| 種別 | Paper |
| 主題 | TEMPERATURE AND TENSILE STRESS PATH DEPENDENT MODELS FOR TENSILE STRENGTH OF CONCRETE |
| 副題 | |
| 筆頭著者 | Buja BUJADHAM |
| 連名者1 | Shusuke HARADA |
| 連名者2 | Koichi MAEKAWA |
| 連名者3 | |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 10 |
| 号 | 3 |
| 先頭ページ | 721 |
| 末尾ページ | 726 |
| 年度 | 1988 |
| 要旨 | 1. INTRODUCTION In the design of massive concrete structures nowadays, the precaution which gains much attention in designing procedures is the prevention of thermal crack initiation in concrete during the early period of construction cracking criterion of early age concrete, which is one of the important concerns in solving thermal cracking problems, was investigated in this study. In young concrete, hydration and sustained tensile stress history are two main factors affecting tensile strength. Hydration effect and sustained tensile stress history effect were separately clarified and mathematically modeled. Then, as the final step, the combined effects of the both were studied. Since temperature (directly affecting hydration) and sustained tensile stress in a concrete element in a structure keep varying in inconsistent manners, the models must be formulated by time i.e. having path dependent characteristics. 7. CONCLUSION Curing temperature path dependent model which can correctly predict tensile strength development in early age concrete subjected to an arbitrary curing temperature history was proposed. Also, tensile stress path dependent model to predict breaking point of concrete with no hydration subjected to sustained tensile stress was proposed and verified. The trend that sustained strength is higher than standard strength indicates of absolutely negative effects on strength of young concrete. |
| PDFファイル名 | 010-01-2128.pdf |