Optimum performance-based design of eccentrically braced frames

Fathali, Mohammad Ali; Vaez, Seyed Rohollah Hoseini

doi:10.1016/j.engstruct.2019.109857

Cited by 29 publications

(11 citation statements)

References 22 publications

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“…This involved analysis of the said structure for better seismic performance. [24] In this paper, five different planar truss models that are commonly used for short spanned roof structures have been considered. The objective function is developed for each one of them to find optimal cross sections with intent to achieve minimum weight and hence minimum cost of material.…”

Section: Centre Of Mass Optimization (Cmo)mentioning

confidence: 99%

Bio-Inspired Algorithms for Optimal Design of Trusses

Jayaram¹

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Trusses are one of the major civil engineering structural articulations that are studied for optimized design. However, application of bio-inspired algorithms for the design of planar trusses is found to be scanty. In this paper, four bio-inspired algorithms namely, Elitism based genetic algorithm (EBGA), Ant colony optimization (ACO), Artificial honey bee optimization (AHBO), and Particle swarm optimization (PSO) algorithms have been implemented for the optimization of size of the members of planar trusses. For this purpose, 4-planar trusses have been considered. The results show that the said algorithms vary marginally as far as the optimized weights are concerned. However, the differences are seen in terms of number of iterations required for convergence and standard deviation of weights. In this context, PSO and EBGA, converged quickly for all the four examples considered. Both the algorithms also showed lower values of standard deviation with respect to the optimized overall weight of the trusses.

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Section: Centre Of Mass Optimization (Cmo)mentioning

confidence: 99%

Bio-Inspired Algorithms for Optimal Design of Trusses

Jayaram¹

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Here F a and F v are site coefficients determined from FEMA-273, and the values of the response acceleration parameters S S and S 1 obtained from Table 1 [27].…”

Section: Performance-based Optimum Seismic Design (Pbosd)mentioning

confidence: 99%

Factors in the Relationship Between Optimal CO2 Emission and Optimal Cost of the RC Frames

Mottaghi

Izadifard

Kaveh

2020

Period. Polytech. Civil Eng.

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Nowadays, reduction of greenhouse gases emissions from the construction industry is seriously under investigation. The aim of this study is to investigate the various effective factors on the relationship between optimal cost and optimal carbon dioxide emissions of the reinforced concrete structures with nonlinear structural behavior. A four-story reinforced concrete frame is designed for various peak ground accelerations (PGAs) and all ductility classes according to Iran’s seismic resistant design-2800 code, as well as for different concrete classes. The frames are optimally designed according to ACI 318-08 and FEMA codes. The results of optimal designs show that the design of structures with medium and high ductility class produces less cost and CO2 emissions than the low ductility class. On the other hand, the relationship between cost and CO2 emissions shows that in the low ductility class, increasing the percentage of the optimal cost can greatly reduce the amount of CO2 emissions. PGA design has a significant effect on reducing optimal cost and CO2 emissions. Especially in the low ductility class, reducing this parameter can greatly decrease the amount of the objective functions. Also, the use of concrete with low class can reduce the cost and CO2 emissions but the effect of this parameter in the objective is very small.

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“…The first stage satisfied load and resistance factor design (LRFD) seismic design requirements for two dominant load combinations, while the second stage satisfied performance criteria related to the four FEMA 356 PLs. Fathali and Hoseini‐Vaez [ 7 ] used eccentrically braced frames to perform PBSDO per FEMA356. Both of the studies mentioned above used concentrated plastic hinge models, neglecting the negative slope of the backbone curves.…”

Section: Introductionmentioning

confidence: 99%

Evaluating ASCE 41‐17 performance‐based provisions on optimally designed steel moment frames

Ebadijalal

Shahrouzi

2022

Structural Design Tall Build

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In this study, the ASCE 41-17 nonlinear static procedure for steel moment-resisting frames is evaluated using a three-phase constraint handling procedure. For the first time, advanced performance measures of ASCE 41-17 are quantified during the optimization process by constructing concentrated plasticity models of the standard.Covariance matrix adaptation in evolution strategies (CMA-ES) is used to obtain optimal designs for three-and nine-story illustrative examples. Active and inactive constraints are discussed in the current performance-based design methodology as a guide for future research. The seismic evaluation procedure outlined in FEMA P695 is applied to 147 optimal designs. Plastic hinge models explicitly simulate cyclic deterioration in nonlinear dynamic analyses. The numerical results conclusively demonstrate that the design procedure provides an acceptable margin of safety from collapse of the treated frames. Moreover, there is no significant relationship between the structural weights and the collapse margin ratios for such optimally designed structures.

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Optimum performance-based design of eccentrically braced frames

Cited by 29 publications

References 22 publications

Bio-Inspired Algorithms for Optimal Design of Trusses

Bio-Inspired Algorithms for Optimal Design of Trusses

Factors in the Relationship Between Optimal CO2 Emission and Optimal Cost of the RC Frames

Evaluating ASCE 41‐17 performance‐based provisions on optimally designed steel moment frames

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