Optimal design of the seismic retrofitting of reinforced concrete framed structures using BRBs

Velasco, Luis; Hospitaler, Antonio; Guerrero, Héctor

doi:10.1007/s10518-022-01394-z

Cited by 4 publications

(1 citation statement)

References 49 publications

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“…7,8 BRBFs eliminate the buckling failure mode through Buckling-Restrained Braces (BRBs) and exhibit more stable and predictable hysteretic behavior than conventional CBFs with high energy dissipation capacity and ductility. The effectiveness of BRBFs has been proven in the technical literature by numerous experimental tests [9][10][11][12][13] and numerical simulations on steel [14][15][16][17][18][19] and concrete [20][21][22] buildings. Nevertheless, it has been widely acknowledged that BRBFs have low post-yield stiffness, and their use may result in significant residual inter-story drifts.…”

Section: Introductionmentioning

confidence: 99%

Life cycle cost‐based optimization framework for seismic design and target safety quantification of dual steel buildings with buckling‐restrained braces

Amiri

Estekanchi

2023

Earthq Engng Struct Dyn

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This study proposes an efficient risk‐targeted framework for integrated optimal seismic design and quantifying target safety of Special Moment‐Resisting Frames (SMRFs) with Buckling‐Restrained Braces (BRBs) in the typical dual steel buildings. This framework provides an automated design procedure formulated as a constrained single‐objective optimization problem to achieve the minimum Life Cycle Cost (LCC) within the Particle Swarm Optimization (PSO) algorithm and can be the basis of current seismic codes for target safety calibration. LCC includes initial construction cost and lifetime seismic losses such as repair cost, repair time, and casualties. FEMA P‐58 methodology is employed for the LCC analysis of the building under possible earthquakes during its lifetime, which is able to take into account potential uncertainties in the hazard‐response‐damage‐loss relationship. An appropriate cost model is developed to estimate the initial and repair cost of the studied BRBs. Minimum requirements of ASCE and AISC codes are considered as design constraints. Nonlinear response history analysis through the Endurance Time (ET) method is utilized to estimate the structural responses versus seismic intensity. Three 4‐, 8‐, and 12‐story steel buildings with dual seismic force‐resisting system consisting of SMRF and BRB (called steel SMRF‐BRB) are selected as the case study. Each building is optimally designed with two approaches: (1) LCC‐based design within the proposed framework and (2) code‐based design to minimize initial construction cost. Comparison of optimized buildings with the two design approaches in terms of structural responses and seismic consequences demonstrates that fulfilling the minimum code requirements at a given seismic hazard level is not sufficient to minimize lifetime seismic losses of steel SMRF‐BRBs. This is because the optimal designs obtained from the code‐based approach are associated with damage concentration, irreparability, and high collapse probability, especially in seismic events more severe than the design level. The proposed LCC‐based approach provides useful information for improving the lifetime seismic performance of steel SMRF‐BRBs.

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Section: Introductionmentioning

confidence: 99%

Life cycle cost‐based optimization framework for seismic design and target safety quantification of dual steel buildings with buckling‐restrained braces

Amiri

Estekanchi

2023

Earthq Engng Struct Dyn

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A Literature Review and Critical Analysis of Metaheuristics Recently Developed

Velasco

Guerrero

Hospitaler

2023

Arch Computat Methods Eng

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Metaheuristic algorithms have applicability in various fields where it is necessary to solve optimization problems. It has been a common practice in this field for several years to propose new algorithms that take inspiration from various natural and physical processes. The exponential increase of new algorithms is a controversial issue that several researchers have criticized. However, their efforts to point out multiple issues involved in these practices have been insufficient since the number of existing metaheuristics continues to increase yearly. To know the current state of this problem, this paper analyzes a sample of 111 recent studies where so-called new, hybrid, or improved optimization algorithms are proposed. Throughout the document, the topics reviewed will be addressed from a general perspective to their specific aspects. Among the study’s findings, it is observed that only 43% of the analyzed papers make some mention of the No Free Lunch (NFL) theorem, being this significant result ignored by most of the studies where new algorithms are presented. Of the analyzed studies, 65% present an improved version of some established algorithm, which reveals that the trend is no longer to propose metaheuristics based on new analogies. Additionally, a compilation of solutions found in engineering problems commonly used to verify the performance of state-of-the-art algorithms is presented. To demonstrate that algorithms with a low level of innovation can be erroneously considered as new frameworks for years, the metaheuristics known as Black Widow Optimization and Coral Reef Optimization are analyzed. The study of its components reveals that they do not have any innovation. Instead, they are just deficient mixtures of different evolutionary operators. This result applies by extension to their recently proposed improved versions.

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Can the global optimum of a combinatorial optimization problem be reliably estimated through extreme value theory?

Velasco

Guerrero

Hospitaler

2022

Swarm and Evolutionary Computation

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Optimal design of the seismic retrofitting of reinforced concrete framed structures using BRBs

Cited by 4 publications

References 49 publications

Life cycle cost‐based optimization framework for seismic design and target safety quantification of dual steel buildings with buckling‐restrained braces

Life cycle cost‐based optimization framework for seismic design and target safety quantification of dual steel buildings with buckling‐restrained braces

A Literature Review and Critical Analysis of Metaheuristics Recently Developed

Can the global optimum of a combinatorial optimization problem be reliably estimated through extreme value theory?

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