bluuebunny/crossref_metadata_2025 huggingface dataset:
Üçüncü Yaş Turizmine Yönelik Algı Ölçeği Geliştirme Çalışması
Authors: KARACA Şükran , ÖZKAN ÖNEM Esra , YILDIZ Muhammed
Published: December 2022

Amaç: Çalışmanın temel amacı, üçüncü yaş turizmine yönelik beşli likert tipi bir algı ölçeği geliştirmektir.

Yöntem: Geliştirilmesi planlanan ölçek için ilk olarak alanyazın taraması yapılmış ve daha sonra uzman görüşüne başvurularak 30 maddelik bir ölçek formu oluşturulmuştur. Türkiye’de yaşayan 65 yaş ve üzeri 314 kişiden çevrimiçi anket tekniği ile veriler elde edilmiştir. Katılımcılardan elde edilen veriler SPSS ve AMOS programları aracılığıyla analize tabi tutulmuştur. Açımlayıcı ve doğrulayıcı faktör analizleri, güvenilirlik ve geçerlilik analizleri yapılmıştır.

Bulgular: Açımlayıcı faktör analizi sonucunda faktör yükleri 0.45’in altında kalan ve çift yükleme yapılan ifadeler çıkarılmış ve 21 ifadeden oluşan dört boyutlu bir ölçek elde edilmiştir. Boyutlar; tercih, teşvik, tesis imkanları ve nitelik olarak adlandırılmıştır. Ölçeğin KMO değeri 0.870 olarak hesaplanmış ve ortaya çıkan boyutların toplam varyansın %56.387’sini açıkladığı görülmüştür. Ardından doğrulayıcı faktör analizi yapılarak uyum indeksi değerlerine bakılmış ve değerlerin iyi uyum sağladıkları belirlenmiştir. Daha sonra geçerliliği test edilen ölçeğin güvenirlik analizi yapılmış ve Cronbach Alfa değeri 0.866 olarak bulunmuştur.

Tartışma: Geliştirilen üçüncü yaş turizmine yönelik algı ölçeğinin geçerli ve güvenilir bir ölçek olduğu sonucuna varılmıştır. Daha önce üçüncü yaş turizmine yönelik bir algı ölçeğinin geliştirilmemiş olmasından dolayı yapılan bu çalışmanın literatüre katkı sağlayacağı düşünülmektedir.
Son Kilometre (Adım) Teslimatta Blokzincir Teknolojisinin Kullanımı
Authors: TORAMAN Yavuz , MERDİVENCİ Fahriye , TEKİN Makber
Published: December 2022

Teknolojik gelişmeler 2000’li yılların başından itibaren hızlanarak yayılmaya başlamıştır. İlerleyen süreçlerde teknolojinin yeni bir ürünü olan blokzincir teknolojisi insan hayatına girmiştir. Söz konusu teknolojinin en önemli özelliği ise Tam (Gerçek) zamanlı veri aktarımıdır. Blokzincirin dağıtık ağı sayesinde insanlar herhangi bir merkeze bağlı kalmaksızın kendilerine ait olan verilerin takibini yapabilmektedir. Blokzincir teknolojisinin ürün ve kargo teslimat takibinde kullanılması tüketicinin ürününü anlık olarak takip edebilmesine olanak sağlarken teslimat zamanının tam olarak bilmesi gün içinde zaman kullanımını daha verimli hale getirecektir. Bu çalışmanın amacı lojistik sektörüne önemli katkı sağlaması düşünülen blokzincir teknolojisine yönelik tutum, niyet ve kullanım kabulü süreçlerini incelemektir. Çalışmada yeni teknolojilerin kabulünde literatürde sıkça kullanılan Yeniliklerin Yayılması Teorisi (YYT) ve Teknoloji Kabul Modelinden (TKM) faydalanılmıştır. Araştırmada birden çok ilişkinin analizinde sıkça başvurulan Yapısal Eşitlik Modellemesi (YEM), Smart PLS 3 paket programıyla birlikte kullanılmıştır. Lojistik süreçlerde özellikle e-ticaret faaliyetlerinin son basamağı olan teslimatlarda blokzincir teknolojisinin kullanımı nihai tüketici tarafından olumlu karşılanmıştır. Teknolojiyi kendilerine uyumlu ve faydalı olarak görmeleri gelecekte bu blokzincir teknolojisinin daha yaygın bir kullanıma sahip olacağını göstermektedir.
ЯЗЫКИ НАРОДОВ РОССИЙСКОЙ АРКТИКИ В СИСТЕМЕ ШКОЛЬНОГО ОБУЧЕНИЯ: ДИНАМИКА ФУНКЦИОНИРОВАНИЯ В 2000–2022 ГОДАХ
Authors: Горячева Мария Александровна
Published: December 2022

В статье изучается тема функционирования языков народов, проживающих в регионах Российской Арктики, в системе школьного образования, в хронологическом срезе 2000/01– 2021/22 учебных годов, то есть за 21 год. Статистические данные по этой подсфере образования вписаны в широкий экстралингвистический контекст. Рассматриваются такие факторы: территория, относящаяся к Арктической зоне; ряд лингводемографических параметров проживающих там народов и их языков (общая численность этноса, в том числе на территориях преимущественного проживания, число говорящих на этих языках, число владеющих своим и русским языком, число считающих родным свой и русский языки). Рассматривается также законодательный аспект. Автор статьи на основе диахронического анализа статистического материала делает выводы о динамике изучения в школах языков народов Арктического региона. Акцентируется внимание на обнаруженных нестыковках и явных ошибках в обобщающих статистических таблицах, выкладываемых в последние годы на официальном сайте Министерства просвещения РФ. Такой анализ не только убережет исследователей от ошибок, но и будет способствовать привлечению внимания к проблеме увеличения в последние годы их числа при обработке статистических данных в министерстве.
Fizyoterapistlerin Kişi Örgüt Uyumu ve Tükenmişliklerinin İşten Ayrılma Niyetine Etkisi: Ankara İli Kamu Hastaneleri Örneği
Authors: BAL Merve Emine , ATICI Emine , DANAYİYEN Aysun
Published: December 2022

Bu çalışma Ankara İli Kamu Hastanelerinde görev yapan fizyoterapistlerin kişi-örgüt uyumu ve tükenmişliklerinin işten ayrılma niyeti üzerine olan etkisini belirlemek amacıyla yapıldı. Çalışmanın evrenini Ankara İli merkez ilçelerinde yer alan ve İl Sağlık Müdürlüğüne bağlı 11 Eğitim ve Araştırma Hastanesi, 7 Devlet Hastanesi ve 1 Ankara Şehir Hastanesinde görev yapmakta olan 251 fizyoterapist oluşturmaktadır. Çalışmaya 152 kişi dahil edildi. Çalışmada, literatürde yer alan sınanmış ölçekler tercih edilerek, fizyoterapistlerin kişi-örgüt uyumu, tükenmişlikleri ve işten ayrılma niyetlerini ölçmek üzere anket formu kullanılmıştır. Ölçekler likert tipi ölçek olup beşli derecelendirilmiştir. Araştırmada katılımcıların duygusal tükenme, kişi-örgüt uyumu, işten ayrılma niyetinin orta seviyede, duyarsızlaşma düzeylerinin düşük seviyede, kişisel başarı tükenmişlik düzeyinin ise yüksek seviyede olduğu tespit edilmiştir. Tükenmişlik ile kişi-örgüt uyumu arasında negatif ve anlamlı ilişki olduğu (r=-0,501, p=0,000) tükenmişlik ile işten ayrılma niyeti arasında pozitif ve anlamlı ilişki olduğu (r=0,503, p=0,000) bulunmuştur. Katılımcıların mesleki tükenmişlik düzeylerinin işten ayrılma niyeti üzerine etkisine ilişkin çoklu doğrusal regresyon analizi sonuçlarına göre tükenmişlik düzeyinin işten ayrılma niyetinin üzerinde %25,9 etkisi olduğu ve bu etkinin istatistiksel açıdan anlamlı olduğu tespit edildi (r2=,259; p
Çölyak Hastası Çocukların Hastalıklarına Yönelik Tutumları ve Etkileyen Faktörler
Authors: BİŞGİN Fetih , ÖZAKAR AKÇA Selen , TURAN Ahu Pınar
Published: December 2022

Bu çalışma ile 9-17 yaş aralığında çölyak hastası çocukların hastalıklarına yönelik tutumlarının belirlenmesi amaçlanmıştır. Bu araştırma, tanımlayıcı ve kesitsel olup, İç Anadolu Bölgesinde bir ilde bulunan bir Eğitim ve Araştırma Hastanesi Pediatrik Gastroenteroloji Polikliniğinde yapılmıştır. Araştırma, 01 Mart 2019-01 Mart 2020 tarihleri arasında gastroenteroloji polikliniğine başvuran, en az altı aydır çölyak hastası olan, kendisi ve ebeveyni çalışmaya katılmayı kabul eden 54 çocuk ile gerçekleştirilmiştir. Araştırma verileri “Tanıtıcı Bilgi Formu” ve “Çocuğun Kendi Hastalığına Yönelik Tutumu Ölçeği” (ÇKHYTÖ) kullanılarak toplanmıştır. Araştırma verileri uygun istatistiksel analizlerle değerlendirilmiştir. Araştırmaya katılan çölyak hastası çocukların yaş ortalaması 13,09±2,68’dir. Çocukların ailelerinin %55,6’sının glutensiz gıdalara ulaşmada/hazırlamada zorlandığı belirlenmiş olup, ÇKHYTÖ puan ortalaması 2,88±0,71’dir. Araştırmadaki çocukların tanı alma zamanları, aile desteğini yeterli görme, glutensiz diyete uyma ve glutensiz diyeti uygulamakta zorlanma durumları ile ÇKHYTÖ puan ortalamaları arasındaki fark anlamlıdır (p
Makine Öğrenmesinde Kategorik Veri Kodlama Tekniğinin Kullanımına Alternatif Bir Çözüm Yöntemi
Authors: ŞAHİNASLAN Ender , GÜNERKAN Mustafa , ŞAHİNASLAN Önder
Published: December 2022

Makine öğrenimi, derin öğrenme algoritmaları kullanarak insan zekâsını taklit eden bir teknolojidir. Öğrenme algoritmaları yalnızca sayısal veri kümeleri üzerinde çalışır. Kategorik veri kümeleri nitel veya nicel verilerden oluşur. Nitel veri setlerinin öğrenme algoritmalarında kullanılabilmesi için veri setinin sayısallaştırılması gerekmektedir. Sayısallaştırma için etiket kodlama, sıralı kodlama, toplam kodlama, ikili kodlama ve sıcak kodlama gibi birçok kodlama tekniği vardır ancak bu kodlama teknikleri performans, maliyet ve kullanım açısından bazı güçlükler ve yetersizlikleri barındırmaktadır. Diğer taraftan bir kodlama tekniği ile elde edilen eğitim çıktısının orijinalinin bilinmesine ihtiyaç duyulabilmektedir. Bu çalışma, kategorik verilerin sayısallaştırılmasında kodlama tekniklerinin kullanılmasından kaynaklanan yetersizliklere çözüm olabilecek, daha özgün ve daha iyi performansa sahip bir altyapı oluşturma arayışının bir sonucu olarak ortaya çıkmıştır. Geliştirilen yöntem uluslararası bir lojistik firmada 7 farklı kategoride toplam 46 kategorik özellik ve 80.154.139 adet veri üzerinden uygulanmıştır. Testlerin sonucuna göre veri setleri bazında %23.07 ile %300.13 arasında toplamda %153.62 performans kazancı elde edilmiştir. Bu sonuçlar, geliştirilen yöntemin daha başarılı ve uygulanabilir olduğunu göstermektedir. Çalışma, yüksek performans kazancı ve özgün yapısı ile benzer alanlarda kolaylıkla kullanılabilecek bir yapıya sahiptir. Makine öğrenmesinde kodlama tekniklerinin kullanımına alternatif bir çözüm sunmuştur.
The Effect Of 8-Week Core Training On Agility, Strength Performance And Tennis Skills On 10-14 Year Old Tennis Players
Authors: ARSLAN Engin , ERGİN Esin
Published: December 2022

This study aims to determine the effect of 8-week core training on agility, strength performance and tennis skills in tennis players aged 10-14. 25 tennis players studying tennis at EA Tennis Academy participated in the study voluntarily. First of all, vertical jump, pro-agility agility and ITN Tennis skill tests were applied to all participants, then, in addition to tennis training, the experimental group of 11 people was given core training 3 times a week for 8 weeks in a row in line with the literature. The tennis players in the control group continued only their tennis trainings. In order to examine the effect of core training on strength, agility and tennis skills, the tests applied in the pre-tests were applied to all participants again at the end of 8 weeks as post-test. Using the pretest-posttest measurements taken in the study, the effect of 8-week core training on the strength, reactive agility and tennis skills of 10-14-year-old tennis players was determined. According to the results, a statistically significant improvement was observed in the ITN numbers, ITN scores, agility of the tennis players in the experimental group. Also, within limited aspects, a statistically significant difference was found in ITN numbers, ITN scores in the control group. On the other hand, there was no statistically significant difference in vertical jump and counter movement jump test scores in both groups. As a result, it has been concluded that core training has positive contributions to agility, balance and tennis performance in tennis players aged 10-14. It is thought that core training to be applied in addition to tennis training in training programs will contribute to the development of athletes.
Zihinsel Dayanıklılık ile Parkur Performansı Üzerine İlişkisel Bir Araştırma
Authors: KOÇ İsmail , ERGİN Rıdvan , GENCER Eylem , MARANGOZ İrfan
Published: December 2022

Amaç: Spor Bilimleri Fakültesi Özel Yetenek Sınavına (ÖYS) katılan sporcu-öğrencilerin zihinsel dayanıklılık düzeyleri ile parkur performansları arasındaki ilişkiyi ortaya koymak ve zihinsel dayanıklılığı cinsiyet, yaş, spor yılı ve başvurulan bölüm değişkenlerine göre incelemek amacıyla gerçekleştirilmiştir. Materyal ve Metot: Araştırma betimsel (tarama) ve ilişkisel (korelasyonel, nedensel karşılaştırma) deseniyle gerçekleştirilmiştir. Araştırmanın çalışma grubunu 2021-2022 eğitim-öğretim yılında Kırşehir Ahi Evran Üniversitesi (KAEÜ) Spor Bilimleri Fakültesi ÖYS ye katılan, tesadüfi örnekleme yöntemine göre belirlenmiş 18-25 yaş aralığında 494 sporcu-öğrenci (nKadın=107; nErkek=387) oluşturmuştur. Araştırmada veri toplama aracı olarak Sporda Zihinsel Dayanıklılık Envanteri (SZDE), kişisel bilgi formu ve ÖYS koordinasyon parkuru skorları kullanılmıştır. Elde edilen verilerin analizinde korelasyon analizi, bağımsız örneklemlerde t-testi ve tek yönlü varyans analizinden yararlanılmıştır. Bulgular: Analiz sonuçlarına göre katılımcıların ÖYS parkur skorlarıyla Sporda Zihinsel Dayanıklılık Envanteri (SZDE) güven alt boyutu arasında negatif yönlü anlamlı ilişki bulunmuş, SZDE total ve diğer alt boyutlar arasında anlamlı ilişki saptanmamıştır. Bunun yanında erkek sporcu-öğrencilerin kadın sporcu-öğrencilere nazaran SZDE total ve alt boyut ortalama puanlarının anlamlı düzeyde yüksek olduğu görülmüştür. Katılımcıların SZDE total ve alt boyut ortalama puanları ile yaşları arasında anlamlı ilişki saptanmamıştır. Bununla birlikte sporcu-öğrencilerin spor yaşıyla SZDE total, güven ve devamlılık alt boyutları arasında pozitif yönde anlamlı ilişkiler bulunmuş, kontrol alt boyutunda anlamlı ilişki saptanmamıştır. Bölüm değişkenine göre, Antrenörlük Eğitimi Bölümü ve Spor Yöneticiliği Bölümüne başvuran sporcu-öğrencilerin SZDE total ve devamlılık alt boyutu skorları arasında Antrenörlük Eğitimi Bölümüne başvuranların lehine anlamlı fark saptanmış, güven ve kontrol alt boyutlarında anlamlı fark saptanmamıştır. Sonuç: Zihinsel dayanıklılık (güven) düzeyleri artarken parkur performansları iyileşmektedir. Bunun yanında, zihinsel dayanıklılık yaş ile ilişkili değilken spor yaşıyla ilişkilidir. Ayrıca, erkek katılımcıların zihinsel dayanıklılık düzeyleri kadınlardan yüksektir. Bunlara ilaveten Antrenörlük Eğitimi Bölümüne başvuran sporcu-öğrencilerin zihinsel dayanıklılık düzeyleri Yöneticilik Bölümüne başvuranlardan yüksektir. Araştırma sonuçları 2021-2022 eğitim-öğretim yılı KAEÜ Spor Bilimleri Fakültesi ÖYS ile sınırlıdır ve elde edilen sonuçlar bu çerçevede genellenebilir.
Preclinical Models of Follicular Cell-Derived Thyroid Cancer: An Overview from Cancer Cell Lines to Mouse Models
Authors: Jeon Min Ji , Haugen Bryan R.
Published: December 2022

The overall prognosis of thyroid cancer is excellent, but some patients have grossly invasive disease and distant metastases with limited responses to systemic therapies. Thus, relevant preclinical models are needed to investigate thyroid cancer biology and novel treatments. Different preclinical models have recently emerged with advances in thyroid cancer genetics, mouse modeling and new cell lines. Choosing the appropriate model according to the research question is crucial to studying thyroid cancer. This review will discuss the current preclinical models frequently used in thyroid cancer research, from cell lines to mouse models, and future perspectives on patient-derived and humanized preclinical models in this field.
Effect of snap-through force location on morphing of bistable variable stiffness laminates
Authors: Anilkumar P.M. , Haldar Ayan , Rao B.N.
Published: December 2022

Unsymmetric composite laminates exhibit two or more stable states due to the presence of residual thermal stresses induced during the curing process. The paper aims to exploit the possibility of assessing the morphing behaviour of bistable composite laminates using semi-analytical and numerical models. A Rayleigh-Ritz based semi-analytical model is used to investigate the variable stiffness (VS) bistable laminates generated using curvilinear fibre alignments. The obtained results are verified using a fully non-linear numerical model developed in a commercially available finite element package. In order to identify the influence of loading location on the snap-through behaviour, a parametric study is proposed in the present research. Snap-through is achieved through transverse point loads. The novelty of this work resides on the investigation of load application location on the snap-through action where the transverse load is applied at various locations on the lamina surface. Earlier research on the morphing of bistable square composites is mainly on the application of concentrated load at the centre of the laminate geometry, which is considered as an ideal location for snap-through action. The designer may also have to choose other locations for the application of snap-through loads since the lamina centre may not be appropriate always in structural applications. Four different loading locations are selected for the present analysis, and snap-through loads are calculated to check the effect of loading location. Parametric studies are performed using the proposed semi-analytical and numerical models to investigate the effect of selected loading point positions on the snap-through process. The analysis is extended to a selected VS laminate family to understand the influence of loading point positions on the curvilinear fibre alignments.
Numerical study on Role of Shear Key in Precast Beam to Beam Connection Subjected to Torsion
Authors: Raiyani S.D. , Joshi D.D. , Patel P.V. , Ramani S.R.
Published: December 2022

Connections play an important role in behaviour of precast concrete structures. It is also observed that the failure of precast building took place because of connection failure. Generally connection between precast elements are designed for axial force, shear force and bending moment. But when the precast beam supports precast slab of different span on both the side, torsional moment cannot be neglected. Therefore, it is important to study the behaviour of precast connections under the effect of pure torsional loading. In this paper effectiveness of shear key on behaviour of precast beam to beam connection under pure torsion is presented. A numerical simulation is carried out to investigate the torsional behaviour of three different type of precast wet connections with and without shear key using Finite Element Method based software ABAQUS. Projected longitudinal reinforcement of precast beam elements are welded after their erection and the gap is filled with concrete. The damaged plasticity model is employed for modelling the behaviour of concrete and elastic perfectly plastic models are employed for the modelling of behaviour of steel reinforcement. A prefect bond is assumed between the steel reinforcement and concrete. The damage along cracks, are modelled through concrete damage parameters. Precast beam connection with out shear key is considered as control beam. While other beam to beam connections have shear key of different configuration. Torque v/s twist behaviour and damage patterns as obtained from numerical analysis of different precast beam connections with shear key are compared with control specimen. Analysis results exhibited enhanced torsional strength of precast beam connection with shear key in comparison of connection without shear key.
Strengthening of Recycled Coarse Aggregate using Different Surface Treatment Techniques
Authors: Merin Mathew , Girija K. , Sreedevi A.R.
Published: December 2022

Numerous studies performed on recycled aggregate indicated that recycled aggregate has the undesirable characteristics of porosity, high water absorption, and low crush resistance due to the presence of porous mortar as well as the tiny seams derived from the crushing process. This study involves strengthening of RA using various surface treatment techniques like treatment with pozzolan slurry (fly ash, alccofine and cement slurry), HCl, polyvinyl alcohol and an optimized triple mixing method. The physical and mechanical properties of RA were comprehensively assessed before and after the surface treatment. The optimum percentage of replacement of natural coarse aggregate with treated recycled coarse aggregate is also found out based on compressive strength. It suggests that treatment using fly ash and cement pozzolan slurry is an efficient and feasible method for improving the mechanical properties of recycled coarse aggregate. This treatment of recycled coarse aggregate is not only an efficient way for enhancing the properties of recycled aggregate, but also an environmental friendly approach. Also the optimum percentage replacement of treated recycled aggregate was obtained as 60%.
Effect of Banana Fibre on Strength Properties of Bagasse ash and Rice Husk ash blended high performance concrete composite
Authors: Logeshwar A.B. , Bhuvaneshpandi M. , Harishkanna V. , Midhunkumar R. , Praveenkumar S.
Published: December 2022

This paper presents the details of an experimental investigation conducted on various specimens to understand the behavior of high-performance fiber reinforced concrete composites with banana fibers of 0.2%, 0.4% and 0.6% to the total volume of concrete blended with agricultural wastes such as bagasse ash (BA) and rice husk ash (RHA). All the mix contains varying proportions of 7.5%, 10% and 12.5% of RHA and constant 10% of BA replaced with Portland cement. The results of the experimental investigation show that the addition of 10% BA and 10% RHA enhances the mechanical properties of the conventional concrete. By the incorporation of banana fiber, the properties of BA andRHA blended high performance concrete was substantially increased. From the various combinations of banana fiber, the best performance was attained by the mixture that contains the proportions of 0.2% of banana fiber.
Electrical Resistivity of Crumb Rubber Concrete (CRC) exposed to coastal zone- An Experimental Investigation
Authors: Yadav BejayKumar , saha Showmen
Published: December 2022

Electrical resistivity is a material property that can be used for analysis of concrete durability and also can be used to determine early age characteristic of fresh concrete. Electrical resistivity has developed as a new form of non-destructive testing technique. In this study, an experimental study is carried out to determine the electrical resistivity of crumb rubber concrete exposed to normal and coastal environment. Crumb rubber concrete (CRC) is a concrete in which sand is replaced with fine rubber crumb obtained by shredding of waste vehicle tires. In this study, sand was replaced up-to 15% in multiples of 2.5% and then a set of samples were kept for curing and exposure in normal environment and other set of samples were exposed to coastal environment along the coast of Visakhapatnam, Andhra Pradesh. The result obtained indicated that CRC samples showed lower electrical resistivity in the initial days and then resistivity increased at later stages. Chloride ingression test was also conducted on the samples which indicated that crumb rubber concrete showed better resistance to chloride ion penetration. Overall, the result analysis expressed that samples exposed to coastal zone showed lower resistivity, and CRC samples in case of both curing methods and exposure cases showed better resistivity to electrical conduction and chloride ingression than normal concrete samples. So as CRC shows better durability properties than normal concrete, it can be opted as a choice for concrete structures in coastal areas.
Geometric Nonlinear Analysis of RC Frame structure using Applied Element Method (AEM)
Authors: Karad P.B. , Patel P.V.
Published: December 2022

Reinforced Concrete (RC) structural elements having vast varieties of applications. Understanding the failure mechanism, deflection capacity beyond elastic limit is very important from the structural engineering point of view. Various RC structures are slender in nature which produces large deformations due to geometric nonlinearity. Nonlinear analysis of RC structures is very complex in nature and hence there is need of highly efficient numerical method. Applied Element Method (AEM) is a displacement-based method which can track highly nonlinear behavior of the structure i.e. crack initiation and propagation, element separation, rigid body motion of structural elements and total collapse process with the high accuracy. In this study, the aim of the geometrical nonlinear analysis is to predict the deflection of the RC structure at various loading interval. In this paper the results obtained using AEM are compared with the Finite Element Method (FEM) based results obtained using the ABAQUS software. It is observed that there is a close agreement between the results obtained using AEM and FEM which shows that, AEM can be used for the geometric nonlinear analysis of the structures effectively.
Numerical modeling and nonlinear analysis of semi-rigid jointed steel frames
Authors: Bandyopadhyay Milan , Banik AtulKrishna
Published: December 2022

This paper investigates the effect of semi-rigid connection, geometric nonlinearity and material nonlinearity in steel frame analysis. To study the independent and combined effects of different nonlinearities, elastic and inelastic analyses are carried out using general purpose finite element software SAP2000. Connections are modeled as rotational springs and frame as one dimensional beam element. Verification and application of the simplified numerical model developed in the present study is demonstrated by considering different examples and comparing the results of present study with those available in the published literature. Numerical alternatives, key features about modeling and necessary input parameters are discussed in detail. Rotational springs are characterized by linear, bilinear, multi-linear or nonlinear moment-rotation relationships of the connection. Results in terms of beam moment and nodal displacement are presented for both elastic and inelastic analyses. With the increase in connection flexibility, beam mid-span moments and displacements increase, but beam-end moments decrease. It is observed that the influence of connection nonlinearity dominates over material and geometric nonlinearities.
Higher-Order Obstacle Problems evaluation through Novel Approach
Authors: Ganesh Engammagari , Shrimali M.K. , Ramana P.V.
Published: December 2022

Bridge problems are challenging, but this revolutionary solution streamlines the procedure. Many other difficulties were investigated, including the 4th order non-homogeneous obstacle bridge problem. A fundamental supported continuous beam with n supports and variable loading conditions is employed for this aim. Different limits were taken for various cases, solved using novel techniques, and compared with the computational method. A novel techniques methodology approach was used to multi-support and continuous bridge issues to increase the accuracy and conjunction of the abovementioned problems. Ongoing support bridge issues may be promptly remedied using creative ways. The findings of the unique technique approach gather quickly and are closer to the precise answer. This work uses the novel methodology for numerous initial value issues, such as diverse case problems. This approach has been used in a variety of engineering sectors. This approach has been used in very little research on dynamics. As a result, an effort has been undertaken to investigate the validity of such an approach. The approach provided accurate answers to the majority of the difficulties.
Behaviour of High-Performance Fibre Reinforced Concrete Composite Short and Slender Columns under Uniaxial Compression
Authors: Praveenkumar S. , Sankarasubramanian G.
Published: December 2022

This paper describes the experimental studies carried out on the RC short and slender columns of bagasse ash blended HPC with influence of steel fibre (STF) and polypropylene fibre (PPF)are presented. The concrete was considered for M60 grade as recommended by P.C.Aitcin. The mix included both free steel fibre and polypropylene fibre, and furthermore the hybridization of steel fibre and polypropylene fibre at a total volume fraction of 1.0% by volume of concrete with 10% bagasse ash as a substitution of cement. Behaviour of eleven HPFRCC of each short and slender column with steel fibre, polypropylene fibre and hybrid fibres was examined. The behaviour of each column was assessed and presented with respect to load carrying capacity. The numerical studies were done using ABAQUS 6.9 to validate the experimental results.
Effects of different shapes of aggregate on the behaviour of plain concrete beam at meso-scale
Authors: Pal B. , Ramaswamy A.
Published: December 2022

In this study, behaviour of plain concrete beam under three-point bending is simulated at meso-scale (10-4 -10 cm). At meso-level, concrete is assumed to consists of either a two-phase or a three-phase composite material (mortar, aggregate and/or interfacial transition zone-ITZ). First, the aggregates are generated based on a given aggregates gradation and then those are placed randomly within the concrete sample following uniform distribution. The remaining space of the concrete sample is then filled with the mortar in case of a two-phase assumption. However, in three phase modelling, a part of the mortar of finite thickness surrounding the aggregates is assumed as ITZ. In this study, three different shape of aggregates: circular, elliptical and polygonal, are considered and their effect on the simulated load deformational response of plain concrete beam is studied. The simulated results are then validated with the corresponding available experimental data. A statistical analysis based on variability of aggregates generation for three different shapes of aggregates is also performed.
Effect of Structural Shape on Seismic Response of Air Traffic Control Tower
Authors: Sarvade Aishwarya , Waghmare Manisha , Amrutkar Sonali
Published: December 2022

Air Traffic Control Towers (ATCT) is one of the obligatory infrastructures for the airport to control the takeoff and landing of airplanes. The primary purpose of ATCT is to prevent collisions and shape the flow of air traffic. Due to a lack of adequate information about the seismic analysis, the performance of ATCT is generally considered to be the same as that of normal structures. However, the performance and demands of ATC towers differ significantly from common structures. In the present study, the analysis of ATCT for different structural shapes (viz., Hexagonal, Octagonal, Pentagonal, Square) with a height of 55m has been investigated. The structural performance of these models has been studied by different time history analysis using commercial software ETABs. The results exhibited that the performance of octagonal and hexagonal configurations was effectively better for seismic loads as compared to the pentagonal and square configuration in respect of story displacement, story drifts, story shear, and time periods. The seismic analysis also shows that the octagonal shape attracted larger base shear than pentagonal, hexagonal, and square shaped ATCT. However, due to more lateral resisting capacity, the drifts and displacements are found to be least.
Vulnerability of Multistory RCC Framed Building with Shear Wall During Fire
Authors: Alam Aftab , Alam Mehtab
Published: December 2022

Fire in a building is a casual phenomenon but cannot be completely ruled out in spite of the facts that buildings are provided with mandatory fire safety measures. A symmetrical in plan with 5 bays with 20 stories regular RCC building has been considered with fire at three different level that is at the bottom, middle and top. The building has been designed for gravity loads and lateral loads having three different configuration of shear walls and columns. Fire temperature of 700 0C was considered. The minimum value of maximum fire temperature for failure of vertical members has been found out by iterations. The worst verticals members due to fire has been identified and their displacement calculated. Best location of shear walls using commercial software etabs is used for the analysis and design.
Displacement in Deep Propped Cantilever Beam Subjected to Semi-elliptical Load
Authors: Mahajan Aishwarya , Gaikwad Sagar , Dahake Ajay
Published: December 2022

A fifth order shear deformation theory considering transverse shear deformation effect is presented for displacement in propped cantilever beam. The considered displacement field accounts for non-linear variation corresponding to depth of beam. Governing equations and boundary conditions of the theory are obtained using the standard of virtual work. Numerical results for static deflection analysis for aspect ratio (length to depth) 2 to 50 for isotropic beam is obtained. The results of present theory are in close agreement with those of higher order shear deformation theories.
Nonlinear Seismic Analysis of Perforated cold-formed steel shear wall with Upright Section
Authors: Senapati Simran , Sangle KeshavK.
Published: December 2022

During the last few decades, cold-formed steel (CFS) is extensively used in mid- and low-rise housing due to the increasing demand of rapid constructions along with its various advantages in comparison with other structural material. Cold-formed steel framed shear walls (CFSFSW) are most common and primary lateral load resisting system. However, adopting it in the seismic zone is difficult, especially because many design components remain open. In this research an effort has been made to design the shear wall system with both unperforated and perforated upright sections using nonlinear static analysis method. In ABAQUS, a general-purpose finite element analysis software, three-dimensional models using shell elements are used to simulate a shear wall system. A comparative study regarding the lateral load capacities with respect to maximum allowable lateral deflection including different parameters like column sections, thickness and perforation arrangements are presented here. It was found that increasing thickness and including Chanel stiffeners improves the lateral strength of original upright section. The developed modelling protocol helps to estimate its lateral performance under earthquake with reasonable accuracy.
Chronology of Recycled Plastic Mathematical Models, Mechanical and Thermal Characterisation
Authors: Meena Ayush , Sharma Tushar , Patodiya Mohit , Ramana P.V.
Published: December 2022

Recycled plastic fibers restrict the characteristics of hardened concrete. They offer no considerable ductility after the initial fracture. Their capacity to prevent bleed and separation helps preserve the original water-cemetery ratio of the surface mortar, thereby enhancing the abrasion resistance. Recycled plastic fibers can be efficient in dispersing stresses and improving frost resistance. The spilling of concrete into the fire has also proven to reduce. Recycled plastic fibers enhance initial characteristics in sprayed concrete and decrease the shedding and rebound. The tiny recycled plastic fibers, which should have similar structural advantages to steel fibers, must be distinguished from giant synthetic fibers. PP is fully resistant to acid and alkaline circumstances and is not affected by acid/alkaline environments, including marine conditions. Chemically PP is non-absorbent, i.e., no moisture absorption and associated characteristic changes.
Comparison of Analytical and Finite element method of live load distribution in T Beam Girder Bridge
Authors: Mohan T.J. , Ramtekkar G.D. , Bhatt Govardhan
Published: December 2022

T-Beam bridges are widely used for short span of varying from 12 m to 25 m because of their cost effectiveness despite of its complexity in analysis. Live load distribution is a crucial step in analysis of any type of bridge since it gives force or moment for which bridge components need to be designed. Among the various methods of live load distribution, comparison between Courbon’s Method, Morice-Little method and Finite element method has carried out herein. Present study aims to determine the most appropriate method of Live load distribution in T Beam Girder Bridge. Total eight bridge models were considered for the purpose of analysis with span varying from 12m to 24m i.e., 12m, 16m, 20m and 24m with three and four girders for each span. Finite element software SAP 2000 has used for Finite element analysis of Bridge. Finite element result were compared with Courbon’s method and Morice little method results.
Analytical Study on Seismic Behavior of Rectangular Shear Wall Connected to Floor Slabs
Authors: Kaushik S. , Dasgupta K.
Published: December 2022

For construction of reinforced concrete buildings over four stories, structural walls are the predominant form for lateral load resistance under earthquakes. Current Indian seismic code for design of frame shear wall buildings (FSWB) do not explicitly consider the forces transferred from the floor slabs to the shear wall for seismic design. To assess stress concentration at the wall-slab junction region of the building and to observe the extent of possible damages in wall, slab and their junction region, nonlinear static analyses is carried out using ABAQUS program. Further, a wall-slab sub-assemblage is also analyzed to stimulate the observed behavior of the walls in the multistoried buildings and the behavior is compared with the isolated cantilever shear wall. The main intention of the study carried out is to study the behavior of the junction region between the shear wall and the floor slab and to develop a simplified but efficient analytical model to analyse a shear wall - floor slab junction. It is observed that the presence of floor slab at different levels along the height of slender shear wall tends to partition the wall into squat wall panels between two consecutive floors. Thus, an overall seismic design methodology for damage avoidance behavior of floor slabs in multistoried RC frame-wall building needs to be evolved.
Influence of Structural Parameters on the Buckling of Longitudinal Steel Bar in RC Structural Wall
Authors: Sarkar N. , Dasgupta K.
Published: December 2022

Reinforced Concrete (RC) structural wall is widely used in multistoried RC frame buildings to enhance lateral stiffness and lateral strength for earthquake resistance. One of the possible failure modes, observed during strong earthquake shaking, is the buckling of longitudinal steel reinforcement in the boundary elements of the wall. This also assumes importance in establishing damage states for seismic fragility analysis of RC wall. Although a few past studies have focussed on longitudinal bar buckling in RC members, detailed parametric study is absent particularly for such instability of bars in the boundary elements of the wall. In the present study, displacement-controlled nonlinear static analysis of several wall specimens is carried out using fibre-discretization of cross-section and distributed plasticity modelling in OpenSEES. Here, 27 different models of the isolated slender wall are created considering variations in six structural parameters, namely (a) length ratio of the boundary element to the wall, (b) axial force ratio, ratios of (c) longitudinal steel in web, and (d) transverse steel and (e) longitudinal steel in the boundary elements. The effect of wall thickness is accounted for through variation in axial force ratio. Using the analytical results from the nonlinear analysis of the wall models, the trends in drift ratio at the onset of longitudinal bar buckling damage states as functions of various key structural wall properties, has been investigated.
Finite Element Parametric Studies on Buckling Restrained Brace
Authors: S. P. , S. Shete , Madhekar N. , Ghowsi A.F.
Published: December 2022

Concentric Braced Frame (CBF) is an efficient lateral load resisting system. It adds stiffness and strength to the structural system. However, the repeated failures of concentric braces in the past earthquakes has raised concern of its overall seismic performance and ultimate deformation capacity. Buckling Restrained Brace (BRB) is becoming popular energy dissipation device in the field of seismic resistant steel structures. BRB absorbs substantial amount of energy during cyclic performance. By preventing the buckling of the brace, a symmetric and stable hysteresis curve of BRB is achieved, as it dissipates high amount of energy in every single cycle. In the present research work, numerical modelling, and prediction of cyclic response of concrete BRB is presented. The numerical model is validated by comparing the results with the previous experimental work. Numerical simulations have been performed using the finite element software ABAQUS. The yielding core length is varied from 1m to 3 m, and the coefficient of friction is varied from 0 to 1. The parametric study is carried out to investigate the influence of yielding core length and coefficient of friction on the hysteretic performance of concrete BRB. The performance of all the numerical models is accessed by comparing their hysteretic response and the compression adjustment factor. With increasing the friction coefficient between the steel core and the concrete, an unsymmetrical hysteretic response is observed, with reduction in energy dissipation. Axial stiffness of short length BRB is found to be higher, as compared to the longer length. From the parametric study, it is revealed that the length of the yielding core and friction impact the cyclic response of BRBs
Velocity Tracking Control Algorithm for Semiactive Control of Building Frames
Authors: Bhaiya Vishisht , Bharti S.D. , Shrimali M.K. , Datta T.K.
Published: December 2022

A new control algorithm called velocity tracking control (VTC) is presented for the semi-active control of partially observed building frames using magneto-rheological (MR) dampers. The novelty of the control algorithm relies on the use of special features of the semi active control using MR dampers in which the time history of voltage to be applied to the MR damper can be generated with the help of feedback information from the observed states only; it does not require the estimation of the full state from the measured ones which introduces some errors in the estimated control force generated in the MR damper. The algorithm is developed based on a physical reasoning, which is validated by the Lyapunov stability condition of the first order filter used in the modified Bouc-wen model that models the MR damper. The efficiency of the control algorithm is compared with the passive on control for a number of earthquakes. The response quantities of interest, for which percentage reductions in responses are compared, include the peak top floor displacement, peak inter-story drift and maximum base shear. The results of the study show that the proposed control algorithm provides the maximum percentage reduction in peak inter-story drift in comparison to passive on control. Further, the efficiency of the proposed control algorithm, defined by the percentage reduction of responses per unit control force, is found to be more as compared to the passive on control.
Seismic Evaluation of RC Building with Vertical Setbacks as per IS1893 (Part 1):2016
Authors: Shah Dhara , Padia Jaimin
Published: December 2022

Earthquake forces are the least predictable and most devastating form of forces. These forces are not only responsible for loss of economy, property and material but possess a huge threat to lives of people as well. In past several years, severe damages to buildings and causalities have been witnessed due to these disastrous forces there by challenging the designing and construction authorities. Many buildings are designed with vertical setbacks due to architectural, functional or economic reasons wherein fewer stories in a building are wider than rest of the building. Such setbacks in buildings cause sudden jump in seismic forces at the level of discontinuity due to change in stiffness, mass and strength distribution along height. This might lead to torsion in the building under seismic forces. Structures incorporating vertical irregularities need to be studied for their behavioural aspects, identifying the weak links which might trigger the collapse. In the present study, effect of vertical geometric irregularities in a building is studied with respect to a regular building using equivalent static method and response spectrum method as per IS1893 (Part 1): 2016. The results obtained are compared in terms of displacements, storey drift, base shear, forces, modal time period, modal mass participation factor and % increase in structural members along with concrete quantity.
Analytical Evaluation of Most Effective Diagrid Angle Considering Severe Earthquake Time Histories
Authors: Naik SwaralR. , Naik MalharP. , Desai S.N.
Published: December 2022

High rise structures and their structural mechanisms are evolving rapidly due to an exponential growth of urbanization. Few conventional structural systems have been efficient in withstanding heavy wind gusts as well as earthquakes. A newcomer in the list of sustainable high-rise structures is the Diagrid. A diagonal grid or Diagrid structure is a framework of diagonally intersecting inclined column sections. Due to higher resilience and robustness, the trend is rapidly shifting towards Diagrid. Diagrid structures are adopted as they take into account a number of factors like structural stability, aesthetic appearance and economic considerations. The triangulated formation of columns and ring beams transform all the external forces into direct axial forces. The effectiveness of the diagrid mechanism depends on the angle of the diagrid. In this project, analysis of symmetric diagrid building, with various diagrid angles has been carried out using software SAP2000. The analysis results for top storey displacement, base shear and modal frequency are considered for evaluating the optimal range of diagrid angle considering earthquake time histories.
Numerical Study of Hybrid Steel Frames under Far-field Earthquakes
Authors: Sharma Vijay , Bhandari Mohit , Shrimali M.K. , Bharti S.D. , Datta T.K.
Published: December 2022

The 1994 Northridge and 1995 Kobe earthquakes have shown the susceptibility of severe damage of welded moment-resisting frames, especially at the beam to column connections subjected to severe earthquake ground-motions. Since then, an alternative of welded connections called bolted or semi-rigid connections is considered for designing or retrofitting of steel moment frames. From the last few years, the semi-rigid connections combined with rigid connections, termed as hybrid frames have become a promising approach to design the steel frames for enhanced seismic performance. In the present paper, a numerical study is carried out to investigate the seismic performance of the hybrid steel frames. For this purpose, a ten-story high-rise rigid steel frame is analyzed and designed for seismic requirements as per Indian Standards. The rigid connections of frames are replaced by semi-rigid connections with a moderate degree of semi-rigidity. The six different patterns (locations of semi-rigid connections) of hybrid frames are considered here to compare the seismic responses with those obtained from the rigid connected steel frame. The nonlinear time-history analyses are executed using the SAP2000 software at two scaled PGA level in compliance with design basis earthquake and maximum considered earthquake. An ensemble of five time-histories of far-field earthquakes is considered for the numerical study. A wide range of seismic response parameters, namely, the maximum value of base shear, top-story displacement, inter-story drift ratio, the total number of plastic hinges is extracted for the suggestion of a suitable pattern for hybrid frames. The major findings from the present numerical study show that the pattern and number of semi-rigid connections in the hybrid frame considerably affect the seismic performance of steel frames. It is also observed from the seismic responses that the hybrid frames are better than the rigid frame at high PGA levels.