摘要
由于整体化铺装加固后的空心板桥的铺装层较厚、横向整体性更突出,因此荷载横向分布系数的计算必须考虑整体化铺装层的影响。基于此提出采用广义梁格法考虑整体化铺装层的影响,在足尺模型试验和有限元计算的基础上,对基于广义梁格法的整体化铺装层加固后的空心板桥荷载横向分布系数计算方法进行验证。结果表明,广义梁格法的计算结果可以准确考虑采用整体化铺装层加固空心板桥的荷载横向分布规律。不同宽度、不同跨径的空心板桥,铺装层的高度折减系数取值在0.5~0.8之间时,计算结果更加精确。桥越宽则折减系数取值越大,跨径越大则折减系数取值越小。
Compared with the voided slab bridge with common deck pavement,the deck pavement of the voided slab bridge with integrated pavement is thicker,and the transverse integrity is more prominent.Therefore,the influence of integrated pavement must be taken into consideration in the calculation of the transverse load distribution factor.In this paper,the Generalized Grillage Method(GGM)is proposed to calculate the transverse load distribution factor of the voided slab bridge strengthened by integrated deck pavement.Based on the full-scale model test and finite element calculations,the transverse load distribution factor calculation method for voided slab bridges strengthened by the integrated pavement based on GGM is validated.The transverse load distribution factor calculation results indicate that GGM can precisely consider the transverse load distribution law of the voided slab bridges strengthened by integrated pavement.The different beam height reduction coefficients calculation and comparison with experimental and finite element results indicate that for voided slab bridges with different widths and spans,the calculation results are more accurate when the height reduction coefficient of the pavement layer is between 0.5 and 0.8.The wider the bridge,the larger the reduction coefficient value.The larger the span,the smaller the reduction coefficient value.
作者
王昊
李广奇
郭建民
黄宛昆
WANG Hao;LI Guangqi;GUO Jianmin;HUANG Wankun(Shandong Hi-speed Company Limited,Jinan,Shandong 250014,China;Shandong Transportation Institute,Jinan,Shandong 250101,China;College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350116,China)
出处
《水利与建筑工程学报》
2024年第3期149-157,共9页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金项目(51808126)
福州大学科研启动项目(XRC-23020)。
关键词
桥梁工程
空心板桥
荷载横向分布系数
广义梁格法
模型试验
有限元计算
bridge engineering
voided slab bridge
transverse load distribution factor
generalized grillage method
model test
finite element model calcu lation
