连续空心板满足承载能力要求的弯矩调幅限值研究  

Study on Moment Modification Limited Value of Tubular Hollow Continuous Slab Considering Bearing Capacity Requirement

作　　者：杨伟军[1] 张振浩[1] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410076

出　　处：《公路交通科技》2010年第6期79-84,90,共7页Journal of Highway and Transportation Research and Development

基　　金：国家高技术研究发展计划(八六三计划)子项目(2002AA001015-01)

摘　　要：试验与理论结合,研究了圆管式空心连续板的塑性内力重分布性能与弯矩调幅限值问题。首先,进行了4块大比例尺的2跨连续板加载试验,实测了圆管式空心连续板在进入塑性状态后的塑性铰区长度与塑性铰转动能力等问题。然后,在试验研究基础上从理论上分析了圆管式空心连续板在固定荷载下满足承载能力要求的弯矩调幅限值问题。试验研究表明,在16.5%～30.7%的调幅幅度下圆管式空心连续板均能达到完全的内力重分布,而理论计算表明圆管式空心板的极限弯矩调幅值将达35.65%。通过试验与理论的综合研究,表明了这种类型的连续板具有良好的塑性内力重分布性能与较高的弯矩调幅限值。The redistribution behavior of internal plastic force and the moment modification limited value of tubular hollow continuous slab were studied through experiment and theoretical analysis.First,loading experiment of four large scale two-span continuous slab was performed to measure the length and the rotational capacity of plastic hinge of the tubular hollow continuous slab in the plastic stage.Then,based on the experiment,the moment modification limited value of the tubular hollow continuous slab that meets the requirement of the bearing capacity under a given load was analyzed.It shows from the experiment that the tubular hollow continuous slab can develop full internal force redistribution under the moment modification values of 16.5%～30.7%.And the theoretical calculation shows that the moment modification limited value of tubular hollow slab will be 35.65%.The research shows that the tubular hollow continuous slab has good performance of redistribution of internal plastic force and its moment modification limited value is higher.

关 键 词：桥梁工程 圆管式空心板 试验与理论 弯矩调幅限值 内力重分布 塑性铰 

分 类 号：U441[建筑科学—桥梁与隧道工程]