客运专线32m双线整孔简支箱梁张拉应力试验研究  

Tension Stress Experimental Study of 32 m Simply Supported Double-Track Box Girder in Passenger Dedicated Rail Line

作　　者：李士元 

机构地区：[1]中铁十二局集团第三工程有限公司,山西太原030024

出　　处：《石家庄铁道大学学报（自然科学版）》2014年第1期24-30,共7页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

摘　　要：为得到力筋放张后客运专线32 m双线整孔简支箱梁的真实应力状态,现场进行了张拉应力测试,主要测试跨中截面应力分布、1/4断面顶板的剪力滞效应及端块锚下横向应力。由于初等梁弯曲理论具有一定的局限性,故借助ANSYS软件计算张拉应力的精确值,并将二者的计算结果与实测值进行分析比较,对梁体设计的安全性与可靠性进行评价,为32 m简支箱梁的预应力优化设计积累技术资料。In order to acquire true stress behavior of 32 m simply supported double-track box girder in passenger dedicated rail line after releasing steel wires, a tension stress test was done on the site and the section stress distribution on midspan, the shear lag effect on a quarter of span and vertical stress under the anchor are measured. While primary beam bending theory has some limitations, a finite element model was established by using ANSYS in order to get the exact value. Structural security is evaluated by comparing and analyzing the two calculation results and measured values, which provides technical data for prestress optimization design of 32 m simply supported double-track box girder.

关 键 词：客运专线 简支箱梁 张拉应力 试验研究 有限元 ANSYS 

分 类 号：U441.17[建筑科学—桥梁与隧道工程]