| 種別 | Paper |
| 主題 | ANALYSIS OF BEAMS WITH SHEAR REINFORCEMENT BY FINITE ELEMENT METHOD |
| 副題 | |
| 筆頭著者 | Nares PANTARTORN（Tokyo University） |
| 連名者1 | Tamon UEDA（Hokkaido University） |
| 連名者2 | |
| 連名者3 | |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 13 |
| 号 | 2 |
| 先頭ページ | 1021 |
| 末尾ページ | 1026 |
| 年度 | 1991 |
| 要旨 | INTRODUCTION There have been many researches relating to shear problems of reinforced concrete beams through the experimental works and analytical methods. Considering time and the latter is preferable. There has been developed a two dimensional finite element program with the constitutive laws of micro-mechanical models in reinforced concrete such as concrete tension stiffening model, model of stress transfer at crack, deformational model of concrete and model of reinforcing bar in concrete. Although this program can be applied to shear walls but cannot predict well behavior of beams in shear under cyclic loadings. The differences in micro-mechanical modeling between shear walls and beams, such as effect of anchorage slip of stirrup, have to be taken into consideration. In this paper the micro-mechanical model for concrete tension stiffening of a beam is proposed through numerical analysis, considering the effect of anchorage slip. The model for stress transfer at crack which was derived from the condition of constant crack width path is modified, considering the analytical model for variable crack width path which was observed in the experiment. The computed shear reinforcement stresses are compared with the experimental ones. CONCLUDING REMARKS The finite element analysis program for shear walls is modified in order to be applied to beams. The modification is conducted on (1) concrete tension stiffening model considering stirrup slip at lower bend and (2) stress transfer model at crack considering difference in typical crack deformation path between shear walls and. beams. The modified finite element analysis program predicts well relationships between applied shear force and stirrup stress for stirrups at different locations in. beams under cyclic loading and indicates uniform diagonal concrete compressive stress stress flows with an inclination about 30` in a shear span. |
| PDFファイル名 | 013-01-2174.pdf |