Download or read book Nonlinear Finite Element Analysis of Reinforced Concrete Pipes written by Husain Mohammad and published by LAP Lambert Academic Publishing. This book was released on 2012-04 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study deals with structural behavior of reinforced concrete pipes under various loading and support conditions by using nonlinear three-dimensional isoparametric 20-node brick elements. the computer program of three dimensional nonlinear finite element analysis of reinforced concrete structures, written by Al- Shaarbaf is utilized. The behavior of concrete is investigated by using twenty-node brick elements. The reinforcement bars are idealized as axial members embedded within the brick elements with perfect bond between the concrete and the steel curved bars in a brick element were approximated by straight bars parallel to the main coordinate axes. The behavior of concrete in compression is simulated by an (Elastic- Plastic Work Hardening Model) followed by a perfect plastic response, which is terminated at the onest of crushing. In tension, a smeared crack model with fixed orthogonal cracks has been used with the inclusion of models for the retained post-cracking tensile stress and reduced shear transfer modulus. Loading of the pipes and support conditions were properly considered according to the characteristics of the problem.

Download or read book Finite Element Analysis for ASTM C 76 Reinforced Concrete Pipes with Reduced Steel Cage written by Amin Darabnoush Tehrani and published by . This book was released on 2016 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete pipes (RCP) are composite pipes which have been widely used in the industry for more than ten decades. They are generally used for sewerage, water drainage, and industrial waste water. There are two methods for designing the RCP so that it will bear the soil weight and the live load on it: Indirect design (ID) and direct design (DD) methods. ASTM C76 (1) classifies pipes into five categories. The five categories of pipes have been classified in order of ascending pipe diameter with their required load and reinforcement's area. Typically, there are two reinforcement types: circumferential and longitudinal. Circumferential reinforcement is placed in two layers in the thickness of the pipe and the longitudinal reinforcements are placed around the circumferential reinforcements. All these reinforcements are placed in one layer, also known as cages. The task of placing two cages of reinforcement is not only tedious but also time consuming, expensive and sometimes unnecessary, especially for pipe classes III, IV and V. In this study, a three dimensional non-linear finite element modeling has been generated by using Abacus, Version 6.14-3, a program which is well known for non-linear finite element analysis, to simulate real pipe behavior for implementation of single cage instead of double cages reinforcements. Simulations were generated for classes III, IV and V with pipe diameters of 24, 36, 48, 60 and 72 in. Pipes were modeled by using three different single-cage reinforcement locations, in addition to the original double cage concrete pipe. After which a total of 80 simulations were conducted in order to compare the difference between the single and double cage behavior. In order to verify the simulations, three ASTM standard Three Edge Bearing tests were performed. Pipes were selected and tested according to ASTM C76 and ASTM C497 standards specifications. The study showed one cage of reinforcements in some pipes, satisfies all the ASTM requirements. Thereby making it possible for manufacturers to produce reinforced concrete pipes with a smaller amount of steel reinforcements per foot.

Download or read book Non linear Finite Element based Material Constitutive Law for Zero Slump Steel Fiber Reinforced Concrete Pipe Structures written by Alena Mikhaylova and published by . This book was released on 2014 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study presents a comprehensive investigation of performance and behavior of steel-fiber reinforced concrete pipes (SFRCP). The main goal of this study is to develop the material constitutive model for steel fiber reinforced concrete used in dry-cast application. To accomplish this goal a range of pipe sizes varying from 15 in. (400 mm) to 48 in. (1200 mm) in diameter and fiber content of 0.17%, 0.25%, 0.33%, 0.5%, 0.67% and 83% by volume were produced. The pipes were tested in three-edge bearing condition to obtain the load-deformation response and overall performance of the pipe. The pipes were also subjected to hydrostatic joint and joint shear tests to evaluate the performance of the fiber-pipe joints for water tightness and under differential displacements, respectively. In addition, testing on hardened concrete was performed to obtain the basic mechanical material properties. High variation in the test results for material testing was identified as a part of experimental investigation. A three-dimensional non-linear finite element model of the pipe under the three edge bearing condition was developed to identify the constitutive material relations of fiber-concrete composite. A constitutive model of concrete implementing the concrete plasticity and continuum fracture mechanics was considered for defining the complex non-linear behavior of fiber-concrete. Three main concrete damage algorithms were examined: concrete brittle cracking, concrete damaged plasticity with adaptive meshing technique and concrete damaged plasticity with visco-plastic regularization. The latter was identified as the most robust and efficient to model the post-cracking behavior of fiber reinforced concrete and was used in the subsequent studies. The tension stiffening material constitutive law for composite concrete was determined by converging the FEM solution of load-deformation response with the results of experimental testing. This was achieved by iteratively modifying the non-linear material model of concrete properties in tension until the load-deformation response matched the one of experimental testing. Based on the results of finite element simulations the mathematical expressions for the material constitutive law for concrete composite were obtained using the least squares approach. Internal moments, shear and thrust forced developed in the pipe under the three-edge bearing were determined. In addition, finite element model of pipe-soil interaction was developed to determine the deflections of the pipe under a range of backfill heights. A part of this research was a qualitative evaluation of fiber distribution in concrete pipe using statistical approach. The study revealed that the variation of fiber distribution varies with the fiber content in concrete. This study has resulted in the development of a stand-alone performance based specification (ASTM C1765-13) for steel fiber reinforced concrete pipes, which has been approved in 2013.

