Numerical Simulation Analysis of Mechanical Properties of Square Steel Tubular High-Strength Concrete Inner Set CFRP Round Pipe Flexural Members under Reciprocating Loads

2014 ◽  
Vol 578-579 ◽  
pp. 509-516
Author(s):  
De Bin Ren ◽  
Shuang Li ◽  
Si Meng Chang ◽  
Wei Pei
Keyword(s):  
Mechanical Properties ◽  
High Strength Concrete ◽  
Seismic Behavior ◽  
Simulation Analysis ◽  
Concrete Strength ◽  
Great Influence ◽  
High Strength ◽  
Absorption Capacity ◽  
Strength Concrete ◽  
Strength Grade

Using Finite Element Method simulating respectively Square Steel Tubular High-strength concrete inner set CFRP round pipe beam and Ordinary Square Steel Tubular High-strength concrete beam. Comparative analysis of the effect of the Mechanical Properties of inner set CFRP round pipe to components ; Studying on the effect of Mechanical Properties of Square Steel Tubular High-strength concrete inner set CFRP round pipe under with different arrangement ratio of CFRP and strength grade of concrete. Based on calculation we can see under cyclic loading Square Steel Tubular High-strength concrete inner set CFRP round pipe beams have quite different failure characteristics with Ordinary beams, the curve of moment-curvature is plump, having good energy absorption capacity and seismic behavior;The arrangement ratio of CFRP and the strength grade of concrete have great influence to the seismic behavior; of Square Steel Tubular High-strength concrete inner set CFRP round pipe beams, with the increasing of the layer number of CFRP round pipe, the improving of concrete strength grade, seismic behavior;of the beams is significant strengthened. Showing that inner set CFRP round pipe can significantly increase seismic behavior of Square Steel Tubular High-strength concrete beams.

Seismic behavior of normal-strength concrete-filled precast high-strength concrete centrifugal tube columns

2019 ◽  
Vol 23 (4) ◽  
pp. 614-629
Author(s):  
Shaohua Zhang ◽  
Xizhi Zhang ◽  
Shengbo Xu ◽  
Xingqian Li
Keyword(s):  
Axial Compression ◽  
High Strength Concrete ◽  
Seismic Behavior ◽  
Failure Modes ◽  
Concrete Strength ◽  
High Strength ◽  
Test Results ◽  
Normal Strength Concrete ◽  
Strength Concrete ◽  
Normal Strength

This study reports the cyclic loading test results of normal-strength concrete-filled precast high-strength concrete centrifugal tube columns. Seven half-scale column specimens were tested under cyclic loads and axial compression loads to investigate their seismic behavior. The major parameters considered in the test included axial compression ratio, filled concrete strength, and volumetric stirrup ratio. The structural behavior of each specimen was investigated in terms of failure modes, hysteresis behavior, bearing capacity, dissipated energy, ductility, stiffness degradation, drift capacity, and strain profiles. Test results revealed that the concrete-filled precast high-strength concrete centrifugal tube column exhibited good integral behavior, and the failure modes of all columns were ductile flexural failures. Lower axial compression ratio and higher volumetric stirrup ratio resulted in more satisfactory ductile performance. In contrast, the filled concrete strength has a limited influence on the structural behavior of concrete-filled precast high-strength concrete centrifugal tube columns. Based on the limit analysis method, the calculation formula for the bending capacity of the concrete-filled precast high-strength concrete centrifugal tube column was developed, and the results predicted from the formulas were in good agreement with the experiment results.

Nonlinear Numerical Simulation Analysis on Mechanical Behavior of High-Strength Concrete Beams Reinforced by HRBF500 Steel

2012 ◽  
Vol 166-169 ◽  
pp. 1607-1613
Author(s):  
Li Juan Liu ◽  
Xian Guo Ye ◽  
Xun Chong ◽  
Qing Jiang ◽  
Lin Lin Xie
Keyword(s):  
Mechanical Behavior ◽  
High Strength Concrete ◽  
Simulation Analysis ◽  
Concrete Strength ◽  
High Strength ◽  
Constitutive Relationship ◽  
Strength Concrete ◽  
Concrete Members ◽  
Nonlinear Numerical Simulation ◽  
Relationship Of

