采用积分法分段计算预应力张拉伸长值  

Using the piecewise integral method to calculate the prestressed tension value

作　　者：张伟华[1] 田丰 

机构地区：[1]兰州石化职业技术学院,甘肃兰州730060 [2]甘肃路桥建设集团有限公司,甘肃兰州730030

出　　处：《山西建筑》2017年第2期181-182,共2页Shanxi Architecture

摘　　要：以某预制箱梁为例,分析了预应力N1、钢束在水平面和立面的投影,采用积分的方法,对预应力中张拉伸长值进行了分段计算及分析,指出该计算方法有助于准确计算伸长值,避免误差,提高精度,且对提高和控制预应力施工的质量具有一定的意义。Taking some forecast box girder as the example,the paper analyzes the prestress N1 steel cable＇s projection in the horizontal and vertical planes,adopts the integration to undertake the piecewise calculation and analysis of the tension pulling elongation in the prestress,and points out the calculation method can assist the accurate calculation of the elongation,avoid the errors and improve the accuracy,so it is meaningful for improving and controlling the quality of the prestressed construction.

关 键 词：预制箱梁 预应力 伸长量 积分 精度 

分 类 号：U442[建筑科学—桥梁与隧道工程]