Optimum Design of Prestressed Concrete Beams

Optimum Design of Prestressed Concrete Beams

Optimum Design of Prestressed Concrete Beams P. B. R. Dissanayake and S. Jothy Karma Abstract: One of the motivations in optimizing structures is to reduce the overall weight, which often results in reduced material cost. Efficiency implies minimum cost or minimum weight while satisfying a variety of strength and stiffness requirements.

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Optimum design of prestressed concrete beams using ...

10%  Aug 09, 2013  This paper is concerned with the cost minimization of prestressed concrete beams using a special differential evolution-based technique. The optimum design is posed as single-objective optimization problem in presence of constraints formulated in accordance with the current European building code. The design variables include geometrical dimensions that define the

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Optimum design of prestressed beams - ScienceDirect

Sep 01, 1972  Optimum Design of Prestressed Beams 581 In examples 3,4, 5,6 the cost functions are the same (Ci = 1, C^ = 1) with a high cost of the prestressing steel compared with that of the concrete. The only difference in the con- straints is in d^ which varies from 1.00 m

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Optimum Design of Prestressed Beams - Concrete

Keywords: Beams (supports), computer programs, optimi-zation, prestressed concrete, structural design. Date: 9/1/1971. Abstract: Presents a method for obtaining the minimum cost design of a prestressed concrete beam, with costs stated in terms of unit costs of the constituent which can be specified by the designer.

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Optimum Design of Partially Prestressed Concrete ‎Beams

The research presents a formulation for optimum design of partially prestressed concrete beams based on elastic analysis. The optimum ‎design is selected to satisfy the limitations of ACI-Code 2014. The objective function is the cost of the beam. The

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OPTIMAL STRUCTURAL DESIGN OF PRESTRESSED CONCRETE

The optimum design of the prestressed concrete beams is the one with minimum cross-sectional area and material costs which satisfies all design constraints. Theses constraints in case of simple beams as per ECC’01 can be linearized and

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Optimum Design of Prestressed Structures

You need to login to ask any Questions from chapter Composite-Beams-and-Deflections of prestressed-concrete-structures. Chapter: Composite-Beams-and-Deflections . 1. The primary aim of structural optimization is to determine _____ ... The process of optimum design of prestressed concrete structures may be looked as _____

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Optimum Design of Composite Prestressed Concrete Girder ...

In 1971, Goble and Lapay [5] presented a method for obtaining the optimum design of prestressed concrete beam considering the total cost unit surface area of the member as the objective function. The objective function was including the cost per unit volume of concrete

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Prestressed Concrete - Structural Engineering - Beyond ...

Apr 11, 2021  Composite-Action Dowel Reinforcement • Example 7: Design of Web Reinforcement for Shear • SI Expressions for Shear in Prestressed Concrete Beams • Design of Prestressed Concrete Beams Subjected to Combined Torsion, Shear, and Bending in Accordance with the ACI 318-02 Code. 8.8 Camber, Deflection, and Crack Control 8-52

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Optimum Design of Prestressed Beams - Concrete

Keywords: Beams (supports), computer programs, optimi-zation, prestressed concrete, structural design. Date: 9/1/1971. Abstract: Presents a method for obtaining the minimum cost design of a prestressed concrete beam, with costs stated in terms of unit costs of the constituent which can be specified by the designer.

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Optimum Design of Partially Prestressed Concrete ‎Beams

The research presents a formulation for optimum design of partially prestressed concrete beams based on elastic analysis. The optimum ‎design is selected to satisfy the limitations of ACI-Code 2014. The objective function is the cost of the beam. The

get price

OPTIMAL STRUCTURAL DESIGN OF PRESTRESSED

The optimum design of the prestressed concrete beams is the one with minimum cross-sectional area and material costs which satisfies all design constraints. Theses constraints in case of simple beams as per ECC’01 can be linearized and

get price

Optimum design of prestressed concrete beams by a modified ...

