鉄骨柱・合成梁接合部におけるコンクリートスラブの支圧・せん断耐力に関する研究

概要

論文の詳細を見る
When the framed, structures are subjected to earthquake loading, both positive and negative, bending moments act on composite beams as shown in Fig.1. The positive bending strength of the composite beam is mainly affected by the value of compressive force in the slab. At the beam- to-column connection, the compressive force in the slab keeps in equilibrium with the bearing stress and shear stress as illustrated in Fig.2. Therefore, the ultimate compressive force in the slab is limitted by the bearing strength at the column face and the shear strength at the column sides. In the case of the square tube (box) column, only the bearing stress balances with the slab compressive force. In this paper, theoretical expressions are developed for both bearing and shear strengths of concrete slabs at the beam-to-column connection. Theory of the concrete plasticity based on the mod- ified Mohr-Coulomb criterion is used in the analysis. To examine the theoretical expressions, three types of push out test specimens were considered : bearing tests, shear tests, and tests for combined bearing and shear. The principal variables are the thickness of slab, column width, and the shape of column section (H and box). Theoretical results are closely coinside with the corresponding test results. The most important conclusion obtained from the push out test is that the bearing strength and the shear strength are simply superposed. The positive bending strength of the composite beams calculated by using the theoretical ultimate compressive force in the slab is also compared with the test results. The strength of the composite beam connected to the H-shaped column is greater than that of the beam connected to the box column as predicted theoretically. This is due to the contribution of the additional shear resistance at the H-shaped column sides.
社団法人日本建築学会の論文
1990-05-30

鉄骨柱・合成梁接合部におけるコンクリートスラブの支圧・せん断耐力に関する研究

スポンサーリンク

概要

著者

関連論文

スポンサーリンク