Experimental Research on Strengthened by Gluing Steels Seismic Behaviour for Earthquake Damaged Railway Bridge with Gravity Piers

2013 ◽  
Vol 838-841 ◽  
pp. 1145-1148
Author(s):  
Ming Bo Ding ◽  
Xing Chong Chen
Keyword(s):  
Energy Dissipation ◽  
Experimental Research ◽  
Steel Plate ◽  
Horizontal Load ◽  
Railway Bridge ◽  
Seismic Behaviour ◽  
Static Test ◽  
Railway Bridges ◽  
Energy Dissipation Capacity ◽  
Comparison And Analysis

In order to study the seismic performance of steel plate reinforcement on gravity piers in railway bridges, a quasi-static test was conducted on the 0.2% steel ratio pier model. Shearing damage on the pier model occurred on the action of horizontal load. Steel-bonded reinforcement was conducted on the damaged model, and comparison and analysis were made based on the failure mode, bearing capacity, ductility, energy dissipation capacity and stiffness degradation.

scholarly journals Experimental/Numerical Evaluation of Steel Trapezoidal Corrugated Infill Panels with an Opening

2021 ◽  
Vol 11 (7) ◽  
pp. 3275
Author(s):  
Majid Yaseri Gilvaee ◽  
Massood Mofid
Keyword(s):  
Energy Dissipation ◽  
Ultimate Strength ◽  
Steel Plate ◽  
Shear Walls ◽  
Experimental Results ◽  
Structural Performance ◽  
Initial Stiffness ◽  
Infill Panels ◽  
Energy Dissipation Capacity ◽  
Ductility Ratio

This paper investigates the influence of an opening in the infill steel plate on the behavior of steel trapezoidal corrugated infill panels. Two specimens of steel trapezoidal corrugated shear walls were constructed and tested under cyclic loading. One specimen had a single rectangular opening, while the other one had two rectangular openings. In addition, the percentage of opening in both specimens was 18%. The initial stiffness, ultimate strength, ductility ratio and energy dissipation capacity of the two tested specimens are compared to a specimen without opening. The experimental results indicate that the existence of an opening has the greatest effect on the initial stiffness of the corrugated steel infill panels. In addition, the experimental results reveal that the structural performance of the specimen with two openings is improved in some areas compared to the specimen with one opening. To that end, the energy dissipation capacity of the specimen with two openings is obtained larger than the specimen with one opening. Furthermore, a number of numerical analyses were performed. The numerical results show that with increasing the thickness of the infill plate or using stiffeners around the opening, the ultimate strength of a corrugated steel infill panel with an opening can be equal to or even more than the ultimate strength of that panel without an opening.

Research on the Joint of Concrete-Filled Steel Tubular Column and Steel Beam

2013 ◽  
Vol 351-352 ◽  
pp. 174-178
Author(s):  
Ying Zi Yin ◽  
Yan Zhang
Keyword(s):  
Energy Dissipation ◽  
Failure Mechanism ◽  
Compression Ratio ◽  
Seismic Behavior ◽  
Strength Degradation ◽  
Steel Beam ◽  
Failure Characteristics ◽  
Static Test ◽  
Axial Compression Ratio ◽  
Energy Dissipation Capacity

With the pseudo-static test of 4 concrete-filled square steel tubular column and steel beam joint with outer stiffened ring, this paper discusses the failure characteristics, failure mechanism and seismic behavior of joints under different axial compression ratio. The analysis of the testing results shows: when reached the ultimate strength, the strength degradation and stiffness degradation of joints are slowly and the ductility is also good, the energy dissipation capacity of joints is much better.

Test Study on the Rigidity Degradation and Energy Dissipation of High-Strength Reinforced Concrete Columns with Central Reinforcement

2010 ◽  
Vol 163-167 ◽  
pp. 398-405
Author(s):  
San Sheng Dong ◽  
Zi Xue Lei ◽  
Jun Hai Zhao
Keyword(s):  
Energy Dissipation ◽  
High Strength ◽  
Concrete Columns ◽  
High Energy ◽  
Affecting Factors ◽  
Static Test ◽  
Test Study ◽  
Core Areas ◽  
Energy Dissipation Capacity ◽  
High Energy Dissipation

Based on the pseudo-static test of 6 high-strength RC columns with central reinforcement skeletons, this paper studied their hysterisis performance, degradation of strength and rigidity, and energy dissipation capacity, with the affecting factors analyzed. The result shows that the central reinforcement skeletons can compensate for the low plasticity and brittle failure susceptibility of high-strength concrete so that all the specimens have stable strength, slow rigidity degradation and high energy dissipation capacity at later stage of loading; the larger the core areas the higher the strengths and ductility of the specimens, but slightly faster the degradation of strength and energy dissipation capacity as compared with the specimens with smaller core areas; the spacing of ties, longitudinal reinforcement ratio of core area both influence the strength degradation and energy dissipation capacity of the specimens, but they have little effect on their strengths.

