Experiment on Seismic Behavior of Frame with Specially Shaped Columns Used Wide Flange in the First Floor and General on the above

2014 ◽  
Vol 578-579 ◽  
pp. 318-324
Author(s):  
Xue Hui Zhang ◽  
Shu Ling Ke
Keyword(s):  
Cyclic Loading ◽  
Bearing Capacity ◽  
Seismic Behavior ◽  
Low Frequency ◽  
Hysteresis Curve ◽  
Deformation Capacity ◽  
Rc Frame ◽  
Concrete Frame ◽  
Specially Shaped Column ◽  
Damage Characteristic

Studies show that the stiffness of the first floor column about concrete frame with general specially shaped column is insufficient, the column bottom will be compression damaged easily, the author advice using wide flange specially shaped column in the first floor to enhance the stiffness, so this paper designed a 1/3 scale RC frame with specially shaped columns used wide flange in the first floor and general on the above, furthermore the height of the first floor was higher than other floors. Then low frequency cyclic loading was experimented to the concrete frame, the seismic behavior of this kind frame such as damage characteristic, failure mechanism, bearing capacity, deformation capacity, hysteresis curve and storey drift were researched. It was shown that the seismic behavior of this structure was generally good, the method that changed the first floor to wide flange specially shaped column for concrete frame with specially shaped columns could enhance the stiffness of the first floor clearly, meanwhile the seismic behavior of the frame were improved.

Experimental Research on Seismic Behavior of Interior Joints of Specially Shaped Columns Reinforced by Fiber

2011 ◽  
Vol 94-96 ◽  
pp. 551-555 ◽  
Author(s):  
Xian Rong ◽  
Jian Xin Zhang ◽  
Yan Yan Li
Keyword(s):  
Energy Dissipation ◽  
Bearing Capacity ◽  
Seismic Behavior ◽  
Steel Fiber ◽  
Polypropylene Fiber ◽  
The Core ◽  
Low Cyclic Loading ◽  
The Moment ◽  
Specially Shaped Column ◽  
Damage Characteristic

Based on the low cyclic loading experiments on three interior joints with specially shaped columns, in which one of them was reinforced by polypropylene fiber in the core zone of joint, another steel fiber, the other was not reinforced, the authors compare the results in terms of damage characteristic, bearing capacity, displacement and ductility, hysteretic curve of the moment-rotation, rigidity degradation and energy dissipation. It is shown that seismic behavior of specially shaped column interior joints reinforced by fiber is improved significantly. The interior joint of specially shaped column reinforced by polypropylene fiber has a better damage characteristic and energy dissipation while that by steel fiber shows a higher yield load and bearing capacity.

Effect of Axial Compression Ratio on Ductility and Bearing Capacity of Specially Shaped Columns with HRB500 Reinforcement

2012 ◽  
Vol 204-208 ◽  
pp. 1066-1069
Author(s):  
Yan Jun Li ◽  
Ping Liu
Keyword(s):  
Bearing Capacity ◽  
Axial Compression ◽  
Compression Ratio ◽  
Ultimate Load ◽  
Deformation Capacity ◽  
Displacement Ductility ◽  
Yield Load ◽  
Axial Compression Ratio ◽  
Low Cyclic Loading ◽  
Specially Shaped Column

Four specially shaped columns with HRB500 reinforcement were tested under low cyclic loading. The hysteretic curve, yield load, ultimate load, displacement ductility and rigidity degradation were compared in order to research the effect of axial compression ratio on ductility and bearing capacity of specially shaped column with HRB500 reinforcement. It is shown that the axial compression ratio has greater influence on ductility and bearing capacity. With the increase of axial compression ratio, the bearing capacity of HRB500 reinforcement concrete specially shaped column can be enhanced while the deformation capacity becomes worse. The hysteretic characteristic of specially shaped columns with HRB500 reinforcement is improved and the stiffness degeneration becomes slow with the decrease of axial compression ratio.