Jan 25, 2003  A computer program has been developed for the optimum design of prestressed concrete beams under flexure. Optimum values of prestressing force, tendon configuration, and cross-sectional dimensions are determined subject to constraints on the design variables and stresses. 28 constraints have been used including flexural stresses, cover requirement, the aspect ratios for top

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Optimum Design of Prestressed Structures

You need to login to ask any Questions from chapter Composite-Beams-and-Deflections of prestressed-concrete-structures. Chapter: Composite-Beams-and-Deflections . 1. The primary aim of structural optimization is to determine _____ ... The process of optimum design of prestressed concrete structures may be looked as _____

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OPTIMUM PRESTRESS, ANALYSIS, AND ULTIMATE STRENGTH

Presents 13 recommended cross-sections for prestressed concrete sheet piles, establishes standards for selecting optimum prestress, and makes a detailed analysis of sheet piling with interior transverse supports to meet optimum criteria. Ultimate strength design equations are developed for both symmetrical and eccentric prestressing.

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Optimum Design of Composite Prestressed Concrete

In 1971, Goble and Lapay [5] presented a method for obtaining the optimum design of prestressed concrete beam considering the total cost unit surface area of the member as the objective function. The objective function was including the cost per unit volume of concrete

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Optimum design of precast prestressed concrete structural ...

Dec 11, 2018  A step ahead in the field of optimization of prestressed bridge decks is the simultaneous search of the geometry and size of the prestressing cables. 7 G. G. Goble and W. S. Lapay ACI JOURNAL SEPTEMBER 2006 Optimum design of prestressed beams The optimum design is selected to satisfy the constrains using techniques of nonlinear programming.

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OPTIMUM DESIGN OF BEAMS FOR INDUSTRIAL CONCRETE

Precupanu, D., et al.: Optimum Design of Beams for Industrial Concrete Roofs 136 ut, the problem, in it’s complexity, remains open to studies that are necessary, further, for answering the question if the realised structures are really the most

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Optimum design of post-tensioned flat slabs with its ...

It was concluded that the optimum design of flat slab systems can achieve large amount of cost saving. However, optimization process can be cumbersome if the size of the building is large. The cost optimization of prestressed concrete flat slabs was carried out in . The thickness of the concrete slab, the total number of prestressing tendons in ...

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Optimum Cost of Prestressed and Reinforced Concrete Beams ...

Two GA models were proposed to obtain the optimum design of simply supported reinforced concrete beams and prestressed concrete beams based on ACI 318-05. An Excel solver which uses the generalised reduced gradient method (representing classical optimization methods) was prepared in order to compare its results with those obtained from the GA ...

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OPTIMUM DESIGN OF CONTINUOUS PRESTRESSED

optimum design of continuous prestressed concrete double tee beam bridges with varying cable forces by w. m. d. n. ranasinghe, m. t. r. jayasinghe

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1980 Probability Design of Prestress Concrete Poles ...

A probability based procedure is presented for the optimum design of prestressed concrete poles. The cube strength of concrete, the ultimate strength of steel, the jacking stress at transfer, the cross sectional dimensions of the pole, the lever arm at which the load acts and the magnitude of the load acting on the pole are treated as random ...

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Cost Optimum Design of Posttensioned I-Girder Bridge

mum cost design of prestressed concrete bridges using the linear programming method. Cohn and MacRae (1984a, b) studied the minimum cost design of fully prestressed and partially prestressed concrete I-beams with fixed cross-sectional geometry using a 1Professor, Dept. of Civil Engineering, Bangladesh Univ. of Engineer-

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Optimum Design of Prestressed Structures

You need to login to ask any Questions from chapter Composite-Beams-and-Deflections of prestressed-concrete-structures. Chapter: Composite-Beams-and-Deflections . 1. The primary aim of structural optimization is to determine _____ ... The process of optimum design of prestressed concrete structures may be looked as _____

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Optimum design of prestressed concrete beams by a modified ...

Jan 25, 2003  A computer program has been developed for the optimum design of prestressed concrete beams under flexure. Optimum values of prestressing force, tendon configuration, and cross-sectional dimensions are determined subject to constraints on the design variables and stresses. 28 constraints have been used including flexural stresses, cover requirement, the aspect ratios for top

get price

Optimum topology and shape design of prestressed concrete ...

