摘要
基于悬臂板假定和无剪切刚性板假定,建立两种空心板桥加宽刚度渐变理论计算模型,并分别根据这两种模型计算得出了新旧桥板之间刚度渐变初步方案。通过跨中位移和横向分布影响系数分析来评价加固效果:综合考虑跨中和1/4跨,悬臂板假定下采用槽钢进行刚度渐变的过渡空心板位移变化有渐变趋势,说明这种假定与实际情况相近,可以作为理论假定的依据,可以采用悬臂板假定进行计算。
Based on the supposition of cantilever slab and shear-free rigid plate, two calculation models of gradual change of the stiffness of hollow slab bridge widening are established, and then a preliminary scheme of gradual change of the stiffness between the old and new bridges are obtained according to the models. Through analyzing the mid-span displacement and influence coefficient of transverse distribution, the effect of reinforcement is evaluated： considering mid span and 1/4 span synthetically, the displacement of transitional hollow slab using channel steel to realize gradual change of stiffness under the supposition of cantilever slab has the trend of gradual change, which indicates that the suspension closes to the actual situation, however it can be used as basis of theoretical suspension and the suooosition of cantilever slab can be used in calculation.
出处
《交通标准化》
2011年第24期108-111,共4页
Communications Standardization
关键词
空心板桥
加宽
刚度
关键技术
hollow slab bridge
widen
stiffness
key technology
