C-130 testings on low-rising buildings

Show simple item record

dc.contributor.committeeChair Smith , Douglas A . en_US
dc.contributor.committeeMember Letchford , Chris W . en_US
dc.contributor.committeeMember Gilliam , Kathleen en_US
dc.contributor.committeeMember Mehta , Kishor C . en_US
dc.degree.department Civil Engineering en_US
dc.degree.discipline Civil Engineering en_US
dc.degree.grantor Texas Tech University en_US
dc.degree.level Doctoral en_US
dc.degree.name Ph .D . en_US
dc.rights.availability unrestricted en_US
dc.creator Zhu , Hongchao en_US
dc.date.accessioned 2014 -06 -06T20 :38 :24Z
dc.date.available 2011 -02 -18T20 :14 :50Z en_US
dc.date.available 2014 -06 -06T20 :38 :24Z
dc.date.issued 2006 -05 en_US
dc.identifier.uri http : / /hdl .handle .net /2346 /13315 en_US
dc.description.abstract Investigations of wind -induced building damage have shown that roof and roofing systems are the most vulnerable parts of the whole building envelope to fail . Damages to the roof typically initiate around the roof corners and edges where extremely high suctions occur due to the flow separation . In an effort to improve the structural performance of buildings in strong wind events we studied building behavior at near ultimate wind loads . This work focuses on controlled full -scale experiments using the propellers of a C -130 aircraft to generate the flows . Testing was carried out on two low -rise residential constructions , in particular , a manufactured home and a modular home . In this test , a Hercules C -130 aircraft was used to generate simulated wind events . The flow characteristics , induced external and internal pressures , and selected structural responses were measured during each event . In order to obtain the influence of building on the reference pressure , barometric and wind speed measurements , two wind tunnel tests were performed in Texas Tech Wind Tunnel . The experiments confirmed some differences in turbulence intensities , roughness length , integral scales and spectra of flows existed between C -130 generated flows and atmospheric boundary layer (ABL ) flow in open terrain . In general , the C -130 flow was less turbulent than the ABL flow . As to the pressure distribution over the manufactured home and modular home , some scatter of the data is evident for runs conducted at lower flow speeds , but data from runs at higher flow speeds show little scatter . Compared to ASCE 7 -02 , it was found that ASCE7 -02 (MWFRS ) provided an upper limit to current results . However , a few exceptions occurred on the roof leading edge . The results of full scale C -130 tests were consistent with that of wind tunnel tests , full scale natural wind tests and other similar research . The existence of the test specimens had a significant influence on the wind speed measurement especially when the wind speed anemometers were close to the buildings . When wind speed anemometers were behind the building , the measured wind speed decreased almost 50 % . When wind speed anemometers were in the front of windward walls , the recorded wind speed was about 10 -15 % less than non -influenced wind speeds . While , with wind speed anemometers located on the side of building models , the influenced of the buildings can be ignored . In the full scale tests , the influence of the buildings on reference pressure measurements needs to be considered and the correction of its influence is necessary . When the reference pressure pit was located directly in front of windward wall , the reference pressure pit experienced pressures higher than that in the free stream flow field . Whereas if the reference pressure pit was located beside the sidewall , the reference pressure pit experienced lower pressures . As to the influence of buildings on barometric pressure measurements , it only influences the calculation of air density less than 1 % , so it is reasonable to ignore it . This work was performed under the Department of Commerce NIST /TTU Cooperative Agreement Award 70NANB3H5003 . en_US
dc.language.iso en _US en_US
dc.publisher Texas Tech University en_US
dc.subject full scale testings en_US
dc.subject Low -rising buildings en_US
dc.title C -130 testings on low -rising buildings en_US
dc.type Electronic Dissertation en_US


C-130 testings on low-rising buildings. Doctoral dissertation, Texas Tech University. Available electronically from http : / /hdl .handle .net /2346 /13315 .

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search DSpace

Advanced Search