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effect of initial static load and dynamic load on concrete

effect of initial static load and dynamic load on concrete

Effect of Initial Static Load and Dynamic Load on Concrete ...

Dec 12, 2020  This paper deals with the investigation of the effect of initial static load and initial dynamic load on dynamic compressive failure of concrete materials based on numerical simulations. A meso-scale modeling method was established and a total of 147 three-dimensional concrete cubic models were simulated.

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Effect of Initial Static Load and Dynamic Load on Concrete ...

The static bending tests and the split Hopkinson pressure bar (SHPB) dynamic bending tests of concrete are investigated in this paper, and the effects of different initial static loading history ...

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Influence of initial static stress on the dynamic ...

Extensive research on the effect of initial static loading on concrete dynamic strength has been conducted (Yan and Lin 2008). The effect of initial static loading on dynamic compressive strength ...

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Rate effect of concrete strength under initial static loading

Uniaxial tensile experiments of 76 concrete specimens were conducted on the MTS810 electro-fluid servo-universal machine to investigate the effect of initial static load, the cyclic frequency and ...

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Effect of Initial Static Load on the Rate-Sensitive ...

Before concrete structures are subjected to dynamic loadings such as earthquake, usually they have already withstood static loads. Accordingly, the study on the strain-rate sensitivity of concrete should also be closely related to the initial static loads that concrete structures experience. But majority of the available documents concerning the dynamic properties of concrete do not take ...

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Effect of Prestatic Loading on Dynamic Tensile Strength of ...

Dec 12, 2016  The static bending tests and the split Hopkinson pressure bar (SHPB) dynamic bending tests of concrete are investigated in this paper, and the effects of different initial static loading history on the dynamic tensile strength of concrete are explored. The initial static loadings are divided into five grades, 0, 25, 50, 75, and 90% of static ...

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Effects of Static and Dynamic Loads on analysis and design ...

SAP2000 software is used to carry out static and dynamic analysis and SAFE software is used for design. It was found that the thicknesses of mat foundation from dynamic load models are less than those of the static loads case, especially for low number of story building and the thicknesses become almost equal as number of stories increase above 12.

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Rate effect of concrete strength under initial static loading

The dynamic strength of concrete tends to decrease with the increase in initial static stress; however, low initial static stress slightly affects the ultimate dynamic strength (Yan and Lin 2008).

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Static–Dynamic Combined Multiaxial Strength Criterion for ...

May 05, 2021  Effect of Initial Static Load and Dynamic Load on Concrete Dynamic Compressive Failure. Journal of Materials in Civil Engineering September 2020 . Effect of Uniaxial Strength and Fracture Parameters of Concrete on Its Biaxial Compressive Strength.

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Discussion of “Dynamic Bond Stress-Slip Relationship ...

Aug 04, 2016  The paper being discussed presents an interesting experimental study that focuses on the influence of initial static loading on the dynamic bond behavior between basalt fiber-reinforced polymer (BFRP) sheets and concrete. In particular, double-lap shear specimens were tested under different initial static loadings (0, 30, 50, 80, and 100%).

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(PDF) Comparison of Static and Dynamic Load Test of Pile

This paper discuss the results of three dynamic and static load test on cast-in-situ bored pile of length to diameter ratio 28, 25.5 and 23.47. The load-settlement response of dynamic and static ...

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Assessment of a concrete arch bridge using static and ...

Assessment of a concrete arch bridge using static and dynamic load tests89 under the test load. Then, the cubic smoothing spline is completely defined for the selected initial

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Strain-rate effects on concrete behavior

loading, on the other hand, viscoelastic deformations (creep) develop even at constant load and failure can occur at stress levels below the usual quasi-static strength [3]. To simulate correctly the dynamic and viscoelastic response of concrete structures with the inclusion of strain-rate effect, it is

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Effect of loading rate on mixed mode I-II crack ...

Apr 01, 2021  The mixed mode I-II crack propagation process in concrete is evaluated for loading rates of 0.012, 0.12, 1.2, 12 and 120 mm/min. The main parameters, such as the tensile strength, elastic modulus, Poisson’s ratio, mode I initial fracture toughness and fracture energy of concrete

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Dynamic Load Effects of Heavy Vehicles on Pavement ...

Feb 19, 2019  Dynamic loading is the constantly varying load of a vehicle due to internal and external factors while moving along a road. Consideration of the dynamic effect of heavy vehicles on pavement performance is a complex issue. This report presents the literature review conducted to investigate the many factors involved, including:

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What Is the Difference Between Static and Dynamic Loads?

Mar 31, 2020  Static Load vs. Dynamic Load The main difference between a static and dynamic load lies in the forces produced by the weight of an object. When static, the load remains constant and doesn't change over time. With a dynamic load, some outside factor causes the forces of the weight of the load to change. Some of the factors that can affect a load ...

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Structural dynamics - Wikipedia

Structural dynamics is a type of structural analysis which covers the behavior of a structure subjected to dynamic (actions having high acceleration) loading. Dynamic loads include people, wind, waves, traffic, earthquakes, and blasts.Any structure can be subjected to dynamic loading. Dynamic analysis can be used to find dynamic displacements, time history, and modal analysis.

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REINFORCED CONCRETE UNDER CYCLIC LOADING

For static monotonic loading, the aforementioned properties were already well studied [Barros 1995, Barros and Figueiras 1999]. However, the post peak behaviour of SFRC under compressible cyclic loading deserves an extra research effort, since the energy absorption capacity after peak load is the main property benefited by fibre reinforcement.

