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设计桥梁墩台的基底式样与尺寸时,应该符合桥涵设计规范第§356条之规定。在直线上,只受单向挠曲,已列有明确的计算公式,但在曲线上,受到双向挠曲时,应如何计算,没有说明。下面想谈谈这个问题,不正确时,请大家指正。一、截面核心半径“ρ”的计算设有一任意截面,如右图。O点为截面形心,其二主轴分别为x与y轴,垂直力N的偏心为e,其方向角为按核心半径系指全截面均受压应力,但最少有一点应力为零时的外力合力的偏心,此时e=ρ。所以如取
When designing the basement pattern and size of bridge abutments, the requirements of §356 of the code for design of bridges and culverts should be complied with. In the straight line, only by one-way deflection, a clear formula has been listed, but in the curve, by two-way deflection, how to calculate, did not say. Below to talk about this issue, not correct, please correct me. First, the cross-section core radius “ρ” calculation with an arbitrary cross-section, as shown on the right. O point is the centroid of the section, the two major axes are the x and y axes respectively, the eccentricity of the vertical force N is e, and the direction angle is the core radius by which the full cross-section is under compressive stress but at least one little stress is zero External forces together eccentric, this time e = ρ. So take it