modelling of fibre reinforced concrete
Numerical simulation of fracture in plain and fibre reinforced concrete
... Linear Complementarity Problem FRC = Fibre Reinforced Concrete SFRC = Steel Fibre Reinforced Concrete NSC = Normal Strength Concrete HSC = High Strength Concrete TPB = Three-Point Bending FEM ... the history of fiber reinforced concrete (FRC) and the modelling of its behaviour in light of fracture mechanics 2.2 A review of fracture mechanics and quasibrittle models The advent of fracture ... compressive softening of a concrete cube and crack interaction in a beam 1.3 Objective scope of study A composite model is used to represent the heterogeneity of plain concrete consisting of coarse...
Ngày tải lên: 26/05/2014, 17:57
FATIGUE BEHAVIOUR OF FIBRE REINFORCED BITUMINOUS MIXTURES FROM INDIRECT TENSILE FATIGUE TEST
... BS 4699:1985 2.0.2 Synthetic Fibres Two types of synthetic polypropylene and polyester fibres were used in this study The fibres were used as a partial replacement of the filler, on an equal volume ... from the ITFT also showed that the 1% fibre mixes have a better fatigue behaviour than those of the 0.5% fibre mixes The higher bitumen content of the 1% fibre mixes could possibly have been responsible ... Bending moment y = Location of the LVDT from the centroid of the beam bd I = moment of inertia of the beam I = 12 Figure Initial Strain and Number of Cycles to Failure Determination...
Ngày tải lên: 01/04/2013, 22:43
measurement of properties of fiber reinforced concrete
... resistance of concrete at an early age has prompted the proposal of several methods These involve measurement of the length and width of concrete cracks Ring, rectangular, square, and combinations of ... Length Change of Drilled or Sawed Specimens of Cement Mortar and Concrete Standard Test Method of Abrasion Resistance of Concrete by Sandblasting Standard Test Method for Static Modulus of Elasticity ... K., “Methods of Testing Flexural Toughness of Steel Fiber Reinforced Concrete, ” Report, Department of Building and Civil Engineering, Institute of Industrial Science, University of Tokyo, 1980...
Ngày tải lên: 24/10/2014, 22:11
Numerical modelling of fibre suspensions in newtonian and non newtonian fluids
... two main types of fibre reinforced composites: the continuous -fibre composites (CFCs) and the short -fibre composites (SFCs) The continuous -fibre composites contain full length of reinforced particles ... kinematics of the suspending fluid and the orientation of the suspended particle or fibre A suspension of many such fibres is then constructed through the evolution of the distribution of fibre orientations ... The influence of non-Newtonian suspending fluids on fibre evolution and fibre- fibre interaction will lead to the changes of fibre orientation and hence the rheological properties of fibre suspensions...
Ngày tải lên: 15/09/2015, 17:09
design of reinforced concrete structure volume 1 DR mashhour a ghoneim
Ngày tải lên: 23/03/2014, 20:34
Seismic Design of Reinforced Concrete Bridges docx
... • Design of Joint Shear Reinforcement 38.1 Introduction This chapter provides an overview of the concepts and methods used in modern seismic design of reinforced concrete bridges Most of the design ... physical damage of a structure or a structural member Significant deformation limits are onset of cracking, onset of yielding of extreme tension reinforcement, cover concrete spalling, concrete compression ... forces of concrete and reinforcement, the depth of the concrete compression zone can be calculated Then the moment capacity can be calculated by integrating the moment contributions of concrete...
Ngày tải lên: 08/07/2014, 12:20
DETERMINATION OF THE APPROPRIATE CONTENT OF CALCIUM NITRITE AS A CORROSION INHIBITOR IN REINFORCED CONCRETE docx
... CONCLUSION General Overview of reinforced concrete corrosion under the effect of chloride ion The reinforced concrete structure is corroded very fast under the effect of chloride ion in marine ... inhibitor 30% of solid calcium nitrite solution Material and research methodology Testing samples 1.Extract of cement water Reinforced concrete samples Material and research methodology Extract of cement ... in concrete Determine the appropriate content of calcium nitrite as Extract of Cement water : Concrete grade M20, M30,M50: -W/C = 0,6; pH = 12,2 -[Cl-]: 1,2kg; 2,4kg and 6kg /m3 -Thickness of...
