Study On Dynamic Characteristics And Engineering Applications For Frame Suspended Structure

As a creative structural system,suspended structure is famous for its spectacular model,ingenious force system and excellent energy consumption mechanism.It has been widely used in some engineering projects,which has got remarkable achievement.Combined with a CFRP cable suspended structure,this paper is going to analyze and evaluate this structural system by means of experiments,theoretical analysis and numerical simulation,and some engineering applications will be discussed as well.Based on the above purposes,the main works of the paper are as follows:First of all,the development,classification and advantages/disadvantages of suspended structural system are introduced,and the design ideas are explained in order to show its possible contributions and usages for AEC(Architecture,Engineering and Construction)industry.Several amazing suspended structures around the world,as well as their design method are introduced.Besides,according to the theoretical analysis and experimental research,works and conclusions of scholars for suspended structure are introduced.Secondly,the background information for the CFRP cable suspended structure are introduced.According to the characteristics of the structure,a dynamic test was designed to identify and extract the model information of the structure by sensors and test equipment under the environmental excitation.The finite element model is set up by CAE(computer aided engineering)software,and the model shall be modified according to the data acquired from tests.Three factors are selected to construct objective function.Based on frequency and mode of vibration,the structural model can be updated and used in further studies.Then,damage identification theory of suspended structure system stage is discussed.The main research method for this study is linear analytical method based on the eigenvalue and eigenvector.Besides,the self-iterative technique is used to revise the identified precision.Taking the suspended structure as an example,finite element program ABAQUS is combined with mathematical software MATLAB to identify damage region and related level by means of data analysis.Furthermore,ways to improve the identified accuracy are discussed as well.Finally,performances of the suspended structure system under seismic loads are studied.The structural response,including displacement response and acceleration response under earthquake is studied and the main energy consumption modes for the suspended structure are discussed.Furthermore,the collapse of structure under extreme earthquakes is studied by means of numerical simulation so as to determine the weak region/story for the suspended structure.