| dc.contributor.advisor |
Engelhardt , Michael D . |
|
| dc.contributor.advisor |
Civil , Architectural , and Environmental Engineering |
|
| dc.contributor.committeeMember |
Helwig , Todd |
|
| dc.creator |
Dara , Sepehr |
|
| dc.date.accessioned |
2010 -11 -09T16 :26 :21Z |
|
| dc.date.accessioned |
2010 -11 -09T16 :26 :27Z |
|
| dc.date.accessioned |
2011 -08 -16T15 :49 :12Z |
|
| dc.date.available |
2010 -11 -09T16 :26 :21Z |
|
| dc.date.available |
2010 -11 -09T16 :26 :27Z |
|
| dc.date.available |
2011 -08 -16T15 :49 :12Z |
|
| dc.date.created |
2010 -05 |
|
| dc.date.issued |
2010 -11 -09 |
|
| dc.date.submitted |
May 2010 |
|
| dc.identifier.uri |
http : / /hdl .handle .net /2152 /ETD -UT -2010 -05 -1495 |
|
| dc.description.abstract |
Seismic -resistant steel eccentrically braced frames (EBFs ) are designed so that that yielding during earthquake loading is restricted primarily to the ductile links . To achieve this behavior , all members other than the link are designed to be stronger than the link , i .e . to develop the capacity of the link . However , satisfying these capacity design requirements for the beam segment outside of the link can be difficult in the overall design process of an EBF . In some cases , it may be necessary to make significant changes to the configuration of the EBF in order to satisfy beam design requirements . If this discovery is made late in the design process , such changes can be costly .
The overall goal of this research was to develop guidelines for preliminary design of EBFs that will result in configurations where the beam is likely to satisfy capacity design requirements . Simplified approximate equations were developed to predict the axial force and moment in the beam segment outside of the link when link ultimate strength is developed . These equations , although approximate , provided significant insight into variables that affect capacity design of the beam . These equations were then used to conduct an extensive series of parametric studies on a wide variety of EBF configurations . The results of these studies show that the most important variables affecting beam design are 1 ) the nondimensional link length , 2 ) the ratio of web area to total area for the wide flange section used for the beam and link , 3 ) the angle between the brace and the beam , and 4 ) the flexural stiffness of the brace relative to the beam . Recommendations are provided for selection of values for these variables in preliminary design . |
|
| dc.format.mimetype |
application /pdf |
|
| dc.language.iso |
eng |
|
| dc.subject |
Eccentrically braced frames |
|
| dc.subject |
EBF |
|
| dc.subject |
Shear link |
|
| dc.subject |
Moment link |
|
| dc.subject |
Beam segment outside the link |
|
| dc.subject |
Axial compressive strength |
|
| dc.subject |
Flexural strength |
|
| dc.title |
Guidelines for preliminary design of beams in eccentrically braced frames |
|
| dc.type.genre |
thesis |
* |
| dc.type.material |
text |
* |
| thesis.degree.name |
Master of Science in Engineering |
|
| thesis.degree.level |
Masters |
|
| thesis.degree.discipline |
Civil Engineering |
|
| thesis.degree.grantor |
University of Texas at Austin |
|
| thesis.degree.department |
Civil , Architectural , and Environmental Engineering |
|
| dc.date.updated |
2010 -11 -09T16 :26 :27Z |
|