摘要
在我国东北、内蒙古、西藏和青海等严寒地区,发展轨道交通事业,必然遇到纤维混凝土在寒冷地区地铁车站结构中的应用问题。为此,采用数值计算分析方法,建立了纤维混凝土数值计算本构模型,实现纤维混凝土力学性能的数值计算模拟,开展了纤维混凝土在地铁车站结构中的应用性分析,主要研究结论如下:(1)聚丙烯纤维的抗压性强于聚乙烯醇纤维,玄武岩纤维的抗冻性最差;随着纤维含量的增加,抗压强度逐渐降低;(2)纤维材料可以提高混凝土的力学性能,增强寒冷地区地下工程结构的稳定性。
In severe cold regions such as Northeast China,Inner Mongolia,Tibet,and Qinghai,the development of rail transit will inevitably encounter the application of fiber concrete in the structure of subway stations in cold regions.To this end,numerical calculation and analysis methods were used to establish a numerical constitutive model for fiber concrete,and achieve numerical simulation of the mechanical properties of fiber concrete.The application analysis of fiber concrete in subway station structures was carried out.The main research conclusions are as follows:(1)Polypropylene fiber has stronger compressive strength than polyvinyl alcohol fiber,while basalt fiber has the worst frost resistance;As the fiber content increases,the compressive strength gradually decreases.(2)Fiber materials can improve the mechanical properties of concrete and enhance the stability of underground engineering structures in cold regions.
作者
刘洋
刘建美
刘大鹏
韩宇聪
LIU Yang;LIU Jian-mei;LIU Da-peng;HAN Yu-cong(Shandong Seventh Geological and Mineral Exploration Institute,Linyi 276002,China;School of Civil Engineering,Shandong University,Ji’nan 250061,China)
出处
《工程建设与设计》
2024年第11期60-63,共4页
Construction & Design for Engineering
关键词
地铁车站
纤维混凝土
数值计算
寒冷地区
subway station
fiber concrete
numerical calculation
cold regions
