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Experimental study on early autogenous shrinkage of 20m-span low-height reactive powder concrete T-beam

机译:20m跨度低高度活性粉末混凝土T形梁早期自收缩试验研究

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Steel string strain gauges are pre-embedded in ten pieces of 20m-span low-height reactive powder concrete(RPC) T-beam to test the changing law of early shrinkage along the height of T-beam's section. According to this law, self-restraint stress which comes out of uneven shrinkage of RPC, and easy cracking dangerous areas which are caused by self-restraint stress, are both analyzed. Then S.Miyazawa & T.Kuroi & E.Tazawa autogenous shrinkage model is adopted to do regression analysis, obtaining certain parameters and the autogenous shrinkage strain-time curves of top slabs, webs and base plates.
机译:将钢弦应变仪预埋在十块20m跨度的低高度活性粉末混凝土(RPC)T型梁中,以测试T型梁截面高度上的早期收缩率的变化规律。根据该定律,分析了由于RPC收缩不均匀而产生的自约束应力,以及由自约束应力引起的易开裂危险区域。然后采用宫泽S.Kuroi和E.Tazawa的自发收缩模型进行回归分析,获得一定的参数以及顶板,腹板和底板的自发收缩应变-时间曲线。

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