P-Δ效应的简化计算

Simplified calculation of P-Δeffect

受压构件在受载之后会产生形变Δ,该形变会使轴力P在构件上产生附加的弯矩P·Δ。考虑这种形变对构件的影响也称为二阶理论,俗称P-Δ效应。P-Δ效应在受压构件中普遍存在,但计算比较复杂,文中介绍了一种P-Δ效应的简化计算方法。

The compressed member is prone to deformation A under load, which makes the axial force P produce an additional bending moment P Δ on the member. Influence on the member from deformation is also called the second-order theory, also known as P-Δ effect. Such effect is common in compressed members, but its calculation is very complicated. To make such calculation easier, the paper presents a simplified method.