稳定车流荷载下装配式梁桥静力效应分析研究  

Analysis and Research on Static Effect of Assembled Beam Bridge Under Steady Traffic Load

作　　者：王宏涛[1] WANG Hongtao(The Fifth Engineering Co.,Ltd.of China Railway 18th Bureau Group,Tianjin 300450,China)

机构地区：[1]中铁十八局集团第五工程有限公司,天津300450

出　　处：《山西师范大学学报（自然科学版）》2023年第3期53-58,共6页Journal of Shanxi Normal University(Natural Science Edition)

摘　　要：交通流荷载引起的桥梁结构活荷载效应大,研究组合梁桥在统计稳定交通流荷载作用下的应变和挠度,可以揭示结构的静力效应和动力响应规律,进而评价结构的使用性能.采用先进的桥梁结构健康监测技术,对交通流荷载参数进行采集和分析.首先,根据交通流荷载模型中各参数的概率分布函数,综合统计稳定的交通流荷载,应用简化的桥梁力学模型;其次,利用方差和相对熵来判断静态效应的期望、方差和概率密度函数的统计稳定性.最后,分析了静力效应达到统计稳定状态时全桥面预制梁在不同位置的静力效应期望、方差和概率密度函数的演化规律.The live load effect of bridge structure caused by traffic flow load is large.Studying the strain and deflection of composite beam bridge under the action of statistically stable traffic flow load can reveal the stat-ic effect and dynamic response law of the structure,and then evaluate the service performance of the structure.This paper adopts advanced bridge structure health monitoring technology to collect and analyze traffic flow load parameters.First,according to the probability distribution function of each parameter in the traffic flow load model,the stable traffic flow load is comprehensively counted,and the simplified bridge mechanical model is ap-plied;Secondly,the expectation,variance and statistical stability of probability density function of static effect are judged by variance and relative entropy.Finally,the evolution laws of static effect expectation,variance and probability density function of precast beams at different locations are analyzed when static effect reaches statisti-cal steady state.

关 键 词：装配式梁桥 交通流荷载 静态效应 统计规律 

分 类 号：U44[建筑科学—桥梁与隧道工程]