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Article
EFFECT OF COMPOSITE ACTION OF CONCRETE SLAB ON UNSYMMETRICAL STEEL PLATE GIRDER UNDER COMBINED BENDING AND TORSION MOMENTS

Authors: Alaa M. A. Al-Khekany --- Haitham H. Muteb
Journal: Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية ISSN: 19984456 Year: 2017 Volume: 10 Issue: 3 Pages: 338-351
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

In general, the reinforced concrete slab in composite unsymmetrical steel plate girder contributes in increased the ultimate strength of composite section under combined effect of bending and torsion moments. The contribution value of slab in composite section is unknown, so this study is adopted. Six specimens were either non-composite or composite reinforced concrete slab and with symmetrical/unsymmetrical steel plate girders were adopted in this study. The specimens were divided into three non-composite steel plate girders and the others were composite with RC slab. The specimens were tested under effect of combined bending and torsion moments.The general behavior and response of the tested specimens were recorded and discussed in this paper. For each tested plate girder, the ultimate strength, load at cracking, failure's mode, and load/deflection relationship at mid-span and under points load were gaged. The experimental results show that the concrete slab contributes in increasing the ultimate load of composite section by a ratio (53.85)% for symmetrical section and (155.63 – 242.51)% for unsymmetrical section when the composite girder under loaded out of supported plane, and the contribution value of concrete slab in composite plate girder increased in unsymmetrical section than symmetrical section this is due to the ideal use of materials.


Article
BEHAVIOR OF COMPOSITE ULTRA HIGH PERFORMANCE CONCRETE-STEEL BEAMS (EXPERIMENTAL AND FINITE ELEMENT ANALYSIS STUDIES)
سلوك العتبات المركبة من عتبة فولاذية وبلاطة خرسانية عالية الأداء (دراسات عملية وتحليل العناصر المحددة)

Authors: Haitham H. Muteb --- Zainab M. R. Abdul Rasoul
Journal: journal of kerbala university مجلة جامعة كربلاء ISSN: 18130410 Year: 2016 Volume: 14 Issue: 2 Pages: 171-185
Publisher: Kerbala University جامعة كربلاء

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Abstract

The structural behavior of composite ultra-high performance concrete steel beam under static load had been investigated in this paper. The study was conducted by both experimental and theoretical parts. In the experimental part, seven composite beams were tested. These beams were divided into two groups depending on variable parameters, the first group contained four beams, one of them was the control beam, that designed to represent partial interaction and the other beams contained various number of shear connectors, the second group contained three beams depended on the different distribution of shear connectors; in shear zone only. In the theoretical part, the tested beams were numerically modeled, and then analyzed using the finite elements method. The numerical models were carried out in three dimensions by software package (ANSYS 12.1, 2009).The main concluded remarks obtained in this paper that; the ultimate load increased with increasing the shear connectors, and the measured end slip value, decreased when the degree of partial shear connection increased from 41.6% to 58.3% to 83.3% up to 100%. In addition to that, the results of the finite element analysis showed good agreement with the results of the experimental tests.

إن الهدف من هذا البحث هو تقصي السلوك الإنشائي للمنشآت المركبة ذات الخرسانة عالية الأداء تحت تأثير الأحمال الساكنة. ولهذا الغرض فإن الدراسة أجريت من خلال كلا الجانبين العملي والنظري .تضمن الجانب العملي من البحث فحص سبع عتبات مركبة. وقد تضمن هذا الجزء تقسيم العتبات المركبة ضمن مجموعتين , المجموعة الأولى تضمنت أربع عتبات مركبة من ضمنها نموذج المقارنة والذي صمم ليكون ذا ارتباط جزئي, والعتبات الثلاثة الباقية من اجل دراسة التغير في عدد روابط القص, والمجموعة الثانية تكونت من ثلاث عتبات مركبة من اجل دراسة تأثير توزيع روابط القص في منطقة القص فقط. وفي الجانب النظري من الدراسة تم تمثيل وتحليل النماذج بشكل رقمي باستخدام طريقة العناصر المحددة وتكوين النماذج الرقمية ثلاثية الأبعاد باستخدام برنامج الكتروني (ANSYS 12.1, 2009).من الاستنتاجات الرئيسة التي تم التوصل إليها في هذا البحث , زيادة في حمل الفشل مع زيادة عدد روابط القص .و نقصان في قيمة زحف الربط عند زيادة درجة الربط بين البلاطة الخرسانية والمقطع الحديدي من 41.6% إلى 58.3% الى83.3% إلى 100%. بالإضافة إلى ذلك أظهرت نتائج التحليل الرقمي تطابق جيد مع النتائج العملية.

