预应力混凝土
结构工程
大梁
工程类
材料科学
法律工程学
汽车工程
出处
期刊:Journal of Bridge Engineering
[American Society of Civil Engineers]
日期:2015-11-01
卷期号:20 (11)
被引量:12
标识
DOI:10.1061/(asce)be.1943-5592.0000764
摘要
AbstractMuch research has been conducted to study the dynamic impact of simply supported bridges due to vehicles moving at constant speeds, whereas only a few studies have focused on the impact due to vehicles changing speed on bridges. Previous numerical studies have shown that the impact factors due to vehicle braking may exceed those prescribed in the bridge design codes. However, most researchers adopted simple vehicle and bridge models that were not able to consider the spatial effect of real bridges and may have overestimated the actual impact factors due to vehicle braking. In this study, a three-dimensional vehicle–bridge coupled model was developed to study the dynamic impact factors of simply supported prestressed concrete girder bridges due to vehicle braking. Impact factors for different bridge responses were studied, including deflection, bending moment, and shear. The results showed that the impact factors due to vehicle braking could be notably larger than those due to the vehicles moving a...
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