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钢筋混凝土圆端形截面在斜偏心受压时的应力计算是较繁杂的。以往在桥梁等设计中遇到此类问题时,只能用近似方法分别以单方向对称截面偏心受压计算,误差较大。本文利用有限单元法和最优化设计原理来计算,精度较高,符合实用。此法不仅可用于钢筋混凝土实体或空心圆形、圆端形截面的斜偏心受压及双向弯曲应力计算,并可用于同样截面的素混凝土或其它石砌圬工的斜偏心受压应力重分布计算。对于 T 形、工字形等其它各种形式截面,本计算方法原理同样适用。一、计算原理(一)应力图式及静力平衡方程式在我国铁路桥梁设计中,混凝土和钢筋混凝土设计采用
Reinforced concrete circular cross section in the oblique eccentric stress calculation is more complicated. In the past, in the design of bridges and other such problems, only approximate methods can be used to calculate the eccentric compression of the unidirectional symmetric section with larger error. In this paper, using the finite element method and the optimal design principle to calculate, high accuracy, in line with practical. This method can be used not only for the calculation of diagonal eccentric compression and biaxial bending stress of reinforced concrete or hollow circular and round end cross sections but also for diagonal eccentric compressive stress redistribution of plain concrete or other stone masonry with the same cross section Calculate. For T-shaped, I-shaped and other various forms of cross-section, the same principle of this calculation method. First, the calculation principle (A) stress patterns and static balance equations in China’s railway bridge design, concrete and reinforced concrete design