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About Dynamic Foundation Testing Pile Dynamics

Dynamic Load Testing predicts soil behavior including static load capacity, soil resistance distribution, pile soil load transfer characteristics, soil damping and quake values, and pile load versus movement plots (e.g. a simulated static load test). Low Strain Integrity Testing

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SEISMIC LOAD ANALYSIS - Memphis

Instructional Material Complementing FEMA 451, Design Examples Seismic Load Analysis 9 - 24 •Any metal or wood stud wall that supports more than 100 lbs/ft of vertical load in addition to its own weight •Any concrete or masonry wall that supports more than 200 lbs/ft of vertical load

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PDA Test ( Dynamic Load Testing ) - YouTube

The PILE DRIVING ANALYZER system (PDA)The driving hammer itself is used to perform High Strain Dynamic TestsHummer Drive system performance

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Influence of High Water Pressure on Static and Dynamic ...

Jun 29, 2020  In this paper, an experimental study was conducted on the influence of water pressure on concrete strength. Specimens were put in a self-designed device, applying 0–4 MPa water pressure on concrete, and then taken out for both static and dynamic compressive tests. Results showed that high water pressure caused inevitable damage to concrete, leading to 13.4#x0025; reduction in

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STRUCTURAL DESIGN OF HIGH-RISE BUILDINGS

High-rise buildings are exposed to both static and dynamic loads. Depending on ... concrete elements were used [26] which are shown in Figure2.2. In the 1970s the ... will provide point loads instead. The load distribution depends on the stiffness of

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Experimental and finite element dynamic analysis of ...

Nov 15, 2015  Due to the short duration of loading, concrete shrinkage and creep had negligible effects on the dynamic properties of beams. To assess the influence of the repeated load cycles on the frequency reduction, RC Beam 5 was also subjected to the loading scheme involving 1, 10 and 100 constant load-unload cycles at 50% of the yield load level of 1 ...

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REINFORCED CONCRETE UNDER CYCLIC LOADING

For static monotonic loading, the aforementioned properties were already well studied [Barros 1995, Barros and Figueiras 1999]. However, the post peak behaviour of SFRC under compressible cyclic loading deserves an extra research effort, since the energy absorption capacity after peak load is the main property benefited by fibre reinforcement.

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STRUCTURAL DAMAGE FROM AIR BLAST

explosion, for example, the initial de- tage of a higher yield point (or elastic formation is said to be "elastic." Pro- limit) under dynamic than under static vided it is still in the elastic range, the loading; the increase is quite large for material will recover its original form some steels. when the loading is

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Dynamic analysis of concrete pipes under the coupled ...

Oct 22, 2019  The axle load of the vehicle was obtained by loading standard blocks with a rated mass until the static pressure applied to the ground surface of each tire was 0.70 MPa, which conformed to the BZZ‐100 single‐axle and double‐wheel load design standard specified in Specifications for Design of Highway Asphalt Pavement (JTG D50‐2017). 21

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CHAPTER 3: REINFORCING STEEL MATERIAL MODEL

are pseudo-static. However, some research has focussed on investigation of steel response at dynamic strain rates. Results of dynamic testing of reinforcing steel may be used to adjust the results of pseudo-static tests to account for dynamic load effects. Evaluation of the effect of dynamic loading on steel response requires estimated

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The crack propagation velocity as a reason for the strain ...

Aug 12, 2020  According to this memory effect, the strength of the concrete not only depends on the current loading rate but also on the loading history. This means, that a concrete that is initially loaded very quickly (high strain rate) up to the range of the static strength (point I) but just below the dynamic strength (point II), and where the load ...

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Concrete Formwork Loads and Pressure Calculations - The ...

Following are the various types of loads and pressures act on concrete formwork: Vertical load. Lateral pressure of concrete. Horizontal loads. Special loads. 1. Vertical Loads on Concrete Formwork. Vertical loads are exerted on formworks and may consist of dead loads such as formwork dead load, steel reinforcement embedded in the forms, molded ...

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Modulus of Elasticity of Concrete Concrete Technology

1. Static modulus. 2. Dynamic modulus. 1. Static Elastic Modulus: The strains obtained as above are plotted against stress and a curve is obtai­ned as shown in Fig. 15.5. As concrete is an imperfect elastic material, stress strain diagram is a curved line. Hence three methods can be used to determine the modulus of elasticity. (a) Initial ...

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Structural engineering theory - Wikipedia

Structural engineering depends upon a detailed knowledge of loads, physics and materials to understand and predict how structures support and resist self-weight and imposed loads. To apply the knowledge successfully structural engineers will need a detailed knowledge of mathematics and of relevant empirical and theoretical design codes. They will also need to know about the corrosion ...

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Pavement Thickness Design

Mar 05, 2020  by the wheel load that is of particular concern. As described above, the ESAL is the standard unit of pavement damage and represents the damage caused by a single 18,000 pound axle load. Therefore, a two-axle vehicle with both axles loaded at 18,000 pounds would produce two ESALs. However, since vehicle configurations and axle loads vary ...

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Risk Analysis for Concrete Buttress Dams

Risk Analysis for Concrete Gravity Dams,” “chapter E-4, Risk Analysis for Concrete Arch Dams,” and chapter E-3, Risk Analysis for Concrete Gravity Structures” for additional discussion of sliding on weak lift joints and planes in the foundation. Buttress dams are very efficient in carrying static loads. In general, the upstream

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MSB Myndigheten för samhällsskydd och beredskap

MSB Myndigheten för samhällsskydd och beredskap

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