Damage-based Research Of Masonry Structure Performance-based Seismic Design

Masonry structure puts up high stiffness, poor integrality and seismicperformance with the requirement of seismic theory updating． As theperformance-based design’s rapid development, it appears more important for studyon the performance-based seismic research of masonry structure．Based on thisbackground, the study concentrates on the damage constitutive model, whileproposing performance-level classification and performance-based seismic designmethod．The main research includes:1Based on a great deal of seismic hazard information, the article proposes theprimary seismic problems．Meanwhile, concept of performance-based seismicdesign is suggested to be brought into the analysis of masonry structure by thesummary of various kinds of seismic design method.2A damage constitutive model of masonry is created by meso-damage theoryand statistics method．After that, the article comes up with the concept of effectivedamage development stage and combines it with the damage model．Verification ofthe model has also been conducted.3The division of the displacement performance level has been done by FEanalysis, while the vibration property has also been learned.4Various masonry building models with different window openings andstructural measures have been created．With comparative study about pushoveranalysis and dynamic time-history analysis, model performance at different levelshave been learned in order to give the effect of holes and details and the model’svariation law.5A kind of damage index reflecting the stiffness degradation anddamage-based performance level classification is given by FEM analysis. Based onthe index, a kind of damage spectrum is proposed by the research of damage indexversus static nolinear index. With the theory of nolinear SDOF displacement effect,damage-based performance spectrums and the design process is also found, while proposing a design example.