scholarly journals Experimental Evaluation of Hysteretic Behavior of Rhombic Steel Plate Dampers

2014 ◽  
Vol 6 ◽  
pp. 185629 ◽  
Author(s):  
Qiang Han ◽  
Junfeng Jia ◽  
Zigang Xu ◽  
Yulei Bai ◽  
Nianhua Song
Keyword(s):  
Energy Dissipation ◽  
Yield Strength ◽  
Mild Steel ◽  
Steel Plate ◽  
Mechanical Performance ◽  
Hysteretic Behavior ◽  
Loading Test ◽  
Hysteretic Energy ◽  
Steel Material ◽  
Energy Dissipation Capacity

Rhombic mild-steel plate damper (also named rhombic added damping and Stiffness (RADAS)) is a newly proposed and developed bending energy dissipation damper in recent years, and its mechanical properties, seismic behavior, and engineering application still need further investigations. In order to determine the basic mechanical performance of RADAS, fundamental material properties tests of three types of mild-steel specimen including domestically developed mild-steel material with low yield strength were carried out. Then, a quasistatic loading test was performed to evaluate the mechanical performance and hysteretic energy dissipation capacity of these rhombic mild-steel dampers manufactured by aforementioned three types of steel materials. Test results show that yield strength of domestically developed low yield strength steel (LYS) is remarkably lower than that of regular mild steel and its ultimate strain is also 1/3 larger than that of regular mild steel, indicating that the low yield strength steel has a favorable plastic deformation capability. The rhombic mild-steel plate damper with low yield strength steel material possesses smaller yield force and superior hysteretic energy dissipation capacity; thus they can be used to reduce engineering structural vibration and damage during strong earthquakes.

Research on the Seismic Behavior of Concrete-Filled Steel Tubular Column and Steel Beam Joint

2012 ◽  
Vol 204-208 ◽  
pp. 2528-2532
Author(s):  
Ying Zi Yin ◽  
Yan Zhang
Keyword(s):  
Energy Dissipation ◽  
Compression Ratio ◽  
Seismic Behavior ◽  
Steel Beam ◽  
Failure Characteristics ◽  
Static Test ◽  
Axial Compression Ratio ◽  
Earthquake Action ◽  
Energy Dissipation Capacity ◽  
Strength And Stiffness

Joints are the forces cross points of members, and the bearing modes are more complex than other members, especially under earthquake action, so the rationality of joints are directly related to the safe reliability of structure. By the pseudo-static test of 4 concrete-filled square steel tubular column and steel beam joint with outer stiffened ring, this paper discusses the failure characteristics, failure mechanism and seismic behavior of joints under different axial compression ratio. The analysis of the testing results shows: the energy dissipation capacity of joints is much better, the degradation of strength and stiffness are slowly when reached the ultimate strength, and the ductility is also good.

Seismic Behavior Test of Recycled RC Frame Column with Different Axial Compression Ratios

2012 ◽  
Vol 517 ◽  
pp. 564-569
Author(s):  
Jin Song Fan ◽  
An Zhou ◽  
Li Hua Chen ◽  
Bing Kang Liu
Keyword(s):  
Energy Dissipation ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Failure Modes ◽  
Construction Materials ◽  
Recycled Concrete ◽  
Hysteretic Behavior ◽  
Static Test ◽  
Concrete Frame ◽  
Energy Dissipation Capacity

Recycled concrete is a kind of new construction materials, and now received more and more attention from researchers and engineers, since its application in engineering projects can well cater to the increasing requirements of development for economic and environment-friendly society. Based on the pseudo static test of five recycled reinforcement concrete frame columns with different experimental axial compression ratios from 0.3 to 0.65, their failure modes, failure mechanism, hysteretic behavior, skeleton curves, bearing capacity, rigidity, ductility and energy dissipation capacity were discussed. Some possible influence factors and disciplines were also selected and analyzed. The study indicates that recycled reinforcement concrete frame columns in the case of relative low axial compression ratios usually exhibited similar and steady mechanical properties with common concrete columns. With the increase of axial compression ratio, its ductility and energy dissipation capacity are decreased and destruction forms tended to obvious brittle fracture, though its bearing capacity could slightly rise. The test results and analysis also manifest recycled concrete had expectative application potentials in most case.

scholarly journals Experimental static and seismic behaviour of glulam beam-to-column connection with screwed-in threaded rod joints

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 5272-5286
Author(s):  
Huifeng Yang ◽  
Chaochao Wang ◽  
Junbin Hu ◽  
Haotian Tao ◽  
Jiwei Liu ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Failure Modes ◽  
Load Carrying Capacity ◽  
Seismic Behaviour ◽  
Glulam Beam ◽  
Steel Columns ◽  
Load Carrying ◽  
Rotation Stiffness ◽  
Energy Dissipation Capacity ◽  
Reversed Cyclic

