽  
De Fa Wang
Keyword(s):  
Shear Strength ◽  
Mechanical Performance ◽  
Pressure Ratio ◽  
Large Degree ◽  
Seismic Intensity ◽  
Axial Pressure ◽  
Displacement Ductility ◽  
Short Columns ◽  
Test Study ◽  
The Impact

The horizontal press performance of column is deteriorated because of special-shaped section. Moreover, because the antiseismic performance of columns is worse, it is only used in regions where seismic intensity is lower. So the main problem is to enhance the ductility. This test study on mechanical performance has been carried out through fourteen SRCTSSC and RCTSSC. The study focuses on the impact of test axial pressure ratio(nt), hooped reinforcement ratio(ρv), shear span ratio(λ) and steel ratio(ρss) to the shear strength and the antiseismic performance of SRCTSSC. It can be concluded that the shear strength of SRCTSSC is increasing with the increasing of nt and ρss , but the degree of increasing is small when nt is a certainty value, and that the shear strength of SRCTSSC is decreasing with increasing of λ; The shear resistance formula of T-shaped column is derived through tests, the calculated results are in correspondence with those of the tests. It also can be concluded that the hysteretic loops of the SRCTSSC are full and the hysteretic behaviors are improved and that the displacement ductility is increasing with increasing of ρv and ρss , but decreasing with the increasing of nt and the degree of variety in high axial pressure ratio is larger than in low axial pressure ratio. If steel bars are added, the shear strength and displacement ductility of SRCTSSC is increased in a large degree, and the capacity of energy dissipation is also enhanced. This test, for applying the special-shape column to higher intensity region, has the certain instructive significance.

Pseudo-Dynamic and Quasi-Static Testing of an Irregular Steel Concrete Composite Frame with Wing Walls

2016 ◽  
Vol 16 (02) ◽  
pp. 1450095 ◽  
Author(s):  
Yongtao Bai ◽  
Guoliang Bai
Keyword(s):  
Reinforced Concrete ◽  
Seismic Behavior ◽  
Power Plants ◽  
Shear Failure ◽  
Thermal Power ◽  
Moment Frame ◽  
Static Tests ◽  
Panel Zone ◽  
Short Columns ◽  
Wing Walls

This paper presents a series of pseudo-dynamic tests (PDTs) and quasi-static tests (QSTs) on a dual wing-walled frame system, represented here by a 1/7-scaled composite moment frame with steel reinforced concrete (SRC) columns and reinforced concrete (RC) wing walls. Special characteristics of this scaled system are irregular story layout, strong-beam weak-column mechanism and large axial load. A series of scaled El-Centro (NS) waves were used as the input ground motion for the PDTs, the results of which showed that the seismic behavior was significantly improved by the RC wing walls. With the strong-beam weak-column connections, severe damages sustained by the longitudinal wing walls (LWW) prevented the potential collapse of column, and the transverse wing wall (TWW) efficiently avoided the fragile shear failure of short columns and panel zone of beam-column joints. The failure mechanisms were identified indicating that wing walls improved the ductility for the bare frame. This study provides a solid experimental support on the evaluation of seismic behavior of irregular SRC frames with RC wing walls, which could be applied in the main factory buildings of thermal power plants (TPP).

Mechanical Properties and Applications of CFRP in Retrofitting and Repairing Reinforced Concrete Short Columns

2009 ◽  
Vol 79-82 ◽  
pp. 1599-1602 ◽  
Author(s):  
Wei Wang ◽  
Xin Jiang Cai ◽  
Shi Zhu Tian
Keyword(s):  
Mechanical Properties ◽  
Seismic Behavior ◽  
Large Scale ◽  
Shape Parameter ◽  
Seismic Analysis ◽  
Probability Model ◽  
Strength Parameter ◽  
Static Testing ◽  
Short Columns ◽  
Strain Relationship

The mechanical properties of CFRP without epoxy resin were tested by the monotonic load method, and the corresponding stress-strain relationship curve was established. The probability model and the parameter fitting based on Weibull distribution theory were applied, and the characteristic strength parameter and the shape parameter of CFRP were obtained. Three large scale RC short columns were constructed, the specimen not retrofitted, specimen strengthen retrofitted by CFRP and specimen repaired by CFRP which has been damaged by earthquake were simulated respectively. Quasi-static testing was carried out. The hysteretic-loop curve and average framework curve were obtained, furthermore, the performance of ductility and strength were analyzed and compared. The calculational results approximately agree with the experimental results, which prove the validity of OpenSees. The short columns retrofitted by CFRP have superior ductility so as to enhance the seismic performances effectively. The residual seismic behavior of short columns can also meet the requirement of seismic code. The research provides reference to seismic analysis and engineering design of retrofitted reinforcement concrete structures.

The importance of panel zone shear strength on seismic behavior of improved slotted-web beam connections

2017 ◽  
Vol 17 (1) ◽  
pp. 307-318 ◽  
Author(s):  
Mohammad Reza Adlparvar ◽  
Mohammad Ghasem Vetr ◽  
Farshad Ghaffari
Keyword(s):  
Shear Strength ◽  
Seismic Behavior ◽  
Panel Zone
Sign in / Sign up

Export Citation Format

Share Document