Ngày tải lên: 13/08/2014, 22:21
Prediction of service life due to the exposure of chlorides of reinforced concrete bridges near coastal areas in Vietnam = Dự báo tuổi thọ sử dụng của cầu bê tông cốt thép ven biển Việt Nam do xâm nhập clo (tóm tắt + toàn văn)
... humidity of environment, age of concrete and crack level of concrete, as shown in Eq 2.18 A new model “LifeConBridge” was successfully formulated to predict the service life of reinforced concrete ... service life of reinforced concrete structures due to chloride penetration - Code T2013-CT-23; 4/ Dinh, D.V and Cau, B.T., “A predictive pattern of the service life of reinforced concrete structures” ... service life of structures relating to reinforcement corrosion” The author proposed a two-stage model of the service life of reinforced concrete structures, which considered D as a constant of time...
Ngày tải lên: 26/09/2014, 09:43
commentary on design and construction of reinforced concrete chimneys (aci 307-98)
... American Concrete Institute 307-69 Specification for the Design and Construction of Reinforced Concrete Chimneys 307-88 Standard Practice for the Design and Construction of Cast-in-Place Reinforced Concrete ... of the Across-Wind Response of Chimneys,” Journal of Wind Engineering and Industrial Aerodynamics, V 14, Amsterdam, 1985, pp 153166 Rumman, W S., Reinforced Concrete Chimneys,” Handbook of Concrete ... distance of the center of gravity of the compression stress block from the neutral axis) The preceding comparative study was based on the limited test data available on reinforced concrete members of...
Ngày tải lên: 24/10/2014, 15:45
design and construction of reinforced concrete chimneys (aci 307-98)
... ratio of area of vertical outside face reinforcement to total area of concrete shell (Chapter 6) ratio of area of circumferential outside face reinforcement per unit of height to total area of concrete ... STV = = (6-1b) thermal coefficient of expansion of concrete and of reinforcing steel, to be taken as 0.0000065 per F (0.0000117 per C) modulus of elasticity of concrete, psi (MPa) – ρn(γ1 + 1) ... of two sets of cylinders (consisting of three specimens each) per 8-hr shift (slipform) or per lift (jump form) For precast sections, a minimum of two sets shall be taken from each class of concrete...
Ngày tải lên: 24/10/2014, 15:46
recommendations for design of beam-column connections in monolithic reinforced concrete structures
... place of sh and the specified yield strength of stirrups in place of fyh Center-to-center spacing of stirrups should not exceed the smallest of 1/4 of the beam width, six times the diameter of longitudinal ... Study of Shear Behavior of Reinforced Concrete Beam-Column Joints,” PMFSEL Report No 82-1, University of Texas at Austin, Feb Zhu, S., and Jirsa, J O., 1983, “A Study of Bond Deterioration in Reinforced ... each side of the joint where the edge of the column extends beyond the edge of the beam The value of mhc /2 should not be taken larger than the extension of the column beyond the edge of the beam...
Ngày tải lên: 24/10/2014, 16:04
analysis and design of reinforced concrete bridge structures
... modulus of elasticity of concrete modulus of elasticity of concrete at transfer of stress modulus of elasticity of prestressing strand modulus of elasticity of steel flexural stiffness of compression ... strength of concrete at time of initial prestress concrete stress immediately after transfer at center of gravity of prestressing steel f& = concrete bearing stress under anchor plate of post-tensioning ... percent of basic allowable stress (Chapter 5) ratio of area of bars cut off to total area of bars at section ratio of long side to short side of concentrated load or reaction area ratio of maximum...
Ngày tải lên: 24/10/2014, 16:04
control of deflection in concrete structuresstate-of-the-art report on fiber reinforced plastic (frp) reinforceme
... a reinforcement -of- choice for polymer concrete In spite of earlier research on the use of FRP reinforcement in concrete, commercial application of this product in conventional concrete was not ... the basis of the material properties of the concrete and reinforcement as is done with conventional reinforced concrete Faza and GangaRao (1993) investigated the behavior of full-size concrete ... strength 5.1.3 Bond and development of reinforcement—The evaluation of bond characteristics of FRP reinforcements is of prime importance in the design of FRP reinforced concrete members Due to variations...
