鋼構造骨組におけるはり端の歪度と層変形量の関係について  [in Japanese] ON THE RELATIONS BETWEEN THE DUCTILITY FACTOR OF THE BEAM FLANGE NEAR THE CONNECTION AND THE DUCTILITY FACTOR OF STEEL FRAMES  [in Japanese]

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Author(s)

Abstract

In steel frames, the fracture of welded parts must be prevented when the frames are subjected to large lateral displacement during the strong earthquakes. On this point of view, it is very important to clarify the magnitude of the strain in the beam flange near the connection under earthquakes. In this paper are investigated the relations between the ductility factor of the beam flange near the connection based on strain (e_b) and the ductility factor of the frame based on lateral displacement (μ), using the numerical method. As the result the simple and available e_b-μ equations are presented. The results are shown as follows. (1) e_b-μ relations can be estimated rationally by analyzing the two relations i. e. e_b-ξ_b relation and ξ_b-μ relation, where ξ_b is the ductility factor of the beam-end based on rotational angle. (2) e_b-μ relations under monotonically increasing lateral displacement are expressed in terms of the parameters on material (stress-strain) properties and of the ratio of the beam's bending component to the total lateral displacement in the elastic region. (3) e_b-μ relations under cyclic lateral displacement are much affected by the cyclic displacement history. Nevertheless, the following two values can be easily evaluated in engineering practice, using the monotonic e_b-μ relations. The one is the maximun value of e_b for the maximum ductility factor of the frame, and the other is the amplitude of e_b under cyclic lateral displacement with constant amplitude.

Journal

  • Transactions of the Architectural Institute of Japan

    Transactions of the Architectural Institute of Japan 301(0), 53-64, 1981

    Architectural Institute of Japan

Codes

  • NII Article ID (NAID)
    110003881792
  • NII NACSIS-CAT ID (NCID)
    AN0018882X
  • Text Lang
    JPN
  • Article Type
    journal article
  • ISSN
    0387-1185
  • NDL Article ID
    2308797
  • NDL Source Classification
    NA31(構造設計)
  • NDL Source Classification
    ZN1(科学技術--建設工学・建設業)
  • NDL Call No.
    Z16-107
  • Data Source
    NDL  NII-ELS  J-STAGE  AIJ 
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