水泥混凝土桥面粘结层抗剪性能要求及简化计算  

Shear property demands of binding layer on concrete bridge pavement and simplified calculation

作　　者：顾兴宇[1] 王文达[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《交通运输工程学报》2010年第2期20-25,共6页Journal of Traffic and Transportation Engineering

基　　金：江苏省交通科技项目(8821006014)

摘　　要：通过有限元方法,分析了不同类型桥面防水粘结层的受力特点及其剪应力对铺装层各种参数（包括厚度、模量、水平荷载及胎压等）的敏感性,得到了粘结层剪应力角度变化范围,提出了桥面粘结层的抗剪强度要求计算公式。通过变化室内斜剪试验剪切角度（25°~65°）,得出了剪切角度变化时粘结层抗剪强度随温度变化的规律。研究结果表明：桥面铺装厚度和水平荷载是影响层间剪应力与剪切角度大小的主要因素,粘结层材料的抗剪性能随着温度和剪切角度的增大迅速降低,具有一定厚度的低模量防水卷材粘结层对铺装层抗剪是不利的。建议通过比较不同场合桥面粘结层的抗剪强度测试值和理论计算值,判定粘结层的粘结效果,用于指导防水粘结层的选择。The mechanical properties of several types of binding layers on concrete bridge pavements were analyzed by using finite element method,and the sensitivities between their shear strengths and several pavement parameters including thickness,modulus,lateral load and tire pressure were studied.The range of shear angle was obtained and a simplified calculation equation for the shear strength of bonding layer between pavement and concrete bridge was put forward.By varying shear angle from 25° to 65° during inner-door skew shearing experiment,the varying rules of shear strength of bonding layer with temperature were analyzed.Research result indicates that the thickness and lateral load are main influence factors for shear strength and shear angle,the shear property of bonding layer decreases rapidly with the increase of test temperature and shear angle,and the use of low modulus waterproofing roll with a certain thickness is disadvantageous to shear property.The sticking effect of bonding layer can be judged by the comparison of testing values and calculating values of shear strengths at different paving sites,which can be used to supervise the selection of water proofing binding layer.9 tabs,7 figs,11 refs.

关 键 词：桥面粘结层 抗剪强度 有限元方法 剪切角 斜剪试验 

分 类 号：U414.2[交通运输工程—道路与铁道工程]