Journal of Civil Engineering Researchers
Volume:3 Issue: 4, Autumn 2021

During the Northridge and Kobe earthquakes, many steel bending frames were damaged in beam-to-column joints. Excessive deformation due tostructural stiffness and rigidity limits the use of this system. Ductility of joints causes more energy to be lost before joints fail. As a solution, slit steel dampers were used in the joints to prevent brittle damage to the joints and damage to the mainmembers of the structure. In the present study, a yielding slit damper has been validated in the laboratory using data from a valid article; it is done through ABAQUS finite element software. The evaluation and comparison of nonlinear and numerical analysis of yield slit dampers will be presented hereafter. The first part of this assessment is about the vertical load of the beam connected to the steel column, which will be followed by the evaluation of the research variables, i.e., the different modes of change in thickness, state and reinforcement of the slit damper, in the connection of the beam to the steel column. The results show that increasing the damper thickness increases its strength, hardness and absorbed energy but decreases its ductility. The same results also indicate that internal strengthening of a yielding slit damper in beam-to-column connections increases strength, stiffness and laterally absorbed energy but decreases the ductility. Meanwhile, the proposed specimen and idea of a yieldingslit damper in the connection of the beam to the steel column, has proved that the reinforced specimen of the proposed specimen has the best performance among the specimens and transfers the plastic area into the damper range in the connection of the beamto the steel column.

Estimating the amount of alongshore sediment transport (LSTR) is an extremelyimportant task for coastal engineers and coastal project managers to determine the probability of erosion and sedimentation in shores and ports.There are two popular empirical formulas, CERC and Kamphuis, that can be used to calculate the potential of the LSTR rate of the coast. In this study, sediment transport rate was calculated throughexperimental formulas and effective simulation in the Pozm Harbor is located in Oman Sea in the coordination of 25 ° 21 ° N and 60 ° 17 ° E.Using wave data and Specification of sediment. Also, the numerical simulation of this rate is calculated using numerical modeling. The numerical simulation results behind the groin have been compared with the new hydrography of data was collected in 2017. Furthermore,numerical modelhasbeen evaluatedand general morphology has been identified. Based on sediment transport volumes calculated at Pozm harbor, a suitable sediment transport rate can be achieved using this numerical model and the Kamphuis formula.