薄肉H形断面鋼柱の連成座屈に関する研究

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著者

    • 山尾, 敏孝 ヤマオ, トシタカ

書誌事項

タイトル

薄肉H形断面鋼柱の連成座屈に関する研究

著者名

山尾, 敏孝

著者別名

ヤマオ, トシタカ

学位授与大学

名古屋大学

取得学位

工学博士

学位授与番号

乙第3098号

学位授与年月日

1986-12-25

注記・抄録

博士論文

This dissertation presents the theoretical and experimental study concerningthe interaction behavior of the local and overall buckling of welded thin-walledH-section columns. Brief description on each chapter is given below :Chapter 1 : The problem and review of previous investigations on theinteraction buckling is described.Chapter 2 : An incremental equilibrium equations for beam-column witharbitrary open cross sections is derived in a stiffness matrix form by using amoving element coordinate system and an incremental variational principle.Yielding of the material is judged as a bi-axial stress problem under normal andshear stresses by using the flow theory of plasticity assosiated with von Misesyield criterion. Validity and efficiency of the present method are shown byillusrative examples.Chapter 3 : This chapter describes the development of a finite elementmethod which enables to analyze a large displacement elasto-plastic behavior ofplate structures which fail by local instability. The plate element used in thismethod is the ordinary plannar triangluar element. The in-plane flexural stiffnessof the component plates is taken into account using a technique based onthe micropolar theory to avoid the singularity of the global stiffness matrix.Since a large portion of the displacement in the postbuckling behavior of theplate element is caused by a rigid body displacement, the nodal forces are calculated byeffective displacements which are determined by subtracting the rigidbody displacement from the total one. Validity and efficiency of present methodare confirmed.Chapter 4 : A finite element technique which enables to connect plateelements with a beam element is developed to analyze large displacement problemsof elasto-plastic thin-wal1ed beam-columns. The stiffness matrix is derived byusing multipoint constraints technique at the couplipg nodal point. Numericalresults of the present method are compared with the exact solutions and experimentalresults.Chapter 5 : Ultimate strength behaviors of elasto-plastic thin-walled H-sectionstub-columns are studied experimentally and theoretically. Seven specimens with various width-to-thickness ratio of the component plates of the cross section are tested under uni-axial compression. The test results are compared with the results of nonlinear analysis by the developed finite element method. Validity and efficiency of the present method are shown. Based on the test results, an interaction formula for predicting the ultimate strength. of H-section stub-column under axial compression is proposed.Chapter 6 : The interaction behavior of the local and overall buckling ofwelded thin-walled H-section columns are studied experimentally. A total of 13specimens with various slenderness ratios and width-to-thickness ratios of thecomponent plates are tested under axial compression. The AISC form factor methodfor predicting the ultimate strength of H-section columns is revised for thosecomposed of plates with large width-to-thickness ratios. The predictions of therevised method are found to give fairly accurate results for the columns tested.Chapter 7 : Based on the analytical and experimental stduy, an designformula of the local and overall interaction strength of compression members isproposed. The applicability of the formula is examined in comparison with thenumerical results.Chapter 8 : The conclusions obtained from chapters 2 through 7 are summarized

名古屋大学博士学位論文 学位の種類 : 工学博士(論文) 学位授与年月日 : 昭和61年12月25日

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  • NII論文ID(NAID)
    500000008081
  • NII著者ID(NRID)
    • 8000000008081
  • 本文言語コード
    • jpn
  • NDL書誌ID
    • 000000172395
  • データ提供元
    • 機関リポジトリ
    • NDL ONLINE
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