000011950 001__ 11950
000011950 005__ 20141205160004.0
000011950 04107 $$aeng
000011950 046__ $$k2008-10-12
000011950 100__ $$aTurer, Ahmet
000011950 24500 $$aStrengthening of Masonry with Concrete Slab Using Spring Box and Heat Stretched Post-Tensioning Bars

000011950 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011950 260__ $$b
000011950 506__ $$arestricted
000011950 520__ $$2eng$$aNon-engineered masonry houses constitute a major portion of the building stock in developing countries. Although masonry houses have major walls resisting lateral earthquake forces, the unreinforced nature and commonly weak inter-bonding and material properties of these walls make them vulnerable to earthquakes. A simple yet effective and economical strengthening technique was investigated for the seismic strengthening of masonry houses which have reinforced concrete decks. Placement of vertical post-tensioning bars between the floor and ceiling provided increase in strength multiple times the original capacity and improved behavior of masonry walls. A special spring box system was developed to maintain the major portion of the post-tensioning force in vertical tendons although almost all of the post-tensioning force is lost with the conventional systems as the walls pass their cracking capacity and move into nonlinear range. A heat stretching technique was developed to further reduce the application cost by eliminating complicated hydraulic based stretching tools or intermediate systems such as turnbuckle or bolted connections. A number of loading tests were conducted on ½ scale 6m long laboratory specimens to obtain level of improvement by comparing measured results. The findings indicate that rebar based post-tensioning is a very cost-efficient, effective, and simple way for strengthening against earthquakes for non-engineered masonry houses that have concrete slab or upper wall (spandrel) beams.

000011950 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011950 653__ $$aMasonry, post-tension, non-engineered, brick, rebar

000011950 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011950 720__ $$aTurer, Ahmet$$iErdogdu, Murat
000011950 8560_ $$ffischerc@itam.cas.cz
000011950 8564_ $$s462542$$uhttps://invenio.itam.cas.cz/record/11950/files/S18-007.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S18-007.
000011950 962__ $$r9324
000011950 980__ $$aPAPER