Mechanical performance of precast RC columns with grouted sleeve connections

The seismic performance of reinforced concrete(RC) columns is one of the controlling factors of the shock resistance for RC frame structures and bridges under seismic loads. Due to the complicated material behavior and complex external force during the earthquake, an accurate simulation of the mechanical performance under seismic loads demands more precisions for the hysteresis constitutive laws of materials. In this paper, based on the fiber cross-section model, adopting revised Kent-Park model for concrete and Legeron model for steel reinforcement, programming the UMAT material subroutine, FEM software ABAQUS is used to simulate a RC column mentioned in a research. It’s results are found agreed well with the test results.

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Nonlinear Numerical Analysis of SRC-RC Transfer Columns

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.193-194.1129 ◽

2012 ◽

Vol 193-194 ◽

pp. 1129-1133

Author(s):

Hui Lin ◽

Yun Zou ◽

Yi Xuan Chen ◽

Zhi Wei Wan

Keyword(s):

Finite Element ◽

Axial Compression ◽

Compression Ratio ◽

Mechanical Performance ◽

Element Analysis ◽

Rc Columns ◽

Steel Ratio ◽

Finite Element Software ◽

Axial Compression Ratio ◽

Hysteretic Performance

SRC-RC transfer columns are commonly designed as a transition floor for high-rising buildings to transfer from lower SRC columns to upper RC columns. The mechanical performances are studied in the paper using the finite element software of ABAQUS. Nonlinear numerical analyses are made for SRC-RC transfer columns firstly to obtain the relationship between force and displacement at top of the columns. By comparing the analytical results with experimental ones, it is found that the results from finite element analysis coincide well with experimental ones. So ABAQUS software could be used as a supplementary means to simulate SRC-RC transfer columns mechanical behavior. Then the factors such as steel ratio and axial compression ratio are contrastively analyzed. The results show that axial compression ratio has a greater influence on the bearing capacity and hysteretic performance of the structure, but the steel ratio has less influence. Finally, comparisons between SRC-RC and RC columns are also made to demonstrate the mechanical performance of SRC-RC columns further. Conclusions drawn in the study might be useful in practical engineering design.

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271 Cardiac re-synchronization may have a beneficial effect on right ventricular mechanical performance

EP Europace ◽

10.1016/s1099-5129(05)80191-6 ◽

2005 ◽

Vol 7 ◽

pp. 65-65

Keyword(s):

Beneficial Effect ◽

Right Ventricular ◽

Mechanical Performance

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The Mechanical Performance of Carbon Fibres- Addressing the Role of Microstructure

10.33599/nasampe/s.19.1459 ◽

2019 ◽

Author(s):

Peter Peter ◽

Claudia Creighton ◽

David Fox ◽

Pablo Mota Santiago ◽

Adrian Hawley ◽

...

Keyword(s):

Mechanical Performance ◽

Carbon Fibres

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Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.17.3.2020.08.0612 ◽

2020 ◽

Vol 17 (3) ◽

pp. 8150-8159

Author(s):

Kulwant Singh ◽

Gurbhinder Singh ◽

Harmeet Singh

Keyword(s):

Heat Treatment ◽

Friction Stir Welding ◽

Magnesium Alloys ◽

Mechanical Performance ◽

Fuel Efficiency ◽

Research Work ◽

Grain Structure ◽

Tensile Fracture ◽

Friction Stir ◽

The Impact

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.

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