Оптимизация швеллерных и двутавровых гнутозамкнутых профилей с перфорированными стенками
- Авторы: Марутян А.С.1
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Учреждения:
- Пятигорский институт (филиал) Северо-Кавказского федерального университета
- Выпуск: Том 18, № 2 (2022)
- Страницы: 111-139
- Раздел: Расчет и проектирование строительных конструкций
- URL: https://journals.rcsi.science/1815-5235/article/view/325796
- DOI: https://doi.org/10.22363/1815-5235-2022-18-2-111-139
- ID: 325796
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Аннотация
В представленном исследовании продолжается оптимизация швеллерных и двутавровых гнутозамкнутых профилей (ГЗП) с трубчатыми полками и перфорированными стенками из листового проката как равных, так и разных толщин. Такие профили предназначены для легких стальных тонкостенных конструкций (ЛСТК), отличающихся улучшенными технико-экономическими показателями и массовым спросом в промышленно-гражданском строительстве, что подтверждает актуальность их дальнейшей проработки. Цель исследования - показать, что характеристики ЛСТК можно дополнительно улучшить при помощи формообразования профилей, сочетающего в составном сечении прямые и круглые очертания замкнутых и открытых контуров, включая их перфорирование. Посредством опытно-конструкторских проработок, решения оптимизационных задач и вариантного проектирования ГЗП уточнены их расчетные сечения с максимальным запасом прочности на изгиб при минимальной массе. Оригинальность технических решений подтверждена патентной экспертизой. Швеллерный ГЗП обладает экстремальными массой и прочностью при относительной высоте вырезов в стенке 1/1,87 и отношении размеров ширины и высоты 1/4,32. Когда толщина полок в 2 раза больше толщины стенки, прочность и масса двутаврового ГЗП экстремальны при относительной высоте вырезов 1/1,23 и отношении размеров 1/4,17, а когда толщина полок составляет 0,6 толщины стенки, прочность и масса ГЗП экстремальны при высоте вырезов 1/1,73 и отношении размеров 1/5,22. Если толщины полок и стенки равны, то прочность и масса ГЗП экстремальна при высоте вырезов 1/1,46 и отношении размеров 1/3,17.
Об авторах
Александр Суренович Марутян
Пятигорский институт (филиал) Северо-Кавказского федерального университета
Автор, ответственный за переписку.
Email: al_marut@mail.ru
ORCID iD: 0000-0001-5464-5929
кандидат технических наук, доцент, преподаватель, ведущий научный сотрудник
Российская Федерация, 357500, Пятигорск, пр-кт 40 лет Октября, д. 56Список литературы
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