偏心受压构件计算方法存在的问题及改进

为了进一步完善偏心受压构件的计算方法,在回顾偏心受压计算发展过程的基础上,指出了现行规范计算方法存在的问题与不足,提出了偏心受压的统一计算模式。统一计算模式是在引入平截面假定和材料应力—应变关系的基础上,以截面实际受压区高度为主要参数,建立截面的力矩平衡方程,从而求得构件的承载能力。通过实际算例与现行规范计算方法进行比较,验证了统一计算模式的精确性和可靠性。统一计算模式扩展了偏心受压计算适用的范围,使偏心受压的计算公式能够与受弯构件和轴心受压构件的计算衔接起来,完善了偏心受压计算的理论体系。

Existing problems and improvement of the calculation method of eccentric compression members

In order to improve the calculation method of eccentric compression members,based on the review of development of eccentric compression member calculation,some existing problems of the current codes were indicated.And a unified calculation model for eccentric compression member was presented.Taking the height of actual compressive zone as main parameters,a cross-section moment equilibrium equation was established based on the plane section assumption and the constitutive relation of material.Then,the bearing capacity of the member was obtained by solving the equation.The accuracy and reliability of the unified calculation model was validated by comparing the calculated results with those from the practical examples.The unified calculation model extend the applicable scope of eccentric compression calculation.The formula for eccentric compression connects the calculations of flexural members and axial compression members,and the theory of eccentric compression calculation is improved.