Seismic Safety Analysis and Reinforcement Measures Research of Open Floodgate Chamber Structure
Taking an open flood control gate located in the Ⅷ degree area of the basic seismic intensity as an example and based on ADINA finite element analysis software,the seismic capacity of the gate chamber structure was analyzed by the time history analysis method.Aiming at the aseismic defects of the upper hoist room structure of the gate chamber,different aseismic reinforcement schemes were formulated.Through the comparison and analysis of the aseismic capacity of different reinforcement schemes,the better reinforcement scheme was select-ed.On the basis of the better scheme,the internal influence law of the section size on the reinforcement effect of the gate chamber structure was explored.The results show that there is a large tensile stress area at the bent angle of the hoist room bent column of the flood gate cham-ber structure under the earthquake action,and the maximum tensile stress value exceeds the bearing capacity of the structure,which does not meet the seismic safety requirements.The addition of connecting beams between each bent column can reduce the dynamic response of the hoist room structure,however,it should not be added at the top in the design process to avoid whiplash effect in the hoist room structure.The section size of the connecting beam has a significant influence on the seismic capacity of the bent column structure of the hoist room.In the actual project,the ideal seismic reinforcement effect can be achieved by controlling the section size.
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