Kou kouzou rombunshuu
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ONLINE ISSN: 1884-0329
PRINT ISSN: 1880-9928

Kou kouzou rombunshuu Vol. 3 (1996), No. 12

  • Structural Performance and Desigh Methods of the Truss - Frame Using Stressed H - Shape Steel

    pp. 1-12

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    DOI:10.11273/jssc1994.3.12_1

    A recent innovative development was introduced in Japan by Strarch International Ltd., Australia. The unique feature of this structural sysetm is the way in which a prestressing cable passing through the bottom chord of the truss is stressed so that predetermined gaps in the bottom chord close to allow the chord to shorten, thus producing upward curvature of the truss into on arch shape. But the top chord sections are restricted to cold-formed square hollow sections. Its sections have not enough variation to be selected suitably and it is difficult to obtain to time in Japan. So we thought of extending the steel sections to H-shape-steel. This paper describes loading tests, parametric analyses and design methods of the truss-frame composed of stressed H- shape- steel.
  • Ultimate Strength of Deck Arch with Continuous Stiffening Girder

    pp. 13-20

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    DOI:10.11273/jssc1994.3.12_13

    This paper is concerned with the ultimate strength of deck arch with continuous stiffening girder. Three analytical models designed same as actual bridges are considered and the ultimate load is calculated by means of the elasto-plastic and finite displacement analysis. This paper also refers to the relationship between the ultimate load and the initial yielding load through the elastic and finite displacement analysis in order to investigate the ultimate strength in the practical bridge design work.
  • Applicability of Notinal Load - Plastic Hinge Analysis to Structural Design of Steel Frames

    pp. 21-30

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    DOI:10.11273/jssc1994.3.12_21

    Plastic hinge method inherently assumes the elastic-perfectly plastic momentcurvature relation which results in unconservative strength of the frame. A gradual spread of plasticity in members is not considered. To fill this lack and include the effects of initial imperfections, the fictitious (notional) horizontal force is applied. It is assumed to be proportional to the gravity loads so that the stability of the frame can be assessed with improved accuracy. The present paper compares the strength and behaviors of frames between the plastic hinge-notional force analysis and the more exact analysis and concludes that this design method is most practical and useful.
  • An Experimental Study on the Shear Strength of Anchor Bolts Embedded in Concrete

    pp. 31-38

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    DOI:10.11273/jssc1994.3.12_31

    We made trial products, they've parameter of the concrete strength and the edge distance mainly, on base concrete to each of anchor bolts (13φ-56φ) embedded in concrete. We made an experiment that the each of trial products received shearing force action. Consequentely we supposed two empirical equation. One is the equation on maximam shear strength of anchor bolts and the other is the equation on minimum edge distance of base concrete, when anchor bolts are filled with shear resistance. We'll report on the result.
  • Simplified Procedure for Estimation of Degree of Imperfection in Incomplete Composite Beam with Fixed Ends

    pp. 39-45

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    DOI:10.11273/jssc1994.3.12_39

    The objective of this paper is to propose a simplified procedure for estimating the degree of imperfection in the incomplete composite beam with fixed ends under the uniform load. The degrees of imperfection concerning the longitudinal force, horizontal shearing force, deflection and the moment inertia of the section of the beam are estimated by using the logarithms plot between the rigidity of shear connectors and the parameter composed of the sectional properties and the beam span, which is derived by solving the differential equation of the incomplete composite beam.
  • Experimental Study on CollapseMode of Frame and Elasto - Plastic Behavior of Weak Joint Panel Composed of H - section Steel Member with Reinforced Concrete Floor Slab

    pp. 47-59

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    DOI:10.11273/jssc1994.3.12_47

    The experimental results of the elasto-plastic and Collapse behavior of steel subassemblage with weak joint panel and with reinforced concrete floor slab on beam under seismic loading are discussed. The main purpose in this paper is to make the Collapse mode of steel frame clear in the relation of strength between joint panel and beam. The some conclusions herein are summarized as follows. (1) In the range α>0.7, defined as panel-beam yield strength ratio α, beam-Collapse mode appeared, (2) frame with smaller α values than around 0.4 became panelCollapse, (3) in 0.4< α<0.7, simultaneous Collapse both in panel and in beam was supposed.

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