Ngày tải lên: 24/10/2014, 17:25
observed deflections of reinforced concrete slab systems, and causes of large deflections
Ngày tải lên: 24/10/2014, 22:00
recommendations for design of slab-column connections in monolithic reinforced concrete structures
... the smaller of the following: (a) Design flexural strength of the slab at the face of the support over a width equal to that of the column strip (b) Sum of the design flexural strength of the slab ... American Concrete Institute 318-83 (1986) Building Code Requirements for Reinforced Concrete 318R-83 Commentary on Building Code Requirements for Reinforced Concrete 423.3R-83 Recommendations for Concrete ... MANUAL OF CONCRETE PRACTICE NOTATION cross-sectional area of reinforcing bar in.2 cross-sectional area of the slab critical section, in.2 total area of steel at a cross section, in.2 minimum area of...
Ngày tải lên: 24/10/2014, 22:00
state-of-the-art report on temperature-induced deflections of reinforced concrete members
... structures Office building - cantilever roof and floor slabs Daily temperature changes caused deflections of about one inch at the cantilever ends of roof slabs in a four-story building constructed of ... = width of beam D = dead load E = modulus of elasticity h = depth of member, blacktop thickness I = moment of inertia I cr = moment of inertia at cracked section Ie = effective moment of inertia ... connection of the exterior walls (for horizontal loads) was made when the edges of the roof were in a low position due to the effects of diurnal solar heating During service the effect of solar...
Ngày tải lên: 24/10/2014, 22:01
state-of-the-art report on fiber reinforced concrete
... Glass-Fiber Reinforced Concrete Test Method for Time of Flow of Fiber Reinforced Concrete Through Inverted Slump Cone Test Method for Flexural Toughness and First Crack Strength of Fiber Reinforced Concrete ... Fracture of Fiber Reinforced Concrete, ” Fiber Reinforced Concrete Properties and Applications, SP-105, American Concrete Institute, Detroit, 1987, pp 1-25 2.102 Mindess, S., “The Fracture of Fibre Reinforced ... Mayfield, B., Concrete Reinforced with Fibrous Wire,” Journal of the Concrete Society, Concrete, Vol 5, No 3, Mar 1971, pp 73-76 2.36 Kar, N J., and Pal, A K., “Strength of Fiber Reinforced Concrete, ”...
Ngày tải lên: 24/10/2014, 22:12
behavior of reinforced concrete girders under cyclic torsion and torsion combined with shear experimental investigation and analytical models
Ngày tải lên: 14/11/2014, 11:16
development of load and resistance factor design for frp strengthening of reinforced concrete structures
... 4-3 Histogram of Number of Girders 185 Figure 4-4 Histogram of Deck Width 185 Figure 4-5 Plot of Convergence of Monte Carlo Results as a Function of the Number of Trials ... C.6.2.4 Effect of Differences in Mean Value of FRP Properties 308 C.6.2.5 Effect of Changes in Modulus Coefficient of Variation 312 C.6.2.6 Effect of Changes in Strength Coefficient of Variation ... 61 vii 2.7 Consideration of Continued Degradation 68 2.7.1 Modes of Reinforced Concrete Degradation 68 2.7.2 Corrosion of Steel in Concrete 69 2.7.2.1 Carbonation-Induced...
Ngày tải lên: 14/11/2014, 13:32
Design of modern highrise reinforced concrete structures hiroyuki aoyama
... Hiroshi Noguchi 227 5.1 Fundamentals of FEM 5.2 FEM and Reinforced Concrete 5.2.1 History of Finite Element Analysis of Reinforced Concrete 5.2.2 Modeling of RC 5.2.2.1 Two-Dimensional Analysis ... Stress-Strain Curves of Concrete 5.4.2.2 Compressive Strength Reduction Coefficient of Cracked Concrete 5.4.2.3 Confinement Effect of Concrete 5.4.2.4 Biaxial Effect of Concrete 5.4.2.5 Tension ... definition of high durability concrete A concrete bucket is commonly used for the placement of column concrete, and placement of concrete not more than about 50 cm deep and compaction by means of an...
Ngày tải lên: 27/04/2016, 23:02