Experimental and analytical study of galloping forces on support structures

dc.contributor.advisor Terry J. Wipf
dc.contributor.advisor Mardith A. Baenziger
dc.contributor.author Wu, Mingche
dc.contributor.department Civil, Construction, and Environmental Engineering
dc.date 2018-08-23T03:23:40.000
dc.date.accessioned 2020-06-30T07:12:10Z
dc.date.available 2020-06-30T07:12:10Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 1996
dc.date.issued 1996
dc.description.abstract <p>Until recently, the design of the transmission lines and the structures supporting the lines have been primarily based on static loads with a conservative safety factor. The project seeks to improve the design by determining realistic forces for dynamic forces due to galloping. Therefore, a base-excitation test was performed experimentally to simulate galloping and then to measure the dynamic forces on support structures directly. The single-span wire, symmetrical with respect to midspan, was subjected to support motion at both ends by hydraulic actuators to excite galloping motion. Two hundred and twenty-one tests have been performed on a variety of wire lengths, areas, unit weights, modulus of elasticity, and span length. Results of the experimental study include the description of the test model's vibrating behavior, time of occurrence of galloping, and the relationships between support force and unit weight/area/length of the wire;The project also seeks to develop the equations of galloping motion for linear and nonlinear cases. An algorithm based on the physical interpretation of the equations was developed to obtain the solution numerically. Results of analytical study confirm the experimental observation of the wire's galloping characteristic. It also provides the support force in correspondence with a given amplitude.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/11347/
dc.identifier.articleid 12346
dc.identifier.contextkey 6453659
dc.identifier.doi https://doi.org/10.31274/rtd-180813-10393
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/11347
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/64594
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/11347/r_9626076.pdf|||Fri Jan 14 18:48:07 UTC 2022
dc.subject.disciplines Civil Engineering
dc.subject.keywords Civil and construction engineering
dc.subject.keywords Civil engineering (Structural engineering)
dc.subject.keywords Structural engineering
dc.title Experimental and analytical study of galloping forces on support structures
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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