With Different Axial Compression, the Finite Element Analysis of Concrete Frame Column that Reinforced by Assemble Inclined Web Steel Truss

2014 ◽  
Vol 1079-1080 ◽  
pp. 177-182
Author(s):  
Shao Wu Zhang ◽  
Ying Chuan Chen ◽  
Geng Biao Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Simulation Analysis ◽  
Hysteresis Curve ◽  
Element Analysis ◽  
Concrete Frame ◽  
The Finite Element Analysis ◽  
Steel Truss

In order to study the performance of concrete frame columns that reinforcedby assembleinclined web steel truss, with the same reciprocatinghorizontal displacement and different axialcompression.It canbe calculate the mechanical behavior of concrete frame columns and reinforced columns by using the finite element analysis software ABAQUS. Simulation analysis shows that the bearing capacity ofreinforced columnshas greatly increased andpresented a full hysteresis curve. The result shows that the reinforcement method of assemble inclined web steel truss can greatly improve the bearing capacity and ductility of the concrete frame column, and the axial compression is larger, the better the reinforcement effect.

scholarly journals Experimental Analysis of Seismic Performance of Masonry Shear Wall Reinforced with PP-Band Mesh and Plastering Mortar under In-Plane Cyclic Loading

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Qiang Zhou ◽  
Lingyu Yang ◽  
Wenyang Zhao
Keyword(s):  
Energy Dissipation ◽  
Cyclic Loading ◽  
Bearing Capacity ◽  
Low Cost ◽  
Low Frequency ◽  
Masonry Wall ◽  
Ultimate Bearing Capacity ◽  
Masonry Walls ◽  
Seismic Capacity ◽  
Energy Dissipation Capacity

Masonry structures are widely used in developing countries due to their low cost and simple construction, especially in remote areas, where there are a large number of houses without seismic measures. These buildings are prone to collapse and cause a lot of casualties, even under the action of small earthquakes. For the reinforcement of this structure, a cheap, effective, and easy-to-construct reinforcement method is urgently needed. Therefore, this article studies the reinforcement method of polypropylene bands (PP-bands). We have carried out low-frequency cyclic loading tests for two PP-band reinforced masonry walls and two compared masonry walls. We mainly studied the influence of PP-band and different compressive strengths of plastering mortar on the masonry wall’s seismic capacity. The seismic indicators mainly studied in this article include ultimate bearing capacity, energy dissipation capacity, stiffness degradation, and hysteresis characteristics. The experimental results show that the PP-band can greatly enhance the seismic capacity of the masonry wall. The ultimate bearing capacity, energy dissipation capacity, and displacement ductility of the PP-band reinforced wall are increased by 38%–48%, 22%–47%, and 138%–226%.

scholarly journals Seismic and Power Generation Performance of U-Shaped Steel Connected PV-Shear Wall under Lateral Cyclic Loading

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Hongmei Zhang ◽  
Jinzhi Dong ◽  
Yuanfeng Duan ◽  
Xilin Lu ◽  
Jinqing Peng
Keyword(s):  
Power Generation ◽  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Seismic Behavior ◽  
Residential Buildings ◽  
Shear Wall ◽  
Deformation Capacity ◽  
High Rise ◽  
Pv Module ◽  
New Form

BIPV is now widely used in office and residential buildings, but its seismic performance still remained vague especially when the photovoltaic (PV) modules are installed on high-rise building facades. A new form of reinforced concrete shear wall integrated with photovoltaic module is proposed in this paper, aiming to apply PV module to the facades of high-rise buildings. In this new form, the PV module is integrated with the reinforced concrete wall by U-shaped steel connectors through embedded steel plates. The lateral cyclic loading test is executed to investigate the seismic behavior and the electric and thermal performance with different drift angles. The seismic behavior, including failure pattern, lateral force-top displacement relationship, and deformation capacity, was investigated. The power generation and temperature variation on the back of the PV module and both sides of the shear wall were also tested. Two main results are demonstrated through the experiment: (1) the U-shaped steel connectors provide enough deformation capacity for the compatibility of the PV module to the shear wall during the whole cyclic test; (2) the electricity generation capacity is effective and stable during this seismic simulation test.

