Abdelkarim Omar I, ElGawady Mohamed A
Civil Engineering Department, University of Sherbrooke, Sherbrooke, QC J1K 2R1, Canada.
Department of Civil, Architectural, and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA.
Polymers (Basel). 2016 Dec 13;8(12):432. doi: 10.3390/polym8120432.
This paper presents the difference in behavior between hollow-core fiber reinforced polymer-concrete-steel (HC-FCS) columns and conventional reinforced concrete (RC) columns under vehicle collision in terms of dynamic and static forces. The HC-FCS column consisted of an outer FRP tube, an inner steel tube, and a concrete shell sandwiched between the two tubes. The steel tube was hollow inside and embedded into the concrete footing with a length of 1.5 times the tube diameter while the FRP tube stopped at the top of footing. The RC column had a solid cross-section. The study was conducted through extensive finite element impact analyses using LS-DYNA software. Nine parameters were studied including the concrete material model, unconfined concrete compressive strength, material strain rate, column height-to-diameter ratio, column diameter, column top boundary condition, axial load level, vehicle velocity, and vehicle mass. Generally, the HC-FCS columns had lower dynamic forces and higher static forces than the RC columns when changing the values of the different parameters. During vehicle collision with either the RC or the HC-FCS columns, the imposed dynamic forces and their equivalent static forces were affected mainly by the vehicle velocity and vehicle mass.
本文从动态和静态力的角度，介绍了空心纤维增强聚合物 - 混凝土 - 钢（HC - FCS）柱与传统钢筋混凝土（RC）柱在车辆碰撞下的行为差异。HC - FCS柱由外部纤维增强聚合物（FRP）管、内部钢管和夹在两根管之间的混凝土壳组成。钢管内部为空心，嵌入混凝土基础，长度为管径的1.5倍，而FRP管止于基础顶部。RC柱具有实心横截面。该研究通过使用LS - DYNA软件进行广泛的有限元冲击分析来进行。研究了九个参数，包括混凝土材料模型、无约束混凝土抗压强度、材料应变率、柱高径比、柱直径、柱顶边界条件、轴向荷载水平、车辆速度和车辆质量。一般来说，当改变不同参数的值时，HC - FCS柱比RC柱具有更低的动态力和更高的静态力。在车辆与RC柱或HC - FCS柱碰撞期间，施加的动态力及其等效静态力主要受车辆速度和车辆质量的影响。
