温度效应对钢箱梁应力变化规律影响分析

Research on the Temperature Effect on the Stress of Steel Box Girder Based on Intelligent Monitoring System

为探究温度效应对钢箱梁受力与变形的影响规律,本文以某钢箱梁竣工但尚未通车状态下的温度与应力监测数据为实际工程背景,探究温度效应对应力的影响,发现上顶板的日温度变化较大,下底板温度变化较小,且温度变化与上顶板应力变化成正相关,与下底板成负相关,结果表明温度变化产生的结构应力变化不容忽视,可为后续拟合并得到温度效应对应力影响的经验公式提供参考。

In order to explore the influence law of temperature effect on steel box girder stress and deformation,the influence of temperature effect on the stress was studied in the practical engineering.It was found that the temperature change was bigger on the roof,and the underside temperature change was smaller.Moreover,the relation temperature change and stress change was positive correlation on the roof,whereas the underside was negative.The results show that the temperature changes of structural stress should not be ignored.This study could offer reference to the experience formula of the temperature effect on the stress influence.