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    INVESTIGATION OF THE BEHAVIOR OF BEAM-COLUMN JOINTS (BCJS) REINFORCED WITH SHAPE MEMORY ALLOYS (SMAS)

    INVESTIGATION OF THE BEHAVIOR OF BEAM-COLUMN JOINTS (BCJS) REINFORCED WITH SHAPE MEMORY ALLOYS (SMAS). Masters thesis, King Fahd University of Petroleum and Minerals.

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    Arabic Abstract

    المباني الخرسانيه المسلحه المقاومه للقوى والاحمال الجانبيه كأحمال الرياح والزلازل تتكون من اطارات خاصه مقاومه للعزوم (SMRF) . هذه المباني تتعرض لتشوهات كبيره نتيجة تعرضها للاحمال والقوى الزلزاليه وخصوصا في مناطق الالتقاء بين الجسور والأعمده (BCJ). فإذا امكن تصميم مناطق الالتقاء (BCJ) بحيث يصبح عندها القدره على استرجاع مقاومتها وحالتها الاصليه بعد تعرضها للقوى الزلزاليه ، العديد من المشاكل المتعلقه بانهيارات المباني والمنشئات اثناء وقوع الزلازل سوف يتم تجنبها وبالتالي سيتم الحفاظ على الارواح والممتلكات. لذلك ، فإن الهدف من هذا البحث هو تصميم وانشاء مناطق الالتقاء (BCJ) بحيث تستطيع تحمل تشوهات كبيره ثم يكون لها القدره على الرجوع الى حالتها الاصليه بعد حصول الزلزال. ولكي يتم تصميم وانشاء مثل هذا النوع من مناطق الالتقاء (BCJ) سيتم استخدام ماده تذكر الشكل والتي تُعرف بإسم (SMA) والتي تستطيع من خلال مواصفاتها الخاصه ان تعود الى وضعها الاصلي بعد تعرضها لتشوهات كبيره. في هذا البحث سيتم دراسة واستكشاف سلوك مناطق الالتقاء (BCJ) والتي يتم تسليحها بقضبان مادة (SMA) في مناطق المفاصل اللدنه والتي تُعرف بإسم (Plastic Hinges) تحت تأثير الاحمال والتشوهات المتناوبه (Cyclic and Reverse Cyclic Loads). هذه الدراسه سوف تشمل دراسة الخصائص الأساسيه والهندسيه لمادة (SMA) وكذلك العوامل والتأثيرات المختلفه لهذه الماده. بالإضافه الى ذلك سوف يتم دراسة سلوك مناطق الالتقاء (BCJ) والتي يتم تسليحها باستخدام حديد التسليح الاعتيادي (Steel Reinforcement) وكذلك المسلحه بقضبان تذكر الشكل (SMA) باستخدام طريقة العناصر المحدده (Finite Element Method) في برنامج التحليل العددي (ANSYS) .

    English Abstract

    Reinforced concrete structures consisting of moment resisting frames have been used generally as resisting systems for lateral loads. These structures are usually sustained devastation resulting from seismic and earthquakes, including collapse and damage where (BCJs) is specified as the weakest zone in the structural systems. If beam-column joints have the ability to retrieve their predetermined strength and shape after a seismic occurred, then many problems, which related to collapse and permanent damage, might be solved. Consequently, the purpose of the study is to predict intelligent BCJs that can experience to greater deformations yet retrieval potentially its predetermined structural integrity after seismic has occurred. Shape Memory Alloys (SMAs) material has the ability to construct of such intelligent reinforced concrete beam-column joints. SMAs have a relatively smaller hysteretic loop and lower modulus of elasticity comparing to reinforcement, also have high resistance to fire and corrosion. Therefore, using SMAs for strengthening of RC- BCJs may enhance and restore ductility of the joints under different types of loading, making it very practical for the strengthening of RC structures. This research proposal main objective is for Investigation the behavior of (BCJs) Reinforced with Shape Memory Alloys (SMAs). This investigation will initially show the factors influencing SMAs engineering characteristics, constitutive material models, and the fundamental properties. Furthermore, the investigation will focus on the behavior of BCJs under reverse cyclic and cyclic loading reinforced with super elastic SMAs. Numerical simulation models of BCJ with and without SMAs will also be conducted by using suitable nonlinear finite element analysis software, which will help to interpret the monitored behavior of BCJs through comparison with the numerical simulation. This work is done under the Deanship of Scientific Research (DSR) project number (IN121058). The main aim of this work is studying the behavior (BCJ) reinforced with shape memory alloy bars at critical section. All the specimens were prepared and cast at PRAINSA Company then they were conducted and tested in the KFUPM structural lab. Results from experimental tests have been used for the verification of Finite Element simulation of (BCJ).

    Item Type: Thesis (Masters)
    Subjects: Civil Engineering > Structural Engineering
    Department: College of Design and Built Environment > Civil and Environmental Engineering
    Committee Advisor: Al-Gadhib, Ali H.
    Committee Co-Advisor: K. Rahman, Muhammad
    Committee Members: Baluch, Mohammed H. and M. Sharif, Al Farabi and Al-Osta, Mohammed A.
    Depositing User: MOHAMMED ABDULKAREM AL-HURI (g201304170)
    Date Deposited: 07 Jun 2016 09:32
    Last Modified: 01 Nov 2019 16:34
    URI: http://eprints.kfupm.edu.sa/id/eprint/139973