公路桥梁限载标准安全性分析  

Security analysis on truck weight limits standard at highway bridges

作　　者：潘腾飞[1] 李松辉[1] 王彦伟[1] 

机构地区：[1]山东科技大学土木工程防灾减灾重点实验室,山东青岛266590

出　　处：《河北工程大学学报（自然科学版）》2016年第1期57-61,66,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：中国博士后科学基金项目(2013T60681);山东省交通科技创新计划项目(2010Y01-2)

摘　　要：以山东省某预应力混凝土空心板桥为依托,系统验证已有桥梁限载分析模型的工程安全性。首先,根据该桥结构设计资料,按《公路钢筋混凝土及预应力混凝土桥涵设计规范》设计汽车荷载进行承载能力检算,验证桥梁是否达到设计要求;在此基础上,针对不同的限载安全等级,按设计采用的车辆横向布载模式,计算典型限载车辆荷载作用下的荷载效应与跨中挠度;与设计汽车荷载产生的荷载效应和跨中挠度进行对比,检验所提限载取值对该类桥梁的工程安全性。计算结果表明,与安全等级一级和二级对应的典型限载车辆,可以满足安全等级一级、二级和三级的承载能力要求;与安全等级三级对应的典型限载车辆,可以满足安全等级一级、二级和三级的正截面承载能力要求,但不能满足安全等级一级的斜截面抗剪承载力要求。Based on a pre-stressed concrete hollow slab bridge which located in Shandong province,the engineering security of truck weight limits model on highway bridges was verified systematically.Firstly,the bridge of carrying capacity is checked to verify the bridge weather meet the design requirements by according to the bridge design data and the design of truck weight of 2004 code. Then,the load effect and the deflection of mid-span of bridge in different typical truck of weight limits were calculated by according to the design of the truck lateral load patterns aiming at different safety classes,respectively. And the data were compared with the design of truck weight to verify the engineering security of truck weight limits on highway bridges. The results indicate that,when the safety class of bridge truck weight limit were class one and class two,the corresponding typical truck of weight limits can satisfy the carrying capacity requirements of class one,class two and class three. when the safety class of bridge truck weight limit were class three,the corresponding typical truck of weight limits can satisfy the carrying capacity of normal section requirements of class one,class two and class three,but hardly satisfy the carrying capacity of cross section requirements of class one.

关 键 词：预应力空心板桥 桥梁限载 典型限载车辆 极限状态 安全性分析 

分 类 号：U411[交通运输工程—道路与铁道工程]