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所谓明槽配筋多跨连续折线预应力,就是沿结构轴线的板与板(或梁与梁,梁与板)之间的明槽内设置多跨连续折线预应力配筋,施加预应力后浇筑混凝土而形成结构。折线应力筋在支座(柱)处居于中和轴的上部,在跨中则居于中和轴的下部,与结构在垂直荷载作用下的弯矩图形状接近,因而受力合理,比采用水平直线形式的预应力配筋能够节省钢材和扩大结构的柱网尺寸。
The so-called open groove prestressing of multi-span continuous folding line is to set the multi-span continuous folding line pre-stressing reinforcement in the open slot between the plate and the plate (or beam and beam, beam and plate) along the structural axis, after prestressing Concrete is poured to form a structure. The stress-relief ribs of the fold line reside on the upper part of the neutral axis in the support (column) and in the lower part of the neutral axis in the mid-span, and are close to the bending moment diagram of the structure under the vertical load. The linear form of pre-stressed reinforcement can save steel and expand the structure of the column net size.