Experimental and numerical investigations were conducted on impact performance and deflection of precast, portable concrete construction barrier, referred to as a portable concrete barrier (PCB), with a free-standing and a box-beam stiffened configuration. A 61-m long PCB system, consisting of ten 6.1-m long PCBs, was initially evaluated with two full-scale crash tests in a free-standing configuration and a box-beam stiffened configuration according to safety performance guidelines in Manual for Assessing Safety Hardware (MASH) 2016 for Test Level 3 (TL-3). Finite element models were developed using LS-DYNA and validated with these crash tests to ensure their feasibility to estimate barrier deflections and evaluate safety performance. The validated numerical models were used to conduct numerical simulations and investigate effects of concrete constitutive models and barrier length on the performance of PCB system with a box–beam stiffened configuration. Numerical results provided information on the selection and use of concrete constitutive models for evaluation of reinforced concrete barrier impact performance. Furthermore, the reduced-length analysis demonstrated that a reduction in the total system length resulted in decreased dynamic barrier deflection during impact events, as the ends of each system were pinned. This reduced-length analysis provided useful guideline on PCB system design and application for traffic control plan.

对预制的便携式混凝土建筑屏障（称为便携式混凝土屏障（PCB））的冲击性能和挠度进行了实验和数值研究，该屏障具有独立式和箱形梁加劲结构。首先根据“评估安全手册”中的安全性能指南，对一个由十个6.1m长的PCB组成的61米长的PCB系统进行了两次独立式和箱形梁加硬配置的全面碰撞测试，以进行评估。硬件（MASH）2016年测试级别3（TL-3）。使用LS-DYNA开发了有限元模型，并通过这些碰撞测试进行了验证，以确保其估计障碍物挠度和评估安全性能的可行性。经过验证的数值模型用于进行数值模拟，并研究混凝土本构模型和阻隔长度对具有箱形梁刚性配置的PCB系统性能的影响。数值结果提供了有关选择和使用本构模型评估钢筋混凝土屏障冲击性能的信息。此外，减小长度的分析表明，减小总系统长度会导致在撞击事件期间减小动态屏障变形，因为每个系统的末端都固定了。