双层均布荷载作用下混凝土悬臂箱梁抗弯性能试验研究

对大比例混凝土悬臂箱梁在弹性范围内的抗弯性能进行试验研究与分析,重点研究该混凝土悬臂箱梁的悬臂部分在双层均布荷载或单层均布荷载作用下,其荷载-挠度曲线、顶板纵向应变的横向分布情况以及顶板剪力滞系数的横向分布情况.研究结果表明：双层均布荷载或单层均布荷载作用下,支座截面处存在正剪力滞现象,离支座1/2悬臂长度截面处存在负剪力滞现象;荷载量级的增加对剪力滞系数没有影响;该混凝土悬臂箱梁在顶板均布加载作用下产生的剪力滞效应相对于其在顶板、底板同时均布加载作用下产生的剪力滞效应较为明显.

Double Cantilever Box Girder Under Uniform Load Concrete Flexural Performance Test Research

UIμAn experimental study and analysis of the large proportion double-deck traffic concrete box can- tilever girder with with reinforcement subjected to bend in elastic stage are done. The writer primarily re- searches the load-deflection curves, roof concrete strain distribution and lateral distribution of shear lag co- efficient under the effect of double-deck uniform load or single-deck uniform load. The results demonstrate that positive shear lag phenomenon exists in bearing section when it＇s under that effect of double-deck uni- form load or single-deck uniform load, and negative shear lag exists in the place from the one half of bearing section. The load＇s effect has no effect on shear lag; shear lag caused by the effect of roof uniform load is more distinct than that under both uniform loads on roof and floor.