To evaluate the static and seismic behaviour of glulam beam-to-column connections with screwed-in threaded rods, nine specimens grouped in three were tested under both monotonic and reversed cyclic loads. The failure modes, moment resistance, initial rotation stiffness, ductility, and energy dissipation capacity of the developed connections were investigated. The results indicated that the developed beam-to-column connections showed superior structural performance. Furthermore, with the introduction of a steel bracket, the hybrid screwed-in threaded rod connection features larger stiffness, higher load-carrying capacity, remarkable ductility, and better energy dissipation capacity. The main failure modes included the yielding of steel brackets, as well as the yielding or rupture of the threaded rods, which indicated a ductile behaviour. The connection specimens with steel columns showed larger stiffness than those with glulam columns, which is reasonable for the bigger compressive deformation of glulam columns.

scholarly journals Effect of column foot tenon on behavior of larch column base joints based on concrete plinth

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 6648-6667
Author(s):  
Xiaoli Han ◽  
Jian Dai ◽  
Wei Qian ◽  
Baolong Li ◽  
Yuanjun Jin ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Hysteretic Behavior ◽  
Timber Structures ◽  
Test Results ◽  
Rotational Angle ◽  
Static Test ◽  
Energy Dissipation Capacity ◽  
The Moment ◽  
Reversed Cyclic ◽  
Column Base

The wooden columns in timber structures of ancient buildings have column foot tenons of various sizes. The main reason for these differences is their use for different roof loads. Six full-scale specimens with different sizes of column foot tenon were designed and manufactured. The tree species used for the specimens was larch. The quasi-static test was conducted on the specimens that were used in timber structures of ancient buildings. The effects of column foot tenon size on the mechanical properties of larch wooden columns were studied. The moment-rotational angle hysteretic curves, moment-rotational angle skeleton curves, ductility, stiffness degradation, energy dissipation capacity, slippages between the wooden column and the plinth, and the damage of the column foot tenons were examined. The test results showed that the column foot tenon played an important role in the mechanical behavior of the wooden column under low-cycle reversed cyclic loading. The rotation of the column foot tenon improved the energy dissipation capacity of the wooden column. As the rotational angle of the column base increased, the column foot tenon had different degrees of damage. Different sizes of column foot tenon had their own advantages and hysteretic behavior.

scholarly journals Seismic Behaviour of TRC-Strengthened RC Columns under Different Constraint Conditions

2019 ◽  
Vol 26 (1) ◽  
pp. 360-378 ◽  
Author(s):  
Liu Ming ◽  
Yin Shiping ◽  
Chen Wenjie
Keyword(s):  
Energy Dissipation ◽  
Peak Load ◽  
Seismic Behaviour ◽  
Rc Columns ◽  
Displacement Ductility ◽  
Good Consistency ◽  
Energy Dissipation Capacity ◽  
Load Peak ◽  
Ductility Ratio ◽  
Better Than

AbstractThis paper studied the confinement effect of textile layers and the stirrup ratio on the seismic behaviour of TRC-strengthened RC columns using the numerical method. The results showed that the numerical values have good consistency with the experimental. Within the range of 1 to 3 layers of textile, with the increase of the number of textile layers, the peak load, displacement ductility ratio and energy dissipation capacity of the columns increased; however, these parameters only exhibited a limited increase when the textile layers continued to increase. In addition, the textile layers had a slight influence on the rate of the energy dissipation capacity. With the increase of the stirrup ratio, the yield load, peak load and ultimate load of the column did not change significantly, but the ductility coefficient and energy dissipation capacity of the column increased. Furthermore, for a TRC-strengthened column with three layers of textile and a stirrup ratio of 0.34%, the hysteresis loop fullness and the bearing capacity are better than those of a column with two layers of textile and a stirrup ratio of 0.67%. Therefore, it can be seen that TRC could play an efficient constraint role on the column when the stirrup arrangement is less.

Experimental Research on Hysteretic Behavior of L-Shaped Columns with HRB500 Reinforcement

2013 ◽  
Vol 275-277 ◽  
pp. 947-950
Author(s):  
Kun Liu ◽  
Jing Xian Tian ◽  
Yan Yan Li
Keyword(s):  
Energy Dissipation ◽  
Cyclic Loading ◽  
Experimental Research ◽  
Ultimate Load ◽  
Hysteretic Behavior ◽  
Energy Dissipation Capacity ◽  
Low Cyclic Loading ◽  
Damage Characteristic

Three L-shaped columns with HRB500 reinforcement were tested under low cyclic loading. The effect of stirrup ratios on damage characteristic, hysteretic characteristic, rigidity degradation and energy dissipation capacity was analyzed to research the hysteretic behavior of L-shaped columns with HRB500 reinforcement. The result shows that the damage characteristic and the hysteretic characteristic of L-shaped columns with HRB500 reinforcement are improved with the increase of stirrup ratios. The energy dissipation capacity of L-shaped column was also enhanced after ultimate load with the increase of stirrup ratios.

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