High-level Structure Line Elastic And Elastic-plastic Earthquake Response Analysis

With the development of national economy, more and more superhigh buildings are built. Because of their high cost and complex structure, much stress is laid on their seismic design and analysis. China is an earthquake active country, so the deep study of earthquake resistant behavior of tall-buildings is of great significance. Incorporating with the model dynamic experiment and Finite-Element seismic analysis of a shear-wall superhigh building, paper gives the earthquake resistant behavior of such structures.From the model experiment and FEM analysis result, paper draws the dynamic conclusion of shear-wall structure. The barrel shape structure work like an overhanging beam and when subjected to earthquake load, its dynamic stress of outer frame is greater than that of inner tube. The analysis result indicates that the middle f100r of structure is the weak part of distortion and stress. In the dynamic experiment, the structure is destroyed at the about location, so the dynamic response of superhigh structure is more controlled by the higher mode shape.Paper study the demolish process of high buildings with the nonlinear dynamic program of three-dimension. With the increase of earthquake motion, the f100r that takes the greatest distortion is changed. Paper also study the non-linear character of structure with Push-over analysis, from the result, paper learn that the Push-over method can reflect the elastoplastic trait of structure very well, but contrasted with the dynamic response analysis, the former method underestimate the earthquake resistant capability of structure.Through the mechanics analysis, paper also put up a more reasonable design project, and the nonlinear dynamic program of three-dimension also proves the superiority of the project...