Download or read book Nonlinear Seismic Analysis and Design of Reinforced Concrete Buildings written by P. Fajfar and published by CRC Press. This book was released on 1992-03-20 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forty scientists working in 13 different countries detail in this work the most recent advances in seismic design and performance assessment of reinforced concrete buildings. It is a valuable contribution in the mitigation of natural disasters.

Download or read book Nonlinear Finite Element Analysis of Reinforced Concrete Deep Members written by Riadh Saleh Hassan Al-Mahaidi and published by . This book was released on 1980 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonlinear Finite Element Analysis of Reinforced Concrete Subassemblages written by Amir S. Ayoub and published by . This book was released on 1995 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Additional Finite Element Method for Analysis of Reinforced Concrete Structures at Limit States written by Ermakova A.V. and published by Издательство АСВ. This book was released on 2012 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presents the theoretical basis of Additional Finite Element Method (AFEM), which is a variant of the Finite Element Method (FEM) for analysis of reinforced concrete structures at limit state. AFEM adds to the traditional sequence of problem by FEM the units of the two well-known methods of the structural design: method of additional loads and limit state method. The problem is solved by introduction of ideal failure models and additional design diagrams formed from additional finite elements, where each AFE describes the limit state reached by the main element. The main relations defining the properties of AFEs as well as the examples of the use of Additional Finite Element Method for analysis of reinforced concrete structures at limit state are given in the work too.

Download or read book Nonlinear finite element analysis of reinforced concrete membranes written by Frank J. Vecchio and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonlinear Finite Element Analysis of Precast Reinforced Concrete Beam Column Joint written by and published by . This book was released on 2021 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Finite Element Analysis of Reinforced Concrete Structures II written by Jeremy Isenberg and published by . This book was released on 1993 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection contains 10 papers discussing finite element analysis of reinforced concrete structures presented at an international workshop held in New York, New York, June 2-5, 1991.

Download or read book Nonlinear finite element analysis of reinforced concrete planar structures written by Honggun Park and published by . This book was released on 1994 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonlinear Finite Element Analysis of Reinforced Concrete Under Short Term Monotic Loading written by Fariborz Barzegar-Jamshidi and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonlinear Finite Element Analysis of Reinforced Concrete Deep Members written by Riadh Saleh Hassan Al-Mahaidi and published by . This book was released on 1978 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design Proposal for Synthetic Fiber Reinforced Concrete Pipes Using Finite Element Analysis written by Fouad T. Al Rikabi and published by . This book was released on 2020 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic fibers have been used recently to minimize the use of steel reinforcement cages in concrete pipes. Several studies have been conducted to determine the optimum fiber dosage complying with ASTM C76, Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe , strength requirements. There is still need for a comprehensive design method covering a wide range of pipe diameters. The objective of this study was to develop design tables for synthetic fiber-reinforced concrete pipe similar to those proposed in the ASTM C76 standard. The finite element model of the three-edge bearing test was calibrated and validated using the experimental results from previous work by the authors. The linear and nonlinear behavior of the synthetic fiber-reinforced concrete material was characterized using the concrete damage plasticity (CDP) model. For input data representing concrete material properties, compression strength, tensile strength, and modulus of elasticity were determined for five fiber dosages: 0, 4.75, 6, 7, and 9 kg/m 3 . Based on the experimental results, a new modified compression model was adopted to represent the compression behavior of fiber-reinforced concrete in the finite element models. Also, the tension behavior was defined using a model proposed by past research. A parametric study was conducted on four parameters: pipe diameter, pipe wall thickness, fiber dosage, and steel cage area. The parametric study results were summarized in tables that can be used as a reference for a new synthetic fiber-reinforced concrete pipe standard.

Download or read book Nonlinear Finite Element Analysis of Reinforced Concrete Frames written by Quazi Anwar Hossain and published by . This book was released on 1974 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonlinear Finite Element Analysis of Reinforced Concrete Structures Subjected to Blast Loading written by Fouad Bakheet Aboud Beshara and published by . This book was released on 1991 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonlinear Finite Element Analysis of Reinforced Concrete Plates written by Steinar Berg and published by . This book was released on 1973 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: