Experimental Study On Seismic Performance Of High-rise Solar Suction Towers

As the country vigorously develops new energy sources,tower solar power stations have been widely promoted and extensively researched at home and abroad due to their advantages such as low heat storage costs and excellent power quality.Solar thermal towers are one of the most important buildings in tower solar power plants.The mass of the heat-absorbing tower is not uniform along the height direction,and the upper part has a large concentration mass.Due to the different vertical material selection,the rigidity of the junction between the steel structure and the concrete changes greatly,and therefore the structure of the heat-absorbing tower is similar to that of an ordinary reinforced concrete chimney structure.There are big differences,and there is no completely suitable norm at home and abroad for endothermic tower structures.Therefore,a vibrating table test was designed and manufactured for a solar heat-absorbing tower model structure with a scale ratio of 1:18.The ABAQUS finite element software was used to perform a dynamic time-history analysis of the model structure,and the heat absorption tower was studied under different intensity earthquakes.The seismic performance,grasp the weak parts,and put forward some reference suggestions for the design of the actual structure.A endothermic tower model structure with a scale ratio of 1:18 was designed and manufactured.Shaking table tests were performed to observe the development and damage of the model structure under different strength earthquakes.The dynamic characteristics of the model structure,the acceleration amplification factor,and displacement reaction were analyzed.The ABAQUS finite element software was used to analyze the dynamical time history of the heat absorption tower model.The dynamic characteristics,displacement responseand acceleration response of the structure were calculated and compared with the results of the shaking table test.It was found that the finite element calculation results are in good agreement with the test results.The dynamic time history analysis method was used to analyze the stress distribution of the structure under different strength earthquakes,as well as the damage location,damage development and damage status of the structure.The finite element calculation results are in good agreement with the test results.According to the result of shaking table test,the seismic performance of the solar energy absorption tower structure was evaluated,and the target of the seismic performance of the solar energy absorption tower structure satisfying the type II field and 7 degree fortification was obtained.At the same time,the weak parts of the structure are pointed out,and the reference suggestions are proposed for the design of the structure.Through the interactive verification of the shaking table test and the finite element simulation,the comprehensive research shows that the solar heat-absorbing tower structure can meet the requirements of the anti-seismic performance fortification targets under different seismic levels.