Mechanical Behavior of 3 high-strength concrete simply supported beams reinforced by HRBF500 steel with different stirrup ratio are simulated by software OpenSees .In order to establish the constitutive relationship of high-strength concrete more accurately, some parameters of modified Kent-Park were adjusted partly. Furthermore, the restraining effect of different stirrup ratio to the core concrete is considered by the concrete strength rasied coefficient k. The analysis results matched the test ones well, indicating that the OpenSees program is effective to simulate the mechanical behavior of high-strength concrete members reinforced by high-strength steel.

scholarly journals Experimental Study on the Mechanical Properties of Perfobond Rib Shear Connectors with Steel Fiber High Strength Concrete

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3345
Author(s):  
Fangwen Wu ◽  
Shuo Liu ◽  
Chengfeng Xue ◽  
Kangkang Yang ◽  
Yanpeng Feng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Strength Concrete ◽  
Steel Fiber ◽  
Concrete Strength ◽  
High Strength ◽  
Shear Capacity ◽  
Steel Plates ◽  
Enhancement Effect ◽  
Strength Concrete ◽  
Shear Connectors

Perfobond rib (PBL) shear connectors, made up of the perforated steel plates with the penetrating rebars passing through the holes, are extensively adopted in steel-concrete composite structures for their excellent performance. The adequate understanding of mechanical properties for PBL connectors is of great significance for their reasonable design. In this study, a push out experiment, including 12 specimens with the parameters of concrete strength, diameter of penetrating rebars and the number of holes on perforated steel plate, was performed to explore the mechanical behavior of PBL connectors with steel fiber high strength concrete (SFHSC). The experimental results showed that the shear capacity of the PBL connectors increased with the increase in concrete strength, diameter of the penetrating rebars and the number of holes. Furthermore, a general prediction formula for the shear capacity of PBL connectors was developed, which considers the shear contribution of concrete dowels, concrete end-bearing, interfacial bonding between the perforated steel plates and concrete and the penetrating rebars as well as the enhancement effect of steel fibers. The prediction results of the equation are in good agreement with the experimental data and could provide a reference for the design of PBL connectors.

scholarly journals MECHANICAL PROPERTIES OF HIGH STRENGTH CONCRETE AT HIGH TEMPERATURES

2008 ◽  
Vol 73 (624) ◽  
pp. 341-347 ◽  
Author(s):  
Masashi MATSUDO ◽  
Hirokazu NISHIDA ◽  
Takahiro OHTSUKA ◽  
Takeo HIRASHIMA ◽  
Takeo ABE
Keyword(s):  
Mechanical Properties ◽  
High Temperatures ◽  
High Strength Concrete ◽  
High Strength ◽  
Strength Concrete

scholarly journals Experimental Study on the Torsional Behaviour of Prestressed HSC Hollow Beams

2020 ◽  
Vol 10 (2) ◽  
pp. 642 ◽  
Author(s):  
Luís Bernardo ◽  
Sérgio Lopes ◽  
Mafalda Teixeira
Keyword(s):  
Experimental Study ◽  
High Strength Concrete ◽  
Concrete Beams ◽  
Concrete Strength ◽  
High Strength ◽  
Experimental Program ◽  
Pure Torsion ◽  
Strength Concrete ◽  
Hollow Beams

This article describes an experimental program developed to study the influence of longitudinal prestress on the behaviour of high-strength concrete hollow beams under pure torsion. The pre-cracking, the post-cracking and the ultimate behaviour are analysed. Three tests were carried out on large hollow high-strength concrete beams with similar concrete strength. The variable studied was the level of longitudinal uniform prestress. Some important conclusions on different aspects of the beams’ behaviour are presented. These conclusions, considered important for the design of box bridges, include the influence of the level of prestress in the cracking and ultimate behaviour.

