000011487 001__ 11487
000011487 005__ 20141205155915.0
000011487 04107 $$aeng
000011487 046__ $$k2008-10-12
000011487 100__ $$aRyu, Naosuke
000011487 24500 $$aUse of Graded Composite Strands in PCAPC Structures for Better Seismic Performance

000011487 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011487 260__ $$b
000011487 506__ $$arestricted
000011487 520__ $$2eng$$aWhen major earthquakes hit urban areas in the world in 1990’s and 2000’s, many damaged reinforced concrete buildings did not function continuously during a long term repair period. Base isolation is one of the solutions to reduce the seismic damage and prevent the out-of-service state, but it needs high initial and maintenance costs and cannot be applied to every building. This study aims to propose an economical structural system with precast prestressed concrete (PCaPC) structures. PCaPC structures need no or little repair after earthquakes due to their self-centering characteristics. However, they also show excessive lateral deformations under earthquakes because of their low stiffness and small energy dissipation capability. The authors proposed to use graded composite strands (GCS-U) which has both characteristics as a tendon and an energy dissipating element. A GCS-U consists of seven high yield strength wires surrounded by twelve low yield strength wires. In an experimental phase, cyclic loading test on three PCaPC portal frames with different types of tendons (GCS-U, ordinary strands with or without bond) were conducted. The specimen using GCS-U showed larger amount of energy dissipation as the specimen using unbonded strands. All specimens showed and almost no damage until 2% story drift. In an analytical phase, envelope curves of experimental lateral load-drift relations were simulated accurately with a frame analysis model. It is confirmed that PCaPC structures with GCS-U have high possibility to provide economical damage-free buildings.

000011487 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011487 653__ $$aPrecast prestressed concrete structures, Graded composite strand, Residual deformation, Energy dissipation, Flag shape hysteresis loop

000011487 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011487 720__ $$aRyu, Naosuke$$iIchioka, Yukako$$iNishiyama, Minehiro$$iKono, Susumu$$iWatanabe, Fumio
000011487 8560_ $$ffischerc@itam.cas.cz
000011487 8564_ $$s1264323$$uhttps://invenio.itam.cas.cz/record/11487/files/12-03-0077.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 12-03-0077.
000011487 962__ $$r9324
000011487 980__ $$aPAPER