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Seismic responses of deck‐type arch bridges
Author(s) -
Dusseau Ralph A.,
Wen Robert K.
Publication year - 1989
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290180509
Subject(s) - arch , structural engineering , deck , finite element method , arch bridge , ground motion , span (engineering) , engineering , acceleration , motion (physics) , geology , stress (linguistics) , geotechnical engineering , physics , linguistics , philosophy , classical mechanics
The dynamic responses of three deck‐type arch bridges, with main spans of 59,213 and 518m, are presented. The ratios of natural period to arch span were found to be quite close for all three bridges. Artificial ground motions were applied separately in three directions to finite‐element models of each bridge. Three acceleration levels were considered—0.09 g , 0.22 g and 0.50 g —corresponding to the AASHTO Seismic Risk Zones I, II and III, respectively. Responses to uniform lateral motion were generally the largest, while the responses to vertical motion were generally lower than those due to lateral or longitudinal motion. In all cases considered, none of the total stresses in the main members exceeded the yield stress. Connection and secondary member responses were also calculated and are presented. In addition, the effects of unequal motions at the supports were sampled by various deterministic inputs. While the effects of such motions in the vertical and lateral directions were less than the responses to uniform motion, the effects of unequal longitudinal motions at the supports were substantial.