防灾减灾工程学报2018，Vol.38Issue(1)：72-80,9.DOI:10.13409/j.cnki.jdpme.2018.01.010
内置钢骨形式对混凝土桥墩撞击性能影响研究
Research on Influence of Embedded Steel Skeleton Form on Impact Performance of Concrete Piers
摘要
Abstract
In order to study the influence of embedded steel skeleton form on the impact performance of concrete bridge piers,three kinds of concrete bridge piers with different embedded steel skeleton forms,i.e.,angle steel,steel channel,and steel pipe,were tested under horizontal impact force.The time-history curves of impact force,displacement and strain of steel and concrete,were obtained.The mechanical properties of bridge piers with different embedded steel skeleton forms at different impact stages were compared and analyzed.The influence of steel skeleton forms on the impact performance of concrete piers was calculated by means of mechanical analysis method.The experimental results show that the steel skeleton form has a certain influence on the impact performance of piers.Under the same impact energy,the lateral deformation of concrete piers embedded with steel pipe is smaller than that embedded with steel channel or angle steel.The embedment of steel channel and steel pipe can greatly inhibit the development of compressive strain in concrete at pier bottom.The concrete pier embedded with steel pipe has more failure diagonal cracks,better ductility and higher anti-impact capacity.The principal compressive stress and strain of concrete of diagonal crack zone at pier bottom are calculated and analyzed.The calculation and analysis results show that different steel skeleton forms change the geometrical parameters of the pier section,hence affecting the principal compressive stress of the concrete pier.The principal compressive stress of the concrete pier embedded with steel pipe is reduced by 24.54％ compared to that embedded with angle steel under the same steel ratio.The strain amplification factor of concrete pier embedded with steel pipe is smaller than that embedded with angle steel.The experiments and calculation analyses prove that the concrete bridge pier embedded with steel pipe has better impact performance.关键词
钢骨混凝土桥墩/钢骨形式/撞击性能/试验与分析Key words
steel reinforced concrete pier/steel skeleton form/impact performance/test and analysis分类
交通工程引用本文复制引用
陈佳佳,张南,巫业双,沙笑笑..内置钢骨形式对混凝土桥墩撞击性能影响研究[J].防灾减灾工程学报,2018,38(1):72-80,9.基金项目
国家自然科学基金项目(51278243)资助 （51278243）
