Experimental Research and Numerical Analysis on Fiber Reinforced Plasterboard-Reinforced Concrete Composite Floor Slabs

2011 ◽  
Vol 250-253 ◽  
pp. 455-459 ◽  
Author(s):  
Xiao Lin Huan ◽  
Chang Liang Li
Keyword(s):  
Reinforced Concrete ◽  
Numerical Analysis ◽  
Simulation Experiment ◽  
Strain Curve ◽  
Mechanical Analysis ◽  
Analysis Method ◽  
Fiber Reinforced ◽  
Analysis Model ◽  
Floor Slabs ◽  
Computer Simulation Experiment

Fiber-reinforced plasterboard is patent product which was developed by Rapid Build Structure Ltd. of Australia. Fiber reinforced plasterboard can be used as baseboard , and after casting, it integrate with reinforced concrete to make up fiber reinforced plasterboard-reinforced concrete composite floor slabs. In this paper, numerical analysis method is accepted to analyze the process of bearing the loads of fiber reinforced plasterboard-reinforced concrete composite floor slabs. The calculated results, such as load- section strain curve and bearing capacity are compared with experimental data. Based on the results analysis, a mechanical analysis model is built, which provides some reference basis for computer simulation experiment of this type of structure.

scholarly journals Numerical Analysis of a Sensorized Prodder for Landmine Detection by Using its Vibrational Characteristics

2019 ◽  
Vol 9 (4) ◽  
pp. 744 ◽  
Author(s):  
Zhiqiang Wu ◽  
Hui Ma ◽  
Chi Wang ◽  
Jinhui Li ◽  
Jun Zhu
Keyword(s):  
Numerical Analysis ◽  
Simulation Experiment ◽  
Landmine Detection ◽  
Burial Depth ◽  
Analysis Method ◽  
Main Resonance ◽  
Coupling System ◽  
Adams Software ◽  
Vibrational Characteristics ◽  
Optimization Function

Prodders are widely used devices in landmine detection. A sensorized prodder has been developed to detect shallow buried landmines by their vibrational characteristics. However, the influencing mechanisms of prodder’s components on the measured vibrational characteristics are not clear, and the vibration intensity of the buried landmine decreases with burial depth. A numerical analysis method is proposed to investigate the effects of parameters of prodder-object coupling system on the measured vibrational characteristics. The calculated main resonance frequency is 109.2 Hz, which corresponds well with the published analogy result of 110 Hz, and the mathematical method is also validated by the previous experimental results. Based on the proposed analysis method, an optimized prodder is designed, whereby the signal strength can theoretically increase 122.78%, which means that a greater depth of detection can be acquired. This optimal design is verified by the simulation experiment that was conducted with the optimization function of Adams software.

Numerical Simulation of Impact Response Behavior of Rectangular Reinforced Concrete Slabs under Falling-Weight Impact Loading

2011 ◽  
Vol 82 ◽  
pp. 266-271 ◽  
Author(s):  
Norimitsu Kishi ◽  
Yusuke Kurihashi ◽  
Sara Ghadimi Khasraghy ◽  
Hiroshi Mikami
Keyword(s):  
Reinforced Concrete ◽  
Numerical Analysis ◽  
Impact Loading ◽  
Dynamic Responses ◽  
Concrete Slabs ◽  
Analysis Method ◽  
Numerical Analysis Method ◽  
Reinforced Concrete Slabs ◽  
Weight Impact ◽  
Falling Weight

A numerical analysis method for rectangular reinforced concrete slabs under falling-weight impact loading is established. The proposed method using finite element analysis incor-porates a simple constitutive model for concrete elements. The applicability was investigatedcomparing the numerical results with the experimental data. Falling-weight impact tests wereconducted on reinforced concrete slabs with different supporting conditions. These were: a slabwith line supports on four sides; a slab with two line supports on two opposite sides (the othertwo sides were free); and a slab with one line and two corner-point supports. Following resultswere obtained from this study: (1) the time histories of dynamic responses are well predictedby using proposed numerical analysis method; (2) maximum reaction forces and the maximumdeflections in the slab center below the loading point, and characteristics of the damped freevibration after falling weight was rebounded, can be better predicted; and (3) major crackpatterns can be roughly predicted despite of support conditions.