Study on Recycled Aggregate Concrete Frame Joints with Method of Nonlinear Finite Element

2009 ◽  
Vol 417-418 ◽  
pp. 745-748
Author(s):  
Jian Zhuang Xiao ◽  
M.M. Tawana ◽  
Xiao Hui Zhu
Keyword(s):  
Finite Element ◽  
Seismic Behavior ◽  
Low Frequency ◽  
Nonlinear Finite Element ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Displacement Curve ◽  
Element Analysis ◽  
Aggregate Concrete ◽  
Concrete Frame

With the achievements made in the research of mechanical properties for recycled aggregate concrete, this paper adopts the method of nonlinear finite element to analyze the seismic behavior of frame joints. The frame joints are made of recycled aggregate concrete. It also takes into account the bond behavior between steel bars and recycled aggregate concrete in the core area of the joints, and the force-displacement curve of the joints is calculated. Nonlinear finite element analysis shows that the results of the calculations are in accordance with the test results. It is concluded in this paper that, built models with nonlinear finite element method can be applied in simulating exactly the same seismic behavior of frame joints under low frequency reversed lateral loading.

scholarly journals Seismic Performance of Steel Box Bridge Piers with Earthquake-Resilient Function

2020 ◽  
Vol 2020 ◽  
pp. 1-24
Author(s):  
Haifeng Li ◽  
Wenwei Luo ◽  
Jun Luo
Keyword(s):  
Energy Dissipation ◽  
Bearing Capacity ◽  
Seismic Performance ◽  
Seismic Behavior ◽  
Bridge Pier ◽  
Steel Bridge ◽  
Deformation Capacity ◽  
The Novel ◽  
Seismic Capacity ◽  
Energy Dissipated

A novel steel box bridge pier with replaceable energy dissipation wall plates at the base was proposed. After moderate earthquakes, the damaged energy dissipation wall plates and constraining steel plates on the two sides could be rapidly replaced, while the entire energy-dissipated column at the base can also be replaced after rare earthquakes. In this way, the seismic capacity of the new type of steel box bridge pier could be restored after earthquakes. For the purpose of discussing the seismic performance of this novel steel box-shaped bridge pier, the pseudostatic test and numerical simulation were performed. The results showed that the failure of the specimens in the pseudostatic tests occurred predominantly in the energy dissipation zone at the base. After replacing the damaged energy-dissipated column at the base, the seismic behavior of the proposed steel bridge pier can be recovered rapidly. Axial compression ratio is an important factor influencing the seismic behavior of the novel steel box bridge pier. The strength of the energy dissipation wall plates influences the novel steel box-shaped bridge pier’s bearing capacity and deformation capacity. Spacing between the horizontal stiffening ribs had little impact on the bearing capacity and deformation capacity of the proposed steel bridge pier. The larger the thickness of the energy dissipation wall plate, the higher the bearing capacity and deformation capacity of the steel box bridge pier. Finally, an empirical equation for the design of this novel steel bridge pier under cyclic loading was proposed.

scholarly journals Study on Interaction of RC Pile-Soil with High Reinforcement Ratio of Integral Abutment Bridges under Quasi-Static Test

2022 ◽  
Vol 2148 (1) ◽  
pp. 012029
Author(s):  
Ying Luo ◽  
Fuyun Huang ◽  
Zhifu Chen ◽  
Xinghua Liu ◽  
Zhengfeng Liu ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Damping Ratio ◽  
Effective Interaction ◽  
Reinforcement Ratio ◽  
Hysteresis Curve ◽  
Deformation Capacity ◽  
Test Results ◽  
Integral Abutment ◽  
Equivalent Viscous Damping ◽  
Skeleton Curve

