For single span beam or interior span beam of prestressed concrete frame, a simplified method for calculating secondary moment was developed. A parabola was used instead of real prestressing steel bar shape in this method. The method is easy and the result is accurate. 对于单跨预应力混凝土框架梁和多跨预应力混凝土框架的内跨梁,通过位移法证明了用一定矢高的单波抛物线代替实际预应力筋进行次弯矩的计算,方法简单,结果准确。
The computing method of single span wall beam without hole 单跨简支无洞口墙梁内力计算方法
As prestressed wire prolongs multispan and multiwave, the loss of prestress due to friction between the wire and hole is more server than in single span beam. 多跨预应力梁的预应力索由于超长、多波,因而与孔道壁之间的摩擦引起的预应力损失就较单跨梁中的损失要严重,而且摩擦损失将占总的预应力损失的绝大部分。
An oblique curved beam with single span and non-radial bearing is analyzed, formulae are derived for calculating the internal force of the beam under 4 typical loads. Program used in the project is created based on the formulae. 对单跨非径向支承斜交曲线梁进行分析,导出了其在4类典型荷载下的内力计算公式,据此可编制用于工程实际的计算程序。
This article gives an introduction to the design of single span partially prestressed frame beam with 39 7m length in the training hall of Shandong Sports Technology Institute. 介绍了山东省体育运动技术学院3层跨度为397m单跨部分预应力混凝土框架梁的设计计算情况。
The stress and strain in the top and bottom surfaces of simple supported single layer beam increase with the increase of beam span under self-gravity effect. The span limit increases with the increase of the beam strength and thickness. 试验结果表明:简支的单层岩梁在自重作用下上下表面的应力、应变随梁的跨度增加而增加;梁的极限跨距随梁的强度及厚度增加而增加。