مهندسی سازه و ساخت

مهندسی سازه و ساخت

بررسی آزمایشگاهی مقاومت برش دوطرفه در دال تخت بتن آرمه متصل به ستون فولادی

نوع مقاله : علمی - پژوهشی

نویسندگان
1 دانشجوی دکترا، دانشکده عمران، دانشگاه یزد، یزد، ایران
2 دانشیار، دانشکده عمران، دانشگاه یزد، یزد، ایران
چکیده
دال‌های تخت بتن‌آرمه که توسط ستون‌های فولادی پشتیبانی می‌شوند، یکی از سیستم‌های سازه‌ای پرکاربرد در صنعت ساختمان محسوب می‌شوند و به دلیل مزایای متعدد، توجه مهندسان و متخصصان را در سراسر جهان به خود جلب کرده‌اند. بااین‌حال، اتصال بین دال و ستون‌ها همچنان یک موضوع بحث‌برانگیز است، زیرا نبود یکپارچگی کافی در این اتصال، نگرانی‌هایی را در مورد استفاده گسترده از این سیستم ایجاد کرده است. . علاوه بر این، پس از فروریزش اخیر برج متروپل در آبادان، ایران، و عدم وجود دستورالعمل‌های مشخص برای چنین سازه‌هایی در آیین‌نامه‌ها، نیاز به مطالعات عمیق‌تر در این حوزه افزایش یافته است. این پژوهش، مقاومت برش دو‌طرفه در اتصال دال تخت بتنی به ستون فولادی داخلی توسط کلید برشی و بدون آرماتور برشی را بررسی می‌کند. برای ارزیابی تأثیر آرماتور طولی دال و همچنین اثر تغییر در نوع پروفیل اتصال (نبشی یا ناودانی) بین ستون و دال، چهار نمونه دال تا رسیدن به شکست برشی دوطرفه مورد آزمایش قرار گرفتند. در این آزمایش‌ها، بار ثقلی از پایین به نمونه‌ها اعمال شد تا شکست برشی مشابه دال واقعی مشاهده گردد. نتایج نشان داد که افزایش درصد آرماتور طولی می‌تواند ظرفیت برش دو‌طرفه را به‌طور قابل‌توجهی افزایش دهد، درحالی‌که در مورد تغییر نوع پروفیل اتصال نمی توان اظهار نظرقطعی نمود.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Experimental Investigation on Punching Shear Resistance of reinforced concrete flat Slabs Connected to Steel Columns

نویسندگان English

niloofar asadollahzadeh 1
Reza Morshed 2
abolfazl Eslami 2
1 PhD Candidate, Civil Engineering Department, Yazd University, Yazd, Iran.
2 Associate Professor, Civil Engineering Department, Yazd University, Yazd, Iran
چکیده English

Reinforced concrete flat slabs supported by steel columns are a widely used structural system in the construction industry, attracting increasing attention from engineers and experts worldwide due to their numerous advantages. The connection between the slab and columns, however, remains a controversial topic, as the lack of integration in this connection has raised concerns about the widespread use of this system. Moreover, following the recent Metropol Tower collapse in Abadan, Iran, and the absence of clear guidelines for such structures in codes, the need for more in-depth studies in this area has significantly increased. This study investigates the punching shear resistance at the connection between a reinforced concrete flat slab and an interior steel column, using a shear key and without shear reinforcement. To evaluate the effect of longitudinal reinforcement, as well as the impact of connection method between the column and slab using different type of profiles, four specimens were tested similar to real structural loading conditions inwhich the gravity load was applied to specimens from bottom to simulate the real condition. The results showed that increasing the percentage of longitudinal reinforcement can considerably enhance the punching shear capacity, while no definitive conclusion could be made regarding the effect of changing the connection profile type.

کلیدواژه‌ها English

Punching shear
Slab-column connection
Hybrid structure
Reinforced concrete flat slabs
Shear key
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  • تاریخ دریافت 13 اسفند 1403
  • تاریخ بازنگری 01 اردیبهشت 1404
  • تاریخ پذیرش 13 اردیبهشت 1404