Abstract In order to improve the ability of the reinforcement concrete (RC) pile foundation of integral abutment to absorb the horizontal reciprocating deformation under the action of temperature or earthquake, a pseudo-static low cycle test on interaction of pile-soil with high reinforcement ratio was carried out. The failure location, hysteresis curve, skeleton curve and horizontal deformation of three piles with different reinforcement ratios were compared. The test results show that, with the increase of the reinforcement ratio, the crack of the RC pile develops along the pile body to the depth, and the pile body failure area and the position where the maximum bending moment moves down, the crack resistance of the pile body is improved, and the effective interaction pile length increases; The test results also show that the hysteresis curve of the model pile becomes fuller with the increase of the reinforcement ratio, compared with the RCP-1 specimen with the lowest reinforcement ratio, the equivalent viscous damping ratio of the RCP-3 specimen is increased by 31.6%, and the energy dissipation capacity is improved. In addition, with the increase of the reinforcement ratio, the bearing capacity and deformation capacity of model piles are greatly improved. Compared with RCP-1 specimen, the ultimate bearing capacity of RCP-3 specimen increased by 150%, and the corresponding ultimate displacement increased by 153%. Increasing reinforcement ratio can significantly improve the mechanical properties and deformation capacity of RC pile.

Mechanism of Frictional Mortar-Less Panel and its Application in Reinforcement Concrete Frame

2014 ◽  
Vol 894 ◽  
pp. 82-86
Author(s):  
Xiao Hong Zhou
Keyword(s):  
Finite Element ◽  
Seismic Behavior ◽  
Horizontal Displacement ◽  
Frame Structure ◽  
Rc Frame ◽  
Base Shear ◽  
Concrete Frame ◽  
Rc Frame Structure ◽  
Story Drift ◽  
Considerable Benefit

In order to improve the seismic behavior of the reinforcement concrete frame, a frictional mortar-less panel (FMP) was researched. In this masonry, the bricks are built without mortar and the lateral capability is supported by the friction between bricks. FMP has less rigid in-plane contribution, and contribute mostly to the energy dissipation of structure. To investigate the seismic behavior of FMP, a simple finite element modeling method has been proposed and verified with ANSYS. After that, the FMP was infilled in a typical reinforcement concrete frame structure and a Taft wave has been applied to research on its seismic behavior. The horizontal displacement, story drift, acceleration and base shear/axial force of RC frame has been achieved, results showed the FMP has considerable benefit to the seismic behavior of RC frame structure and worth to be promoted.

Seismic Behavior of Reinforced Concrete Frame Columns with Different Volumetric Percentage of Stirrups

2012 ◽  
Vol 166-169 ◽  
pp. 2046-2049 ◽  
Author(s):  
Shan Suo Zheng ◽  
Yue Heng Yan ◽  
Qing Lin Tao ◽  
Wen Yong Li
Keyword(s):  
Reinforced Concrete ◽  
Seismic Behavior ◽  
Low Frequency ◽  
Reinforced Concrete Frame ◽  
Reinforced Concrete Column ◽  
New Members ◽  
Skeleton Curve ◽  
Concrete Frame ◽  
The Relationship ◽  
Constant Axial Load

Based on the experiments of a reinforced concrete frame column, 5 new members with different volumetric percentage of stirrups which are applied with constant axial load and horizontal low-frequency cyclic load are analyzed with ABAQUS. This paper aims to study the relationship between volume-stirrup ratio and seismic behavior of reinforced concrete column. By analyzing skeleton curve and hysteretic curve of members, the results show that, if stirrups are reasonably arranged and the volume-stirrup ratio is larger enough, the good ductility, carrying capacity, energy dissipation capacity, and seismic behavior still be obtained with high axial compression ratio.

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