Damage Assessment Of High-rise Composite Structure

Nowadays seismic design are developing and absorbing new methods. Undoubtly,performance-based design method becomes the trend of future design method of structures,which makes the objective of seismic design diveses from single to optional. Such idea ofseismic design is advanced. And the keypoint of performance-based design is to choosereasonable performance parameters and required performance objectives.In displace-based assessment two sets of index are required, including an integral set anda partial set. Integal index use drift for assessment, while partial index use demand ratio, theratio between demand and capacity of elements, which is a reflection of element damage.Applying both integral and partial index, a comprehensive demage analysis can be done. Andthen we can choose a performance objective to reinforce the original structure.Then we build up a practical structure of high-rise composite frame-tude building, dotime-history nonlinear analysis, and have a damage assessment applying both integral andpartial index. The seismic wave we input include waves of7degree and8degree intensity. Soas to get better informed of the seismic performance of the structure under seismic impact ofdesigned and even higher intensity. Based on the results, we determine the performanceobjective and try some schemes for reinforcement.To choose the best scheme, firstly we need to pick up those schems satisfying requiredperformance demand. Secondly, consider about costing and employing demands, etc. Wechoose schemes by the seimic performance of each models and other economic index, andfinally give suggestion of optimal schemes.