مقاله انگلیسی رایگان در مورد عملکرد ساختاری تاوه های صاف RC – الزویر ۲۰۱۶

elsevier

 

مشخصات مقاله
ترجمه عنوان مقاله عملکرد ساختاری تاوه های صاف RC در اتصال به ستون های فولادی با کلاهک های برشی
عنوان انگلیسی مقاله Structural performance of RC flat slabs connected to steel columns with shear heads
انتشار مقاله سال ۲۰۱۶
تعداد صفحات مقاله انگلیسی  ۲۳ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله
مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
۳٫۱۶۷ در سال ۲۰۱۷
شاخص H_index ۱۰۴ در سال ۲۰۱۹
شاخص SJR ۱٫۶۹۰ در سال ۲۰۱۹
شناسه ISSN ۰۱۴۱-۰۲۹۶
شاخص Quartile (چارک) Q1 در سال ۲۰۱۹
رشته های مرتبط  مهندسی عمران
گرایش های مرتبط  سازه
نوع ارائه مقاله
ژورنال
مجله / کنفرانس Engineering Structures
دانشگاه Department of Civil and Environmental Engineering, Imperial College London, UK
کلمات کلیدی تاوه های صاف بتنی تقویت شده، ترکیب های بتن / فولاد ترکیبی، کلاهک های برشی کاملا یکپارچه، پاسخ چرخشی تاوه، رفتار نهایی تاوه، برش منگنه ای، تقویت های برشی پرچی
کلمات کلیدی انگلیسی Reinforced concrete flat slabs, Hybrid steel/concrete assemblages, Fully-integrated shear-heads, Rotational slab response, Ultimate slab behaviour, Punching shear, Stud shear reinforcement
شناسه دیجیتال – doi
https://doi.org/10.1016/j.engstruct.2016.03.022
کد محصول E11913
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فهرست مطالب مقاله:
Outline
Highlights
Abstract
Keywords
Nomenclature
۱٫ Introduction
۲٫ Experimental programme
۳٫ Test results and observations
۴٫ Load–rotation response
۵٫ Punching shear strength
۶٫ Concluding remarks
Acknowledgements
References

بخشی از متن مقاله:

Abstract

This paper investigates the structural performance of hybrid members consisting of reinforced concrete flat slabs, with and without shear reinforcement, connected to steel columns by means of fully integrated shear-heads. A detailed account of the results from a series of six large scale tests on this form of hybrid structural system is provided. The test results offer a direct evaluation of the full load–deformation behaviour of the specimens as well as the ultimate punching shear strength attained prior to failure at the critical slab perimeter outside the shear-head region. The experimental findings enable the development of analytical models that depict the rotational response and flexural strength as a function of the shear-head embedment length, layout and section size. Additionally, the test results support the definition of a shear-head dependent control perimeter which is used in conjunction with the analytical slab models for full assessment of punching shear strength. The adequacy of strength predictions incorporated in current design methods for conventional reinforced concrete members are also examined in the paper. It is shown that existing design procedures either lack direct guidance for members provided with shear-heads, or lead to overly conservative strength predictions. Finally, in order to provide a reliable evaluation of the ultimate punching shear strength of hybrid elements, analytical design expressions which account for the characteristics of the shear-head system, are proposed. In comparison with conventional reinforced concrete design provisions, the suggested approach captures in a more realistic manner the influence of the embedded length of the shear-heads for such hybrid members with or without shear reinforcement.

Introduction

Hybrid systems consisting of steel columns with shear heads and reinforced concrete (RC) flat slabs have the potential for combining the structural behaviour synergies and practical construction merits of the constituent elements. Early interest in shear head configurations was shown with the development of high rise structures in the United States when the first systems to transfer loads between concrete columns and flat slabs were patented [1,2]. The use of shear-head systems against punching shear in conventional RC flat slabs was subsequently reported in various studies. Corley and Hawkins proposed a design procedure (implemented by the American Concrete Institute, ACI) as a result of a series of tests on cruciform shear-head systems fully embedded in the slab and consisting of two perpendicular I-sections placed between longitudinal reinforcement mats [3]. It was noted that shear-heads can increase the punching shear strength of RC flat slabs by up to 75%. Other intricate shear-head systems were reported in recent decades for RC flat slabs, including composite cruciform systems consisting of vertical plates acting as shearheads and provided with welded studs [4], fan-shaped systems made of wide tee pieces [5], and the Geilinger mushroom-head made of vertical plates bolted to the flanges of the column and surrounded by U-shaped edge beams [6]. Chana and Birjandi also carried out an extensive testing programme on typical cruciform systems having various arrangements of steel beams, including a closed-type system provided with edge beams [7].

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