現場打設部を異種強度コンクリートで打ち継いだハーフプレキャスト梁の逆対称曲げ挙動を模擬する等価1自由度モデル

摘要

In this paper, a design model for structural behavior of half precast beams, composed of different concrete strength for the precast and the cast-in-place portions under antisymmetric bending load, has been proposed. The model is formulated based on the fact that has been achieved in both of the former experiments and of the former analysis about this kind of half precast beams, and aimed at being applied to the existing design method. Furthermore, there have been also developed two kinds of simplified models to approximate the answer derived from the original model more briefly.rnIn order to validate suitability of the present models, it is examined whether the models show sufficient agreement with the results of the former experiments or not. And moreover, sensitivity analyses of parameters in the models are also tried. And these investigations result in that those proposed models have sufficient suitability and make it possible to evaluate the behavior of this kind of half precast beams under the existing design method without special complicated treatments.%本論文では、「現場打設部に　PCa　部とは異なる強度のコンクリートを打ち継いだハーフ　PCa　梁」について、既往の実験二川および解析的検討より見出されたこの種のハーフ　PCa　梁に顕著に見られる「反曲点の移動」に立脚して、その構造的な挙動を設計実務に則して模擬する手法の構築を試みた。