中间支座截面受拉区的位置随着跨高比的减小而下移；
The position of tensile region of the section at mid-supports goes down as the span-depth ratio reduces.
混凝土翼板处于受拉区，受力复杂，需要进一步研究。
Concrete slab was tensioned, and complex situation was researched deeply.
在受拉区表面粘贴加强片是加固混凝土梁的一种有效方法。
Bonding a strengthening plate to the tension face is an effective technique to repair reinforced concrete beams.
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