تأثیر توزیع بازشو بر رفتار سازه‌ای ساختمان‌های بلندمرتبه بتن‌آرمه دارای سیستم شبکه خارجی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی عمران، دانشکده فنی و حرفه ای پسران سمنان

2 دانشگاه سمنان

10.22124/jcr.2021.18787.1480

چکیده

در ساختمان‌های بلندمرتبه بتنی، سیستم سازه‌ای شبکه خارجی از یک پوسته بتن‌آرمه تشکیل شده است، که این پوسته دارای تعداد زیادی بازشو و مقاوم در برابر بارهای ثقلی و جانبی است. در این مقاله به مطالعه تأثیر توزیع بازشو در شبکه خارجی ساختمان‌های بلند بتن‌آرمه پرداخته می‌شود. برای این منظور سازه‌های بلندمرتبه بتن‌آرمه 20، 30 و 40 طبقه با شبکه خارجی و در سه حالت مختلف قرارگیری بازشو در شبکه خارجی در نظر گرفته می‌شوند. در مدل 1 (مدل مبنا)، بازشوها به صورت منظم در شبکه خارجی ساختمان توزیع می‌شوند؛ اما در مدل 2، بازشوها در قسمت‌های میانی وجوه شبکه و در مدل 3، بازشوها در گوشه‌های پوسته متمرکز می‌شوند. پارامترهای انتخابی جهت تخمین محل بهینه بازشو در شبکه خارجی ساختمان‌های بلندمرتبه بتن‌آرمه عبارتند از تغییرمکان جانبی طبقه و شاخص دریفت هر طبقه. همچنین به منظور تعیین محل بهینه قطع هسته مرکزی، درصد جذب برش و ممان ناشی از نیروی زلزله بین هسته مرکزی و شبکه خارجی مورد بررسی قرار می‌گیرد. نتایج نشان داد که در ساختمان‌های با نسبت وجوه پایین، بهترین حالت قرارگیری بازشو، توزیع منظم بازشوها در شبکه خارجی بوده، اما در ساختمان‌های با نسبت وجوه بالاتر، بهترین محل قرارگیری بازشو، در قسمت‌های میانی شبکه خارجی است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The Effect of Opening Distribution on the Structural Behavior of High-Rise Reinforced Concrete Buildings with External Grid System

نویسندگان [English]

  • Sima Aramesh 1
  • Ali Kheyroddin 2
1 Department of Civil Engineering, Faculty of Semnan, Technical and Vocational University (TVU), Semnan, Iran
2 Department of Civil Engineering, Semnan University, Semnan, Iran
چکیده [English]

In high-rise concrete buildings, the external grid consists of a reinforced concrete shell, which has a large number of openings and is resistant to gravity and lateral loads. In this paper, the effect of opening distribution on reinforced concrete external grid is studied. For this purpose, high-rise reinforced concrete structures of 20, 30, 40 and 50 floors with external grid and in three different modes of opening in the external grid are considered. In model 1 (base model), the openings are regularly distributed in the external grid of the building, but in Model 2, the openings are concentrated in the middle of the grid funds and in Model 3, the openings are concentrated in the corners of the external grid. Selective parameters for estimating the optimal opening location in the external grid of high-rise reinforced concrete buildings are the lateral displacement of the floor and the drift index of each floor. Also, in order to determine the optimal location of the core, the percentage of shear absorption and moment due to the seismic force between the core and the external grid is investigated. The results showed that in buildings with low aspect ratio, the best position of the opening is the regular distribution of openings in the external grid, but in buildings with higher aspect ratio, the best location of the opening is in the middle parts of the external grid.

کلیدواژه‌ها [English]

  • High-rise building
  • Reinforced concrete
  • Distribution of opening
  • External grid
  • Drift index

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