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本文是笔者对不同预应力度的部分预应力混凝上梁长期荷载下挠度和裂纹开展作连续27个月、对不同含筋量混凝土试件收缩、徐变作连续24个月观测记录,根据大量数据分析后获得的成果之一。该成果于1990年12月经交通部科技成果鉴定通过。
In this paper, the author conducts consecutive 27-month observations of the deflections and cracks of partial prestressed concrete upper beams under different prestressing degrees for a continuous 27-month period, and the continuous 24-month observation records of the shrinkage and creep of concrete specimens with different ribs content. One of the results obtained after analyzing a large amount of data. This achievement was approved by the Ministry of Communications in December 1990.