Optimum Design of Composite Hybrid Plate Girders

Dhillon, Balaur S.; Kuo, C. P.

doi:10.1061/(asce)0733-9445(1991)117:7(2088)

Cited by 15 publications

(4 citation statements)

References 9 publications

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“…Regarding the steel section, considering that the upper compression flange is kept braced out of plan till concrete deck hardening, where there will be no reduction in the allowable normal stress due to lateral torsional buckling, the allowable normal stress for noncompacted, nonhybrid section is 0.58 f y . For noncompacted, hybrid sections, AASHTO Section 10.53.2 [1] suggested a reduction factor (R) to reduce the allowable stresses in the flanges. is reduction factor could be calculated as follows:…”

Section: Phase 1: Generating the Optimized Databasementioning

confidence: 99%

“…In this regard, Balaur S. Dhillon and Chen-Hsing Kuo [1] carried out the first trial to optimize the design of composite, hybrid plate girders using generalized geometric programming (GGP) technique. Samer Hendawi and Dan M. Frangopol [2] implement the corrosion effects in reliability-based optimization of composite hybrid plate girders using time-independent reliability-based structural optimization (RBSO) approach.…”

Section: Introductionmentioning

confidence: 99%

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Optimum Design of Fully Composite, Unstiffened, Built-Up, Hybrid Steel Girder Using GRG, NLR, and ANN Techniques

El-Aghoury

Ebid

Onyelowe

2022

Journal of Engineering

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Composite steel beams are commonly used element in multistorey steel buildings to enhance floor economy and serviceability and provide more clear height. Due to the low level of stress in the webs of such beams, hybrid sections are used where the flanges have higher strength than the webs. A lot of earlier research was carried out to optimize the design of the hybrid and nonhybrid composite steel beams under both static loading and dynamic behavior. However, there is still a need to develop a more practical optimization method. The aim of this research is to develop simple and practical equations to determine the optimum cross section dimensions for both shored and unshored, simply supported, hybrid and nonhybrid, composite steel beam under static loads. To achieve that goal, a research program of two phases was carried out. The first phase was generating a database of 504 composite beams with different steel grades for flanges and webs, subjected to different values of bending moment. The cross section of each beam in the database was optimized using GRG technique to minimize the cost considering the unit price of each steel grade. In the second phase, the generated database was divided into training and validation subsets and used to develop two predictive models using Nonlinear Regression (NLR) technique and Artificial Neural Network (ANN) technique to predict the optimum cross section dimensions and hence the optimum weight and cost. The accuracies of the developed models were measured in terms of average error percent. NLR and ANN models showed average error percent of 16% and 11%, respectively.

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Section: Phase 1: Generating the Optimized Databasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimum Design of Fully Composite, Unstiffened, Built-Up, Hybrid Steel Girder Using GRG, NLR, and ANN Techniques

El-Aghoury

Ebid

Onyelowe

2022

Journal of Engineering

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“…Computer programs such as FORTRAN 77 have been used for aspects of highway optimization design, but did not integrate CAD drawings (Dhillon 1991). Computer programs have also been used in the past for optimizing of road network planning (Kiyota 1999).…”

Section: Literature Reviewmentioning

confidence: 99%

Object-based 3D Intelligent Model for Construction Planning/Simulation in a Highway Construction

Shen

Orr

Choi

et al. 2014

Construction Research Congress 2014

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This study proposes a 3D visualization model in highway design/construction that electronically represents information of highway projects. The 3D model will be based on the STEP (Standard for the Exchange of Product model data), which is an open standard, so it can be used as data structures. Since the design model includes integrated resources to represent 3D geometric shape and project management information of the infrastructure, the built visualization model will allow end-users to extract the necessary data from the object based 3D intelligent model. This integrated data model is expected to provide practical engineering information to improve the design/construction process. This study presents the framework for the integration of application programs such as existing 3D/CAD programs used in practice by applying the STEP-based information model and information technologies. With the system integration framework composed of the information model, data repository, application program, and application programming interface, this research proposes establishing a prototype system according to the system integration framework so that end-users can manage information of an infrastructure in an integrated computing environment. The final output of this research is to present a methodology to automatically generate a construction schedule from infrastructure facility design information. This method is performed by the full connection between construction quantity takeoff analysis and design information by using the information model.

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“…A general mathematical formulation by Dhillon et al [18] for the optimum design of unstiffened and stiffened, composite, hybrid plate girders. Using the generalized geometric programming (GGP) technique, the composite-hybrid-plate-girder problem was formulated as a mathematical problem that uses the weight of the girder as the objective function, with the section properties and strengths providing the problem constraints.…”

Section: Hybrid Composite Structurementioning

confidence: 99%

Design and analysis of a hybrid steel/composite pipe for high-pressure applications

Briers¹,

Jennings²

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Design and Analysis of a Hybrid Steel/Composite Pipe for High-Pressure Applications William Jennings Briers III Once limited almost exclusively to aerospace applications, the use of composite materials has become widespread among many high performance industries. Today's petroleum industry is requiring piping systems to sustain high pressures, impact, rugged handling, and harsh environmental conditions such as corrosion and temperature. Advances in the last decade of engineered materials have opened the way for more conversions from metal to composites. The objective of this research is to develop a lightweight composite pipe that meets the performance requirements of an existing high-pressure steel pipe. This development is crucial to the petroleum industry where hydraulic-fracturing services are demanding lighter weight materials while maintaining low cost and high reliability. A hybrid steel/composite pipe was designed and analyzed using the finite element analysis (FEA) programs SDRC ® IDEAS ® and ABAQUS ®. The design consisted of a thinwalled steel liner with a composite over-wrap. It employed the use of unique end fittings, which transfer longitudinal and torque loads from the steel to the composite. This research is believed to be the first instance where autofrettage is used on a metal lined composite pipe. Results from FEA were used to validate the design and fabricate a fullscale prototype. The prototype was successfully tested and exceeded maximum design pressure. vi

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Optimum Design of Composite Hybrid Plate Girders

Cited by 15 publications

References 9 publications

Optimum Design of Fully Composite, Unstiffened, Built-Up, Hybrid Steel Girder Using GRG, NLR, and ANN Techniques

Optimum Design of Fully Composite, Unstiffened, Built-Up, Hybrid Steel Girder Using GRG, NLR, and ANN Techniques

Object-based 3D Intelligent Model for Construction Planning/Simulation in a Highway Construction

Design and analysis of a hybrid steel/composite pipe for high-pressure applications

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