Experimentation and Modeling of Concrete Crossties and

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Modeling of steel fibre-concrete composites with Abaqus

Modeling of steel fibre-concrete composites with Abaqus. In this blog post, we will be discussing about steel fibre reinforced concrete (termed as SFRC) and will be showcasing a way (more modelling ways do exist) to model the interaction between the steel fibre (reinforcement) and the concrete (matrix).

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Concrete Materials Monograph | NIST

Along with this modeling growth has come an increased emphasis on the careful experimental measurement of concrete microstructure and properties, based on fundamental materials science. This monograph is an attempt to summarize what has been developed thus far in the computational materials science of concrete.

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PDF IS 516 (1959): Method of Tests for Strength of Concrete

IS:516-1959 Indian Standard METHODS OF TESTS FOR STRENGTH OF CONCRETE o. FOREWORD 0.1 This Indian Standard was adopted by the Indian Standards Institution on 10 November 1959, after the draft finalized by the Cement and Concrete Sectional Committee had been approved by the Building Division Council. 0.2 Testing plays an important role in controlling the quality of cement

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Online Software Downloads | FHWA - Transportation

Research Area Keywords; Congestion and Bottleneck Identification (CBI) Tool Software Download Version 1.2: January : Research, Operations, Congestion: Research, Operations, Traffic, Bottleneck: INelastic STRUCTural Analysis of Reinforced-Concrete and Steel Structures (INSTRUCT) Software: Version 1.1 Research, Infrastructure, Structures

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Prediction of Compressive Strength of Concrete: Critical

This paper presents a novel hybrid ML model (RF-FFA) for prediction of compressive strength of concrete by combining the random forests (RF) model with the firefly algorithm (FFA). The firefly algorithm is utilized to determine optimum values of two hyper-parameters (i.e., number of trees and number of leaves per tree in the forest) of the RF

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Bond between Smooth Prestressing Wires and Concrete

Apr 09,  · Pretensioned concrete ties are increasingly employed in railroad high speed and heavy haul applications. The bond between prestressing wires or strands and concrete plays an important role in determining the transfer length of pretensioned concrete members, but little research was done to characterize the transfer length in terms of steel reinforcement and concrete factors for railroad

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PDF Reports and Work Sheets

September 1, 2003 CONCRETE MANUAL 5-694.700 REPORTS AND WORK SHEETS 5-694.700 5-694.701 GENERAL A summation of data on inspection items is required at periodic intervals. The data is collected on report forms. Some forms are submitted to the Mn/DOT Concrete Engineering Unit and all other forms are filed in the Project file for internal use only

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PDF Theoretical Stress‐Strain Model for Confined Concrete

Early research on confined reinforced concrete behavior was generally carried out on small-scale concentrically loaded specimens at quasi-static rates of strain. The stress-strain model of Kent and Park (1971) for concrete confined by rectangular transverse reinforcement was based on

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MECHANISTIC DESIGN OF CONCRETE MONOBLOCK

analytical modeling and further the knowledge gained during field experimentation. 3. Using field and laboratory loading data, develop an analytical finite element (FE) model for concrete crossties and fastening systems on light rail, heavy rail, and commuter rail transit systems. 4. Develop mechanistic design recommendations for

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Chih-Hang John Wu, Ph.D. - Kansas State University

Concrete Crossties (2nd Project Extension), 05/01/ - 03/31/ , $24,937.00, Co-PI,28%, $6,982.36 5. Department of Transportation (DOT) Federal Railroad Administration (FRA), Quantifying the Effect of Prestressing Steel and Concrete Variables on the Transfer Length in Pretensioned

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A Prediction Method of Tensile Young's Modulus of Concrete

Knowledge of the tensile Young's modulus of concrete at early ages is important for estimating the risk of cracking due to restrained shrinkage and thermal contraction. However, most often, the tensile modulus is considered equal to the compressive modulus and is estimated empirically based on the measurements of compressive strength. To evaluate the validity of this approach, the tensile

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