A survey of steel moment-resisting frame buildings affected by the 1994 Northridge Earthquake

Abstract

Merrill and Wiss Janney Elstner. The hard work and dedication of those who completed the survey forms under considerable time pressure are appreciated. The technical review and assistance in preparing the report by Ann Bieniawski and careful review by Diana Todd are gratefully acknowledged.

Optimum drilled flange moment resisting connections for seismic regions

“…As it was expected, for the same storey drift angel, WUF connections exhibited significantly EPEQ and RI compared to similar RBS and DH1 connections. This behaviour can explain the poor seismic performance of WUF connections in previous earthquakes [1][2][3].…”

“…Extensive failure in welded unreinforced flange (WUF) connections in steel moment resisting frames (MRFs) during the 1994 Northridge Earthquake highlighted the poor seismic performance of these connections [1]. Several studies on the failures observed in the preNorthridge connections concluded that high three-axial stresses at the complete joint penetration welds at beam flanges resulted in a flange break off close to the weld lines before any significant yielding and plastic deformation could develop [2,3].…”

Nelinearna seizmička analiza čeličnog okvira s djelomično krutim priključcima

“…Mnoga istraživanja proizašla su upravo nakon potresa Northridge, 1994. [22][23][24][25] u kojima je uglavnom analizirano ponašanje zavarenih priključaka.…”

Finite Element Analyses on Free From Damage Seismic Resisting Beam-to-Column Joints

“…Although effective and economically advantageous at the construction stage, the capacity design philosophy applied to traditional structural systems requires structural damages after seismic events, thus leading to significant economic losses [9][10][11][12][13].…”