000019820 001__ 19820
000019820 005__ 20170118182338.0
000019820 04107 $$aeng
000019820 046__ $$k2017-01-09
000019820 100__ $$aMoustafa, Mohamed
000019820 24500 $$aSeismic Performance of Braced Steel Frames Under Long Duration Ground Motions

000019820 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019820 260__ $$b
000019820 506__ $$arestricted
000019820 520__ $$2eng$$aOver the past decade, several long duration subduction earthquakes took place in different locations in Chile and Japan. These events highlighted the importance of comprehensive investigation of the effect of the ground motion duration on structural performance. This paper presents a preliminary computational modeling developed in the OpenSees framework to assess the seismic performance of concentrically braced frames (CBF) under long duration earthquakes. The objective of the study is to explore the effect of low-cycle fatigue on structural members and the accumulated damage as related to the ground motion duration. Nonlinear time history analysis was conducted using subduction and crustal ground motion records. A calibrated model was used to compare between the behavior of a single-story X-braced CBF and a typical six-story frame under both types of ground motions. It was found that the effect of duration on the nonlinear seismic response is particularly significant in terms of the strain accumulated in the braces causing induced low-cycle fatigue fracture. Therefore, particular attention should be given to the effect of earthquake duration when designing CBF buildings located in the proximity of subduction zones and do not rely only on response spectral values in predicting the structural response.

000019820 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019820 653__ $$aLow-cycle fatigue; Braced frames; Long duration ground motions.

000019820 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019820 720__ $$aMoustafa, Mohamed$$iHammad, Ali
000019820 8560_ $$ffischerc@itam.cas.cz
000019820 8564_ $$s769944$$uhttps://invenio.itam.cas.cz/record/19820/files/4480.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4480.
000019820 962__ $$r16048
000019820 980__ $$aPAPER