详情

Impact Test of GFRP Reinforced Concrete Bridge Barriers

项目名称：	Impact Test of GFRP Reinforced Concrete Bridge Barriers
摘要：	The aim of this proposal is to provide test and evaluation of glass fiber reinforced polymer (GFRP) bars for concrete bridge barriers. The “steel-free” concrete bridge structure concepts have gained wider acceptance in current practice due to reduced material cost and validated field performance from the past research. However, on-site bending is still not possible for GFRP bars, which causes increase in the number of GFRP bars used in construction. Alternatively, headed end GFRP bars may address this problem. Existing research has conducted that both experimental and numerical modeling investigations to achieve an optimum design for GFRP reinforcement in concrete structures, especially railings. It was suggested that the headed-end GFRP bars can provide sufficient resistance, however, with an added cost. Therefore, anchorage GFRP bars with modified bending radius has also been suggested to achieve same resistance with lower cost. Considering the on-going effort in seeking the optimized GFRP configurations for concrete bridge railings, the preliminary design and validation is critical in finding the best design prior to the field implementation of GFRP bars for concrete bridge railings in the state of Missouri. The research team from Missouri S&T along with industrial partners and Missouri Department of Transportation (MoDOT) engineers has an on-going research project on the preliminary design and numerical evaluation of the GFRP reinforced concrete barriers. From the preliminary findings, the two-piece GFRP designs were selected and moved into numerical investigation stage. The preliminary numerical results indicate the existing design can withstand the Manual for Assessing Safety Hardware (MASH) specifications. However, the dynamic impact test is needed for validation. Considering the high cost in full-scale vehicle impact test, the team is considering alternative testing method which has significantly higher cost-effectiveness. The pendulum impact test is proposed for this MATC proposal.
状态：	Active
资金：	135780
资助组织：	Office of the Assistant Secretary for Research and Technology
管理组织：	Mid-America Transportation Center
项目负责人：	Stearns, Amy
执行机构：	Missouri University of Science & Technology, Rolla
主要研究人员：	Wu, Chenglin
开始时间：	20220201
预计完成日期：	20230630
主题领域：	Bridges and other structures；Design；Highways；Materials