Use of Load Dependent Ritz Vectors in Modal Pushover Analysis

Abstract eng:
A T: The performa T ance of a str ructural system can be est timated using a non-linea static analy which ha found g ar ysis as widespread use in perfor w u rmance based seismic des d sign due to i simplicity in estimatin inelastic s its y ng structural response. Mo r odal Pushover Analysis (M r MPA) has bee suggested to increase th accuracy o Pushover analysis; en he of but it fails in some cases o the irregula structural systems (i.e. stiffer lower stories). The o b of ar s objective of th paper his is to present t use of Lo Dependen Ritz vector (LDR) whi takes into account the spatial distrib i the oad nt rs ich bution of dynamic forc instead of commonly u d ce; f used eigen-m mode shape in the MPA in order to imp n prove the acc curacy of calculated res c sponse of irre egular system when limit number of modes is to be considere especially for stiff ms ted f o ed, y systems wher higher mo effects ca re ode annot be igno ored. The num merical resul have indic lts cated that usi LDR ing vectors, in case of stiffer lower stori v c ies, increase the accuracy of force re y esponse sign nificantly (bec cause of inclusion of higher mode effects without really c i e computing th hem). There are also som suggestion about me ns choosing adequate number of required Ritz vectors f vertically regular or irr c r for regular structu considere ures ed.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket