Plastic collapse analysis of thin-walled circular tubes subjected to bending

Poonaya, Somya; Teeboonma, Umphisak; Thinvongpituk, Chawalit

doi:10.1016/j.tws.2008.11.005

Cited by 69 publications

(39 citation statements)

References 13 publications

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“…Sedangkan pada struktur baja berdinding tebal pertama-tama cenderung mengalami tekuk secara global tanpa mengalami suatu deformasi pada penampang dan selanjutnya mengalami suatu sendi plastis (plastic hinge) sederhana di tengah panjangnya dimana terjadi kerusakan 6,7,8,10,12) . Hasil penelitian Murray 4) tahun 1989 tentang mekanisme kerusakan plastis pada struktur baja berdinding tipis menunjukkan bahwa sendi plastis dapat terjadi dalam suatu cara simetris sebab mekanisme-mekanisme tersebut membuat sejumlah bentuk yang disebut mekanisme plastis dasar (basic plastic mechanisms) dimana antara satu dengan lainnya sesuai (compatible).…”

Section: Tinjauan Pustakaunclassified

“…Dengan mengacu pada penelitianpenelitian sebelumnya 3,6,9,12,14) dimana batas yang diizinkan ± 20 % dan berdasarkan hasil akurasi penelitian pada Tabel Pada ruas kanan terlihat variabel defleksi η. Untuk memeriksa secara sederhana dapat dilIhat bahwa jika nilai η = 0 maka akan diperoleh P e = 0 artinya grafik perilaku profil baja SHS cenderung meningkat sejalan peningkatan nilai defleksi η.…”

Section: Pembahasanunclassified

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Pengembangan Metode Evaluasi Kekuatan Profil Baja Persegi Menggunakan Pemanfaatan Gabungan Teori Mekanisme Plastis Dan Elastis

Kadir

Priadi

Siradj

et al. 2023

Majalah Ilmiah Pengkajian Industri

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AbstrakMetode analisis disain yang dikembangkan didalam penelitian ini tidak menggunakan faktor keamanan sehingga dapat digunakan untuk mendisain struktur baja yang mampu mendukung beban kerja dengan berat yang seringan mungkin sehingga diperoleh struktur yang efektif dan efisien dari segi teknis dan ekonomi. Dalam penelitian ini, suatu metode cut-off strength digunakan sebagai dasar untuk memprediksi kekuatan profil baja ringan berpenampang persegi (SHS) akibat interaksi beban tekan memusat dan momen lentur. Metode cut-off strength diilustrasikan dalam bentuk dua kurva beban-defleksi plastis dan elastis, dimana nilai beban diperpotongan kedua kurva tersebut diasumsikan sebagai kekuatan teoritis profil baja SHS terhadap interaksi tekan memusat dan momen lentur. Kurva plastis dibentuk berdasarkan persamaan beban-defleksi yang dikembangkan melalui analisis kesetimbangan energi model mekanisme kerusakan plastis profil baja SHS. Sementara itu, kurva elastis dibentuk berdasarkan persamaan beban-defleksi yang dikembangkan melalui analisis non-linear elastic profil baja SHS dengan mempertimbangkan efek local buckling pada penampang profil yang tertekan. Metode analisis ini diimplementasikan dengan menggunakan perangkat lunak (software) komputer. Untuk mengukur ketelitian model analisis disain yang dikembangkan dalam penelitian ini, hasil prediksi kekuatan profil baja SHS diverifikasi menggunakan data kekuatan aktual yang dihasilkan melalui pengujian sejumlah profil baja SHS akibat interaksi beban tekan memusat dan momen lentur sampai rusak. Hasil verifikasi menunjukkan bahwa rasio data prediksi analitis dan eksperimental masih tersebar dalam batas-batas toleransi yang umum digunakan yaitu ± 20 %.Kata kunci : mekanisme plastis, elastis non-linear, penampang persegi berlubang, sendi plastis, prediksi beban teoritis, kekuatan putus AbstractDesign analysis method developed in this study did not use a safety factor that can be used for the design of steel structures that are capable of supporting heavy working load with the weight as light as possible in order to obtain an effective and efficient structure in terms of technical and economic. In this research program, a method of cut-off strength is used as a basis of predicting the strength of a square hollow steel section affected by the interaction of concentrated-compressive load and bending moment. The method cut-off strength is illustrated in the form of two plastic and elastic curves of loaddeflection, where the value of load at an intersection of these curves is assumed to be the theoretical strength of the steel section with respect to the interaction of concentrated-compressive load and bending moment. The plastic curve is established according to a load-deflection equation that is developed through the

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Section: Tinjauan Pustakaunclassified

Section: Pembahasanunclassified

Pengembangan Metode Evaluasi Kekuatan Profil Baja Persegi Menggunakan Pemanfaatan Gabungan Teori Mekanisme Plastis Dan Elastis

Kadir

Priadi

Siradj

et al. 2023

Majalah Ilmiah Pengkajian Industri

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“…Yielding supports can be applied as one of the active means of prevention or localization of dynamic impact or reducing the intensity of dynamic loading [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Research in [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] focuses on the elaboration of working models of tubes, and provide comparison of the obtained results with analytical and experimental studies. The works consider the cases of static and dynamic axial and transverse straining of samples made from different materials, including the combined ones (sandwich-tubes).…”

Section: Introductionmentioning

confidence: 99%

Computer simulation of yielding supports under static and short-term dynamic load

Kumpyak

Mescheulov

2018

MATEC Web Conf.

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Abstract. Dynamic impacts that became frequent lately cause large human and economic losses, and their prevention methods are not always effective and reasonable. The given research aims at studying the way of enhancing explosion safety of building structures by means of yielding supports. The paper presents results of numerical studies of strength and deformation property of yielding supports in the shape of annular tubes under static and short-term dynamic loading. The degree of influence of yielding supports was assessed taking into account three peculiar stages of deformation: elastic; elasto-plastic; and elasto-plastic with hardening. The methodology for numerical studies performance was described using finite element analysis with program software Ansys Mechanical v17.2. It was established that rigidity of yielding supports influences significantly their stress-strain state. The research determined that with the increase in deformable elements rigidity dependence between load and deformation of the support in elastic and plastic stages have linear character. Significant reduction of the dynamic response and increase in deformation time of yielding supports were observed due to increasing the plastic component. Therefore, it allows assuming on possibility of their application as supporting units in RC beams.

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“…Yielding supports are considered to be one of the active means of protection of structures used for prevention or localization of dynamic impact or reduction of dynamic load intensity [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Application of yielding supports and their effect on stress-train state of structures subjected to dynamic loads still require investigation.…”

Section: Introductionmentioning

confidence: 99%

Deformability of oblique sections of RC beams on yielding supports under dynamic impact

Mescheulov¹,

Kumpyak²,

Lyulevich³

2017

AIP Conference Proceedings

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Abstract. Extreme events, both natural and man-made, have become more frequent. Explosions, falling or impact of bodies influence buildings and structures causing occurrence of high intensity inertia forces. Due to dynamic nature of the mentioned impacts they are to be considered in design calculations. The paper studies behavior of oblique sections of reinforced concrete (RC) beams under transverse dynamic loading; it describes the potential of using yielding supports, presented as inserted elements with ring cross-section. Experimental study included tests of 24 RC beams under shortterm dynamic impact of falling weight (265 kg). The behavior of RC beams was analyzed by measuring deformation of reinforcement and concrete, the value of supports reaction and impulse acting on a structure. The paper considers separate and joint effect of yielding supports and longitudinal compression on strength and deformability of RC beams. Longitudinal compressive force and yielding supports are proved to influence significantly the stress-strain state of oblique sections of RC beams under dynamic loading. Time of deformation is significantly prolonged in case of extended plastic component in yielding supports.

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Plastic collapse analysis of thin-walled circular tubes subjected to bending

Cited by 69 publications

References 13 publications

Pengembangan Metode Evaluasi Kekuatan Profil Baja Persegi Menggunakan Pemanfaatan Gabungan Teori Mekanisme Plastis Dan Elastis

Pengembangan Metode Evaluasi Kekuatan Profil Baja Persegi Menggunakan Pemanfaatan Gabungan Teori Mekanisme Plastis Dan Elastis

Computer simulation of yielding supports under static and short-term dynamic load

Deformability of oblique sections of RC beams on yielding supports under dynamic impact

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