Influence of lag time for slave control locomotive on longitudinal coupler forces of 30000t train

Article HistoryThe behavior of concrete members reinforced with fiber reinforced polymer (FRP) bars has been the focus of many studies in recent years due to their excellent corrosion resistance, high tensile strength, and good non-magnetization properties. However, the low modulus of elasticity of the FRP materials and their non-yielding characteristics results in large deflection and wide cracks in FRP reinforced concrete members. This review was focusing in different behavior of FRP bars in reinforced concrete (RC) structures. Data and information collected in this review were gathered from the experimental, numerical and analytical studies from previous researches.Contribution/ Originality: This study contributes in the existing literature by investigate the behavior of FRP bars in reinforced concrete (RC) structures. Due to the increased use of FRP bars in concrete structures, the performance of FRP bars has been an important research topic in recent years.

Article HistoryReinforced concrete (RC) is the most widely used construction system in construction. The non-linear response of concrete when subjected to extreme dynamic loads such as blast is an important consideration for analysis and design of structures members. In this paper numerical modeling of RC column under blast load is presented using LS DYNA explicit dynamics software package. The accuracy of the model to simulate RC column responses to blast loads is verified by comparing the numerical simulation results with the test results available in the literature. A parametric study was chosen to investigate the effects of charge weight and stand-off distance on the dynamic behavior of RC column. The results of the numerical study show that the charge weight and standoff distance has a significant effect on the behavior of RC columns under explosion loading. Contribution/ Originality:The main contribution of this research is a better understanding of the dynamic response of RC columns under various blast magnitudes. Blast loading and its effects on a structure are influenced by a number of factors including charge weight, location of the blast, geometrical configuration and orientation of the structure.

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