桥梁工程中小偏心受压构件相对受压区高度的精确计算方法

A Precise Algorithm for the Relative Depth of Compressive Zone about The Compression Member with Small Eccentricity in Bridge Engineering

通过对JTG D62-2004《公路钢筋混凝土及预应力混凝土桥涵设计规范》中小偏心受压构件相对受压区高度计算方法的分析,认为运用现规范方法计算出的小偏心受压构件相对受压区高度在很多的情况下均与实际的小偏心受压构件相对受压区高度有较大的误差,这种误差将导致小偏心受压构件的配筋结果偏大或偏小.提出了一种简便的小偏心受压构件相对受压区高度的较精确计算方法,以期能使小偏心受压构件的配筋设计经济合理.

Based on an analysis of the calculation methods for the relative depth of compression zone about the eompression member with small eccentricity as regulated in Code for Design of Highway Reinforced Concrete and Pre-stressed Concrete Bridges and Culverts （JTG D62-2004）, the paper proves that the relative depth obtained by the design code has a large error, compared with the actual one in many situations, and it usually leads to some more or less requirement of the member＇s reinforcement. For the member＇s reinforcement design to be more economic and reasonable, the paper proposes a simple and precise hlgorithm to calculate ：the Concerned relative depth.