鋼管コンクリートにおける軸方向荷重伝達機構
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概要
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The purpose of this paper is to examine the mechanism of longitudinal load transfer between filled concrete and steel pipe. The load transfer mechanism consists of three factors: adhesion, friction, and mechanical interlocking. Mohr-Coulomb type criteria are used for expressing the strength of concrete and concrete-steel interface. The slip along the concrete-steel interface is simulated by axisymmetric finite element analysis with dual nodes. The load transfer capacity by mechanical interlocking is estimated by the calculation based on plastic equilibrium. The results of calculation are compared with full-scale model tests. Adhesion and friction are the major factors of load transfer when relative displacement is small. Mechanical interlocking transfers much larger load than the yield load by adhesion and friction. Mechanical interlocking, however, requires large displacement to mobilize the full capacity. Mohr-Coulomb type criteria are useful for expressing the shear strength of concrete and concrete-steel interface under confining stress.
- 一般社団法人日本建築学会の論文
- 1990-03-15