基于装配式桥梁界面黏结层的力学性能分析  

Analysis of Mechanical Properties of Interface Bonding Layer Based on Assembled Bridges

作　　者：乔建刚 胡恩乾 陶瑞 杨海洋 QIAO Jian-gang;HU En-qian;TAO Rui;YANG Hai-yang(School of Civil Engineering and Transprotation,Hebei University of Technoloy,Tianjin 300401,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401

出　　处：《科学技术与工程》2025年第10期4326-4333,共8页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(52278342)。

摘　　要：装配式桥梁具有施工简便、环境污染小特点,越来越受到交通建设的重视,为了保证装配式桥梁结构连接的安全性和可靠性,以桥梁工程、结构力学为基础,对不同种类的界面剂进行强度试验设计,分析不同水泥标号、水灰比、灰砂比的力学性能,得到不同种类的界面剂与不同龄期下抗折强度变化规律,明确了水泥砂浆前期强度较后期增长更快;得到不同种类的界面剂与不同龄期下抗压强度变化规律,构建了水泥砂浆不同龄期与强度的关系预估模型,从折压比角度提出SS-Ⅲ的力学性能最优;通过开发黏结劈裂抗拉强度试验装置,试验并分析不同界面剂与黏结劈裂抗拉强度的关系,得到相同水泥标号条件下,水泥砂浆的黏结性能要优于水泥净浆,不同水泥标号条件下,高标号水泥黏结性能更优,确定了SS-Ⅲ为装配式桥梁界面黏结剂其黏结性能最优,最后从黏结层的折压比、黏结性两个维度提出了SS-Ⅲ即P.O52.5水泥、水灰比为0.4、灰砂比为2.4的水泥砂浆作为装配式桥梁界面剂较为合理,为装配式桥梁界面连接的安全性和可靠性分析提供了一种新的研究思路。In order to ensure the safety and reliability of the structural connection of assembled bridges,the strength test design of different types of interface agents was carried out based on bridge engineering and structural mechanics,and the mechanical properties of different cement grades,water-cement ratio and ash-sand ratio were analyzed.The change law of the strength of cement mortar in the early stage is faster than that in the later stage.The change law of the compressive strength of different types of interface agents with different ages was obtained,the prediction model of the relationship between different ages and strength of cement mortar was constructed,and the optimal mechanical properties of SS-III were proposed from the perspective of the bending-compression ratio.The relationship between different interface agents and the tensile strength of adhesion splitting was tested and analyzed by developing the test device of adhesion splitting tensile strength.The bonding performance of SS-III was determined to be the best interface bonding agent for assembled bridges from the perspective of the bending ratio and bonding properties.cement mortar as the interface agent for assembled bridges is more reasonable,which provides a new research idea for the safety and reliability analysis of the interface connection of assembled bridges.

关 键 词：装配式桥梁 界面剂 力学性能 折压比 黏结性能 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]