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鋼構造論文集 Vol. 3 (1996), No. 12

ISIJ International
belloff
オンライン版ISSN: 1884-0329
冊子版ISSN: 1880-9928
発行機関: Japanese Society of Steel Construction

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鋼構造論文集 Vol. 3 (1996), No. 12

湾曲したH形鋼を上弦材としたトラス梁の構造性能と設計方法

高橋 茂治, 古賀 靖広

pp. 1-12

抄録

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.

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湾曲したH形鋼を上弦材としたトラス梁の構造性能と設計方法

補剛桁が連続桁形式である上路式補剛アーチの耐荷力解析

高森 博之, 大森 邦雄

pp. 13-20

抄録

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.

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補剛桁が連続桁形式である上路式補剛アーチの耐荷力解析

疑似水平カー塑性ヒンジ解析法の鋼骨組構造設計への適用性

当麻 庄司, 高松 潤, 三田村 大松, 黒田 保博

pp. 21-30

抄録

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.

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疑似水平カー塑性ヒンジ解析法の鋼骨組構造設計への適用性

埋込みアンカーボルトのせん断耐力に関する実験的研究

河野 久夫, 橘 俊明, 増田 貫志

pp. 31-38

抄録

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.

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埋込みアンカーボルトのせん断耐力に関する実験的研究

両端固定合成梁の不完全度の簡易推定法について

中島 章典, 溝江 慶久

pp. 39-45

抄録

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.

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両端固定合成梁の不完全度の簡易推定法について

鉄筋コンクリート床スラブを有するH形鋼接合部パネルの弾塑性変形性状および骨組崩壊モードに関する実験的研究

河野 昭雄, 阿世賀 宏, 長谷部 廣行

pp. 47-59

抄録

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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鉄筋コンクリート床スラブを有するH形鋼接合部パネルの弾塑性変形性状および骨組崩壊モードに関する実験的研究

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