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现用的装配式T梁标准图,结构简单,断面较小,便于制作和安装,各地采用甚广。其桥面板为悬臂结构,板底为一斜直线,厚度从8～12厘米,以根部12厘米控制设计。模板制作是简化了,但由于并没有按等强度梁的概念来考虑板断面的选择,因此也就免不了有一些材料上的浪费。悬臂结构的弯矩图,是一个凹形抛物线,其弯矩在支点处激增。合乎理想的断面应该是:既符合结构上、施工上的要求,也符合受力的规律。今试算了一下,根据弯矩图曲线斜率的变化、剪力和最小结构尺寸的要求,将断面变为双折线的或在肋部加承托的形式,每米桥长桥面钢筋即由三号钢φ12毫米十一根减至八根。因此如以净-6计,每米桥
The existing assembled T-beam standard diagram, simple structure, smaller cross section, easy to make and install, widely used throughout. The bridge deck is cantilever structure, the bottom of a slanting straight line, the thickness of 8 to 12 cm, 12 cm root to control the design. Template production is simplified, but some material waste is inevitable because the choice of plate cross-section is not accounted for by the concept of isometric beams. The moment diagram of a cantilever structure is a concave parabola with a sharp increase in moment at the fulcrum. Ideal section should be: not only in line with the structural requirements of the construction, but also in line with the law of force. Now try a bit, according to the bending moment curve curve changes in slope, shear and minimum structural size requirements, the section into a double broken line or in the ribs plus support form, every meter long bridge deck steel by Three steel φ12 mm eleven reduced to eight. So as net-6 meter, every meter bridge