TY - JOUR
T1 - Wind analysis of pipeline suspension bridges
AU - Dusseau, Ralph Alan
N1 - Funding Information:
Research began at Wayne State University in 1985 on a project entitled "Dynamic Analysis of Pipeline Suspension Bridges." This ongoing research, which has been funded by grants from American Natural Resources (ANR), is now in its fourth year. The work began with a study of two ANR pipeline bridges located in southern Louisiana near the Gulf of Mexico: the Patterson Loop Aerial Crossing (PLAC) and the Avalon Extension Aerial Crossing (AEAC). Previously reported findings of this research (Dusseau & Haddad, 1987) indicated that vortex shedding was the cause of vertical wind oscillations of the PLAC which occurred in steady winds of 5-to 8-mph (8.0-to 12.g-kph) shortly after its completion in 1975. These oscillations were in the form of a three-node or three-segment motion which resembles 1½ sine waves. The subsequent installation of diagonal cable stays has substantially increased structure damping thus preventing further wind oscillations. These results agree in large measure with the findings pertaining to similar wind oscillations and diagonal cable retrofitting of the Coosa River Bridge in Clayton, Alabama (Steinman, 1952).
PY - 1990
Y1 - 1990
N2 - Two pipeline suspension bridges, with main spans of 850 feet (259.1 meters) and 1008 feet (307.2 meters), were investigated for wind load responses. Previously published findings indicated that vortex shedding was the cause of vertical wind oscillations of the former span which occurred shortly after its completion. These wind oscillations are now prevented by diagonal cable stays that have substantially increased structure damping. For the latter span, which has no diagonal cable stays, the relatively rigid profile of the suspended pipe is the likely reason why vertical wind oscillations of this span have not occurred. The responses of new suspended pipe profiles, which further increase pipe rigidity and hence decrease the risk of vertical wind oscillations of pipeline suspension bridges, are reported here. Additional investigations of the two original spans and new studies of two other pipeline suspension bridges are currently being conducted.
AB - Two pipeline suspension bridges, with main spans of 850 feet (259.1 meters) and 1008 feet (307.2 meters), were investigated for wind load responses. Previously published findings indicated that vortex shedding was the cause of vertical wind oscillations of the former span which occurred shortly after its completion. These wind oscillations are now prevented by diagonal cable stays that have substantially increased structure damping. For the latter span, which has no diagonal cable stays, the relatively rigid profile of the suspended pipe is the likely reason why vertical wind oscillations of this span have not occurred. The responses of new suspended pipe profiles, which further increase pipe rigidity and hence decrease the risk of vertical wind oscillations of pipeline suspension bridges, are reported here. Additional investigations of the two original spans and new studies of two other pipeline suspension bridges are currently being conducted.
UR - http://www.scopus.com/inward/record.url?scp=0025625701&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025625701&partnerID=8YFLogxK
U2 - 10.1016/0167-6105(90)90089-U
DO - 10.1016/0167-6105(90)90089-U
M3 - Article
AN - SCOPUS:0025625701
VL - 36
SP - 927
EP - 936
JO - Journal of Wind Engineering and Industrial Aerodynamics
JF - Journal of Wind Engineering and Industrial Aerodynamics
SN - 0167-6105
IS - PART 2
ER -