Keywords


Article
Structural Behavior of Composite Castellated Steel Concrete Beams Subjected to Impact Load

Authors: Shereen Q. Abdulridha --- Haitham H. Muteb --- Sarmad Sh. Abdulqader
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2018 Volume: 26 Issue: 8 Pages: 1-12
Publisher: Babylon University جامعة بابل

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Abstract

The structural behavior of composite castellated steel concrete beams subjected to impact load presented in this study. In which fabrication of composite castellated steel self-compacting concrete beams which connected to self-compacting concrete by means of stud shear connectors. Four composite castellated beams were performed with different degrees of castellation, they were 0%, 25%, 33.8% and 50%. These specimens were subjected to an impact load produced from free falling of steel ball. The experiments required fabrication of special rig which connected with different sensors and programmed by Lab VIEW 2016 program. Different parameters were recorded and discussed which involved force-time history and displacement history for the tested beams. It is founded that the increase of the degrees of castellation for the adoptedspecimens will increase the maximum impact load by about 16.13%, compared with non-castellated composite specimen. The amplitudes of vibration represented by displacement have decreased with the increasing of degrees of castellation by about 3.51%, 14.04% and 20.18% for the degrees of castellation 25%, 33.8%, and 50% respectively.

تشملالدراسةالحالية تصنيعالعتباتالمعرشةالتيترتبطبالخرسانةذاتيةالانصهاربواسطةوصلاتربطلدراسةسلوكهاتحتتأثيرالاحمال الصدمية. تمتنفيذأربعةعتباتمركبةومعرشةبدرجاتمختلفةمنالتعريش هي 0% و25٪ و33,8٪ و50٪. تعرضتهذهالعيناتلحملالصدمةالناتجةعنالسقوطالحرللكرةالفولاذية.تطلب اجراء الفحوصات المختبرية تصنيع جهاز خاص تم توصيله بمتحسسات مختلفة وتمت عملية برمجتها باستخدام برنامج Lab VIEW 2016.تمتسجيلومناقشةمعاملاتمختلفةوالتيتضمنتمخطط القوةمع الزمن ومخطط الانحراف مع الزمن للحزمالتيتماختبارها.زادالحدالأقصىللحمل الصدميمعزيادةدرجاتالتعريشالتيتمتبنيهابنسبة 16,13٪ تقريبًا. وقدانخفضتسعةالاهتزازالمتمثلةفيالانحرافمعزيادةدرجاتالتعريشبنسبة 3,51٪ و14,04٪ و20,18٪ لدرجاتالتعريش 25% و33,8% و50% على التوالي.


Article
Behavior of High-Rise Steel Building With The Inclusion of Warping
سلوك البناية الفولاذية العالية مع إدراج َتشويه

Authors: Najla'a H. Shareef --- Haitham H.Muteb --- Hisham M. AL-Hassani
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2010 Volume: 28 Issue: 22 Pages: 6580-6601
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The mathematical procedure in this study covers the calculation of sectorialproperties of the equivalent cross-sectional storey for high-rise building frames. Theformulation is efficiently used to obtain the free vibration analysis of high-risebuildings which are constructed from several columns, beams, shear walls andbracing etc. the analysis is based on transformation the complex system to a simpletall column to represent a cantilevered tall building structure. This is partitioned tonodes one of which indicates a storey with equivalent cross-sectional properties forall storeys' elements after calculation of these properties with respect to the shearcenter of high-rise building. A thin walled bar finite element with seven degrees offreedom at each node is assumed. A new formulation of the stiffness and consistentmass matrices of the thin- walled element is presented in this study. The effect ofcross sectional warping and its properties on the flexural, torsional and axialproperties was investigated, using discrete element approach in idealizing thestructure in high rise building. For the purpose of the present study, it is assumedthat the cross-sectional types under condition are only of thin-walled sections.Algorithm method was developed which covers the calculation of sectorialproperties of the cross section for floor plan in high-rise building, to study the shareof columns for lateral shear force resistance, and investigate the behavior of differenttypes of high-rise building with inclusion of warping restraint. The effect of naturalfrequency with height of tall buildings, and the mode shape for different crosssectionalplans of high-rise building was studied. To check the efficiency andaccuracy, the mathematical procedure is demonstrated for static and dynamicexamples by comparing the results with those obtained by using software ANSYSprogram. A difference of 15% is shown. An eigen value problem is analyzed andnumerical examples are discussed.

(sectorial properties) في ھذه الدراسة ت م الحص ول عل ى إج راء ریاض ي لاحتس اب الخ واص القطاعی ةلخواص المقطع المكافئ لھیاكل طوابق الأبنیة العالیة. الصیاغة استعملت بشكل كفوء للحصول على الاھتزازوتحوی ل الأبنی ة العالی ة المكون ة م ن العدی د م ن الأعم دة والأعت اب و ج دران ق ص (free vibration) الح رونظم إسناد إلى عمود طویل مؤلف من مجموعة من العقد وكل عقدة تمثل طابق لھ مواص فات مكافئ ة لجمی عخ واص أعض اء الط ابق بع دما ت م حس اب ھ ذه الخ واص بالنس بة إل ى مرك ز الق ص للبنای ة. ت م ف رضعنص رللعنص ر المح دد م ع اعتب ار درج ة حری ة س ابعة ف ي ك ل عق دة. (thin-wall element) الج دار الرقی قوت أثیره عل ى الخ واصالانثنائی ة ، الل ي و المحوری ة ت م (Warping) ولأغراض دراس ة تش وه الل ي الط وليللأبنی ة العالی ة . ولأغ راض الدراس ة (Direct element approach) اعتماد نظام التمثیل المنفصل الممیزالحالیة، تم فرضالمقاطع تحت شرط رقیقة الجدران. ت م تط ویر خوارزمی ة للحص ول عل ى خ واص المق اطعللطابق الواحد في الأبنیة العالیة و كذلك دراسة حصة العمود الواحد من قوى القص الجانبیة وتحلی ل س لوكیةأنواع مختلفة من الأبنیة العالیة مع التقیید الضمني لتشوه الل ي الط ولي وأیض ا دراس ة أش كال أنم اط الاھت زازللأبنیة العالیة ذات المقاطع المختلفة. و لت دقیق كف اءة الإج راء الریاض ي وإظھ ار ص حتھ ف ي التحلی ل الس اكنحیث أظھرت اختلافات لا تتجاوز 15 %. ت م عم ل تحل یلا (ANSYS) والدینامیكي قورنت النتائج مع برنامجللقیم الممیزة وتم مناقشة أمثلة عددیة.


Article
EXPERIMENTAL INVESTIGATION FOR IMPROVING

Author: Dr. Haitham H. Muteb Mr. Amir T. Kemal Mrs. Muna H. Jaber
Journal: Iraqi journal of mechanical and material engineering المجلة العراقية للهندسة الميكانيكية وهندسة المواد ISSN: 20761819 Year: 2009 Volume: D Issue: first conf./ eng. coll. Pages: 623-634
Publisher: Babylon University جامعة بابل

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Abstract

The use of carbon fiber reinforced plastic (CFRP) strips to enhance the behavior oflocal stability for thin-walled tubular steel columns has been investigatedexperimentally. Tubular steel columns specimens are made from welding thin plates attheir edges. The type of strengthen carbon fiber is a unidirectional woven fiber mat ofmid strength which is a product of Sika coded as SikaWrap -230C. The CFRP is fixed using a resin Sikadure-330. The study is focusing on the local stability of such members. Many pattern of wrapping are suggested herein. Recommendations havebeen drawn for the best pattern chosen to obtain the most efficient and economicstrengthen pattern.

Keywords

Thin-walled --- CFRP --- Tubular Steel --- Axial Load

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