Comparison Analysis on the Mechanical Properties of HSC and NSC after the Action of High Temperatures

2014 ◽  
Vol 1014 ◽  
pp. 49-52
Author(s):  
Xiao Ping Su
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
High Temperatures ◽  
High Strength Concrete ◽  
Elasticity Modulus ◽  
Strain Curve ◽  
Peak Stress ◽  
High Strength ◽  
Peak Strain ◽  
Strength Concrete

With the wide application of high strength concrete in the building construction,the risk making concrete subject to high temperatures during a fire is increasing. Comparison tests on the mechanical properties of high strength concrete (HSC) and normal strength concrete (NSC) after the action of high temperature were made in this article, which were compared from the following aspects: the peak stress, the peak strain, elasticity modulus, and stress-strain curve after high temperature. Results show that the laws of the mechanical properties of HSC and NSC changing with the temperature are the same. With the increase of heating temperature, the peak stress and elasticity modulus decreases, while the peak strain grows rapidly. HSC shows greater brittleness and worse fire-resistant performance than NSC, and destroys suddenly. The research and evaluation on the fire-resistant performance of HSC should be strengthened during the structural design and construction on the HSC buildings.

Bond behavior of high strength concrete under reversed pull-out cyclic loading

2002 ◽  
Vol 29 (2) ◽  
pp. 191-200 ◽  
Author(s):  
M Alavi-Fard ◽  
H Marzouk
Keyword(s):  
Cyclic Loading ◽  
Bond Strength ◽  
High Strength Concrete ◽  
Concrete Strength ◽  
High Strength ◽  
Displacement Curve ◽  
Bond Slip ◽  
Strength Concrete ◽  
Pull Out ◽  
Normal Strength

Structures located in seismic zones require significant ductility. It is necessary to examine the bond slip characteristics of high strength concrete under cyclic loading. The cyclic bond of high strength concrete is investigated under different parameters, including load history, confining reinforcement, bar diameter, concrete strength, and the rate of pull out. The bond strength, cracking, and deformation are highly dependent on the bond slip behavior between the rebar and the concrete under cyclic loading. The results of cyclic testing indicate that an increase in cyclic displacement will lead to more severe bond damage. The slope of the bond stress – displacement curve can describe the influence of the rate of loading on the bond strength in a cyclic test. Specimens with steel confinement sustained a greater number of cycles than the specimens without steel confinement. It has been found that the maximum bond strength increases with an increase in concrete strength. Cyclic loading does not affect the bond strength of high strength concrete as long as the cyclic slip is less than the maximum slip for monotonic loading. The behavior of high strength concrete under a cyclic load is slightly different from that of normal strength concrete.Key words: bond, high strength, cyclic loading, bar spacing, loading rate, failure mechanism.

scholarly journals Effect of Locally Available Wheat Straw Ash in Developing High Strength Concrete

2021 ◽  
pp. 19-28
Author(s):  
Muhammad Armaghan Siffat ◽  
Muhammad Ishfaq ◽  
Afaq Ahmad ◽  
Khalil Ur Rehman ◽  
Fawad Ahmad
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Wheat Straw ◽  
High Strength Concrete ◽  
High Strength ◽  
Optimum Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Strength Concrete ◽  
Straw Ash

This study is supervised to assess the characteristics of the locally available wheat straw ash (WSA) to consume as a substitute to the cement and support in enhancing the mechanical properties of concrete. Initially, after incineration at optimum temperature of 800°C for 0.5, the ash of wheat straw was made up to the desirable level of fineness by passing through it to the several grinding cycles. Subsequently, the X-ray fluorescence (XRF) along with X-ray diffraction (XRD) testing conducted on ash of wheat straw for the evaluation its pozzolanic potential. Finally, the specimens of concrete were made by consuming 10% and 20% percentages of wheat straw ash as a replacement in concrete to conclude its impact on the compressive strength of high strength concrete. The cylinders of steel of dimensions 10cm diameter x 20cm depth were acquired to evaluate the compressive strength of high strength concrete. The relative outcomes of cylinders made of wheat straw ash substitution presented the slight increase in strength values of the concrete. Ultimately, the C-100 blends and WSA aided cement blends were inspected for the rheology of WSA through FTIR spectroscopy along with Thermogravimetric technique. The conclusions authenticate the WSA potential to replace cement in the manufacturing of the high strength concrete.

Sign in / Sign up

Export Citation Format

Share Document