Evolutionary optimization of reinforced concrete beams, taking into account design reliability, safety and risks during the emergency loss of supports

Tamrazyan, Ashot; Alekseytsev, Anatoly

doi:10.1051/e3sconf/20199704005

Cited by 38 publications

(6 citation statements)

References 16 publications

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“…For design case number 1, the deflection in the middle of the beam span is equal: The analysis of the table shows that the choice of approach to calculating the stiffness of reinforced concrete beams can significantly affect both the safety of the design solution and its performance. The corrosion phenomenon requires further, first of all, experimental study for effective use both in numerical modeling of failures due to force actions [12][13][14], mechanically damaged systems [15][16], and in searching for safe and effective solutions based on optimization. For example, it is reasonable to develop a corrosion accounting mechanism in schemes based on genetic search algorithms [17][18][19], as well as in classical probabilistic methods based on reliability theory [20].…”

Section: Results and Problemsmentioning

confidence: 99%

Analytical Model for Assessment of Deflections of Corrosion-Damaged Reinforced Concrete Beams

Alekseytsev

Kurchenko

2022

Advances in Transdisciplinary Engineering

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Alternative approaches to the estimation of corrosion-damaged beams stiffness with regard for localization of corrosion focus and distribution of corrosion damages in concrete on the basis of layered model are considered. The following methods of determining displacements in corrosion-damaged reinforced concrete beams of rectangular cross-section have been considered. In the first one, the stiffness of the beam in determining the deflection is considered constant. In this case, the corrosion-damaged deflections values may be underestimated due to failure to take into account the actual work of reinforced concrete. In the second, the deflection is calculated considering the height of the concrete compression zone that varies along the length of the beam. For these approaches, stiffness reduction in the beam sections in the presence of corrosion damage to the concrete of the compressed zone is modeled. It is shown that in the presence of corrosion damage, the deflections of the structure can significantly increase, which requires mandatory consideration in the life cycle of load-bearing structures of structures when assessing their mechanical safety. The necessity of obligatory registration of corrosion damages in the implementation of algorithms of optimal design of reinforced concrete structures has been revealed.

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Section: Results and Problemsmentioning

confidence: 99%

Analytical Model for Assessment of Deflections of Corrosion-Damaged Reinforced Concrete Beams

Alekseytsev

Kurchenko

2022

Advances in Transdisciplinary Engineering

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“…In accordance with the above interpretation of survivability of a building, the following logical operations are proposed [41]:…”

Section: Criterial Assessment Of Resistance To Progressive Collapse A...mentioning

confidence: 99%

Ensuring the Safety of Steel Moment Frames Subjected to Uncertain Impacts

Alekseytsev

2023

Buildings

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The article addresses the problem of safety evaluation of steel moment frames of civil buildings, e.g., warehouses, shops, garages, and multistory industrial buildings on deformable soil in the relevant case of an emergency impact. The case of accidental emergency impacts is considered when such parameters as the point, direction, and intensity of an impact cannot be predetermined. Such impacts are not expected to trigger the progressive collapse of currently implemented design solutions and the whole structure must maintain the property of survivability. To evaluate this property, several calculations are to be made in the quasi-static statement to identify the stress–strain state under the most dangerous accidental impacts. Further, final calculations are to be made in the dynamic statement. In this case, the problem of search is solved using the criterion of minimizing the integral safety margin of structural elements in a steel moment frame design. Calculations prevent the frame stability loss. The calculation is performed in the quasi-static statement using models made in compliance with the deformation theory of plasticity, while the calculation in the dynamic statement takes into account the associated plastic flow rule. The proposed procedures allow for designing steel moment frames that are resistant to accidental emergency impacts. Impact loading is analysed as pulse loading, which is statically equivalent to the dynamic effect of an inelastic impact of a stiff body on a structural system. The design and the efficiency evaluation of a steel moment frame of a two-story building are considered.

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“…Sedangkan pengembangan algoritme untuk mengoptimalkan balok beton dapat menggunakan pendekatan Reliability Based Design Optimization (RBDO) [7].…”

Section: Pendahuluanunclassified

Optimasi Desain Balok dan Kolom Gedung Twin Tower Makassar dengan Menggunakan Microsoft Excel VBA terhadap Sisi Kekuatan Lentur, Geser, dan Biaya

Wisman¹,

Tavio²,

Iranata³

2022

JTITS

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Makassar merupakan kota terbesar keempat di Indonesia dan juga merupakan Ibu kota Sulawesi Selatan sehingga mendorong pemerintah untuk menghadirkan fasilitas untuk menunjang kegiatan masyarakat, salah satunya adalah pembangunan infrastruktur. Karena lahan yang semakin sempit, dipilihlah bangunan secara vertikal yang dinilai lebih efektif dan efisien dengan kondisi eksisting yang ada. Twin Tower Makassar merupakan salah satu gedung tinggi dengan 36 lantai dan tinggi 170,95 m yang terletak di Makassar. Gedung ini dibangun di kawasan Center Point of Indonesia dan akan menjadi gedung pemerintahan Sulawesi Selatan. Menara ini akan menyatukan kantor-kantor pemerintahan Sulawesi Selatan dan juga menjadi bentuk sinergitas, solidaritas serta kolaborasi antara perangkat pemerintah sehingga diharapkan dapat membangun Sulawesi Selatan dengan efisien. Twin Tower juga akan dilengkapi dengan pusat bisnis dan jasa, serta fasilitas publik seperti mall, hotel, dan restoran. Pentingnya optimasi elemen struktur utama yaitu balok dan kolom adalah untuk mengurangi biaya pembangunan dan mengoptimalkan penggunaan bahan bangunan. Optimasi dilakukan dengan bantuan program sederhana dari Microsoft Excel yaitu Visual Basic Analysis (VBA). Pelaksanaan proses optimasi dilakukan dengan VBA karena proses optimasi dapat dilakukan secara otomatis hanya dengan memasukan syarat serta rumus-rumus sesuai peraturan saja sehingga dapat memudahkan proses penentuan dimensi sampai ke kebutuhan tulangan dari elemen struktur gedung. Pada tugas akhir ini dilakukan optimasi untuk elemen struktur balok dan kolom gedung Twin Tower Makassar menggunakan Microsoft Excel Visual Basic Analysis (VBA).Dari hasil analisa yang telah dilakukan didapatkan bahwa balok dapat menjadi lebih efisien dari sisi lentur dan gesernya dengan pengurangan harga hingga 31% dan kolom dapat menjadi lebih efisien dari sisi lentur dan gesernya dengan pengurangan harga hingga 57%.

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Evolutionary optimization of reinforced concrete beams, taking into account design reliability, safety and risks during the emergency loss of supports

Cited by 38 publications

References 16 publications

Analytical Model for Assessment of Deflections of Corrosion-Damaged Reinforced Concrete Beams

Analytical Model for Assessment of Deflections of Corrosion-Damaged Reinforced Concrete Beams

Ensuring the Safety of Steel Moment Frames Subjected to Uncertain Impacts

Optimasi Desain Balok dan Kolom Gedung Twin Tower Makassar dengan Menggunakan Microsoft Excel VBA terhadap Sisi Kekuatan Lentur, Geser, dan Biaya

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