摘要
针对车辆减速在生态高延性水泥基复合材料桥面无缝连接板内引起的剪应力问题,设计了冻融-碳化交替作用下生态高延性水泥基复合材料的剪切性能试验.首先研究生态高延性水泥基复合材料试块的碳化前沿,然后研究试块的剪切性能.结果表明:随着交替次数的增加,试块的碳化前沿逐渐增加;随着交替次数的增加,试块应力-应变上升段曲线逐渐平缓,弹性模量损伤因子逐渐增加,而剪切应变能损伤因子在交替次数1～3次后增加,在5～15次后降低.因此,在桥面连接板设计中可采用经历15次交替作用后试块的剪切应力-应变曲线.
Aimed at shear problem caused by vehicles deceleration in bridge jointless link slab produced by ecological high ductility cementitious composites (Eco-HDCC), the shear property of Eco-HDCC under cyclic effects on the freeze-thaw and carbonation was studied. The carbonation front of Eco-HDCC was determined. Then, the shear performance of Eco-HDCC was investigated. The results show that with the increase of the cycle, the carbonation front of Eco-HDCC increases with a slow speed. In addition, with the increase of the cycle, the ascending shape of the shear stress-strain curve for Eco-HDCC is gentler and the shear elastic modulus damage factor shows an increased trend. The shear strain energy damage factor increases after 1 to 3 cycles, and decreases after 5 to 15 cycles. Therefore, the shear stress-strain curve of Eco-HDCC after 15 cycle is adopted in bridge link slab design.
作者
柴丽娟
郭丽萍
陈波
罗德谟
黄国钢
邓忠华
Chai Lijuan;Guo Liping;Chen Bo;Luo Demo;Huang Guogang;Deng Zhonghua(School of Materials Science and Engineering, Southeast University, Nanjing 211189, China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China;Yongan Transportation Bureau, Yongan 366000, China;Baohualin Industrial Development Co., Ltd., Yongan 366000, China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第1期76-81,共6页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(51438003
51739008
51778133)
国家重点研发计划资助项目(2016YFC0401610)
国家重点基础研究发展计划(973计划)资助项目(2015CB655102)
福建省交通运输科技资助项目(2017Y057)
江苏省"六大"人才高峰计划资助项目(JZ-004)
江苏省第五期333高层次人才工程资助项目
关键词
交替作用
碳化前沿
剪切应力-应变
应变能
弹性模量
cyclic effect
carbonation front
shear stress-strain
strain energy
elastic modulus