scholarly journals Dynamic Constitutive Model Analysis of High Parameter Steel Fiber Reinforced Concrete

Symmetry ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 377 ◽  
Author(s):  
Dong Luo
Keyword(s):  
Reinforced Concrete ◽  
Constitutive Model ◽  
Steel Fiber ◽  
Strain Curve ◽  
State Equation ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Strain Rate Effects ◽  
Damage Evolution Equation

The traditional Holmquist-Johnson-Cook (HJC) constitutive model does not consider the effect of crack resistance, reinforcement and toughening effect of high parameter steel fiber on original concrete. The causes of the analysis effect of the high parameter reinforced concrete is not obvious. To address this problem, a dynamic constitutive model of high parameter steel fiber reinforced concrete is built in this paper. Based on the static constitutive model built by static force, a dynamic constitutive model is built based on the similarity between static and dynamic stress-strain curve. On this basis, the yield surface equation, state equation, and damage evolution equation of HJC constitutive model are constructed. An improved HJC constitutive model for high parameter steel fiber reinforced concrete is obtained by introducing the modification of the steel fiber reinforced, toughened, and strain rate effects into the HJC constitutive model. Dynamic analysis of high parameter steel fiber reinforced concrete is achieved by using the improved model. Experimental results show that the proposed model is effective in analyzing high parameter concrete and has strong applicability.

Polypropylene Fiber Reinforced Concrete for Airfield Pavements:Modeling of Stress-Strain Curve Under Compression

2011 ◽  
Vol 261-263 ◽  
pp. 171-177
Author(s):  
Tammam Merhej ◽  
De Cheng Feng
Keyword(s):  
Reinforced Concrete ◽  
Analytical Model ◽  
Volume Fraction ◽  
Polypropylene Fiber ◽  
Strain Curve ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Polypropylene Fiber Reinforced Concrete

An analytical model for compressive stress-strain curve of polypropylene fiber reinforced concrete (PPFRC) was proposed. The polypropylene fiber used was 60-mm long twisted fiber with aspect ratio of 120. The fiber was added in three volume fractions 0.2%, 0.4% and 0.6%. Tow concrete mixtures with varying water-cement ratio were used. The accuracy of the proposed model was evaluated by comparing the area under stress-strain curves for experimental and analytical model. The results showed good agreement between the experimental and analytical curves. In addition; empirical equations were proposed to quantify the effect of polypropylene fiber on compressive strength, strain at peak stress, and toughness of concrete in terms of fiber volume fraction.

Analysis of the Axial Tensile Properties of Multidirectional Filament Wound Tubes

2008 ◽  
Vol 375-376 ◽  
pp. 107-112
Author(s):  
Xia Xie ◽  
Ya Ming Jiang ◽  
Guan Xiong Qiu ◽  
Peng Wang ◽  
Ai Fen Xu
Keyword(s):  
Tensile Properties ◽  
Tensile Load ◽  
Strain Curve ◽  
Mechanical Analysis ◽  
Test Results ◽  
Analysis Model ◽  
Filament Wound ◽  
Axial Tensile ◽  
Laminate Theory ◽  
Axial Reinforcement

This paper studied the axial tensile properties of the multidirectional filament wound tubes (MFWT) both theoretically and experimentally. Based on the Classical Laminate Theory, the mechanical analysis model of the tubes was established and implemented by the program of Matlab language, from which the axial tensile strength was predicted. Then the specimens with different parameters were fabricated and tested under axial tensile load respectively. The theoretical model met the experimental results well. Furthermore, the test results, the stress-strain curve and the failure form were analyzed, which showed that the axial properties of the MFWT were obviously strengthened with the incorporation of the axial reinforcement.

Sign in / Sign up

Export Citation Format

Share Document