Jun 10, 2009  The purpose of this study is to optimize the topology and shape of prestressed concrete bridge girders. An optimum design approach that uses a genetic algorithm (GA) for this purpose is presented. The cost of girders is the optimum design criterion. The design variables are the cross-sectional dimensions of the prefabricated prestressed beams, the cross-sectional area of the

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Optimum design of continuous partially prestressed ...

The resulting optimum design formulation at the member level is highly nonlinear in cost function and constraints with a total of thirty design variables. A computer program PCBDOS, which stands for prestressed concrete beams optimization system, is developed. Parametric study related to section height and shape optimization, load intensity and

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OPTIMUM DESIGN OF BEAMS FOR INDUSTRIAL CONCRETE

Precupanu, D., et al.: Optimum Design of Beams for Industrial Concrete Roofs 136 ut, the problem, in it’s complexity, remains open to studies that are necessary, further, for answering the question if the realised structures are really the most

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Design optimization of continuous partially prestressed ...

Apr 17, 1995  An effective formulation for optimum design of two-span continuous partially prestressed concrete beams is described in this paper. Variable prestressing forces along the tendon profile, which may be jacked from one end or both ends with flexibility in the overlapping range and location, and the induced secondary effects are considered.

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Optimum design of post-tensioned flat slabs with its ...

It was concluded that the optimum design of flat slab systems can achieve large amount of cost saving. However, optimization process can be cumbersome if the size of the building is large. The cost optimization of prestressed concrete flat slabs was carried out in . The thickness of the concrete slab, the total number of prestressing tendons in ...

get price

Cost Optimum Design of Posttensioned I-Girder Bridge

mum cost design of prestressed concrete bridges using the linear programming method. Cohn and MacRae (1984a, b) studied the minimum cost design of fully prestressed and partially prestressed concrete I-beams with fixed cross-sectional geometry using a 1Professor, Dept. of Civil Engineering, Bangladesh Univ. of Engineer-

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Precast Prestressed Beam Bridges

Prestressed Beam Bridges Tierra Armada, S.A. has significantly contributed to the development and consoli- ... -Optimum design, calculation and construction of bridge decks-Utilization of High Performance Concrete and Prestressing techniques that allow for an optimum design of transversal deck sections, as well as minimizing material wastage.

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Flexural Design Of Prestressed Concrete Beam - New Images Beam

Oct 28, 2019  Optimum of prestressed and reinforced concrete beams using design procedure for prestressed concrete beams nino prestressed concrete springerprofessional de flexural behavior of precast concrete box beams post tensioned endix c parison of width prediction equations for. Related.

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VTOP – an improved software for design optimization of ...

VTOP – an improved software for design optimization of prestressed concrete beams S. Hernandez, D. Marcos, A. N. Fontan J. Diaz School of Civil Engineering, University of Coruña, La Coruña, Spain Abstract Optimum tendon layout of prefabricated prestressed concrete beams was an early application of design optimization methodologies.

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1980 Probability Design of Prestress Concrete Poles ...

A probability based procedure is presented for the optimum design of prestressed concrete poles. The cube strength of concrete, the ultimate strength of steel, the jacking stress at transfer, the cross sectional dimensions of the pole, the lever arm at which the load acts and the magnitude of the load acting on the pole are treated as random ...

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(PDF) Multi-objective reliability-based optimization of ...

Monte Carlo simulation for conducting multiobjective reliability-based design optimization (MORBDO) of prestressed concrete beams, using e-constraint The problem defined in Eq. (2) involves a procedure to obtain method.

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Precast, Prestress Bridge Girder Design Example

Precast, Prestressed Girder Design Example –PGSuper Training ( 2/4/2020) 1 . 1 Introduction . The purpose of this document is to illustrate how the PGSuper computer program performs its computations. PGSuper is a computer program for the design, analysis, and load rating of precast, prestressed concrete girder bridges.

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