000012273 001__ 12273
000012273 005__ 20141205160037.0
000012273 04107 $$aeng
000012273 046__ $$k2008-10-12
000012273 100__ $$aZemp, René
000012273 24500 $$aPendular Tuned Mass Dampers in Free-Plan Chilean Tall Buildings

000012273 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000012273 260__ $$b
000012273 506__ $$arestricted
000012273 520__ $$2eng$$aThe first low-cost tuned mass damper system in Chilean building construction was recently designed and included on a 21-story plus 6-basement building. The structure is an example of the so-called Chilean free-plan building concept, which is characterized by shear-wall elevator and staircase core plus a perimeter frame with shallow beams and post-tensioned reinforced-concrete slabs. This article focuses on the most relevant results of the design, construction, testing and implementation of a 150 kN magnetorheological (MR) damper developed to seismically control this structure equipped with 2 tuned masses (TMs) at the roof of 160 tons each. First, the governing non-linear equations of motion of the TM-MR damper assembly are presented. Building displacements and accelerations are computed and analyzed for a suite of subduction-type and near field ground motions. It is observed that the RMS response modification factors obtained for earthquake excitation are strongly dependent on the frequency content of the excitation and may range in the average from 9% to 37% relative to the bare structure. A complete testing program was performed on the constructed damper and a physical controller proposed for the MR damper. A pull-back test on one of the TMs in the building was carried out to validate this controller. Its performance is essentially equivalent to that of an LQR controller, but the information required to implement it is considerably less. The MR damper designed was capable of controlling the TM displacements very effectively.

000012273 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012273 653__ $$aTM-MR damper assembly, vibration control, free-plan building, tuned masses

000012273 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000012273 720__ $$aZemp, René$$iDe La Llera, Juan C.$$iBreschi, Leopoldo
000012273 8560_ $$ffischerc@itam.cas.cz
000012273 8564_ $$s605304$$uhttps://invenio.itam.cas.cz/record/12273/files/11-0124.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 11-0124.
000012273 962__ $$r9324
000012273 980__ $$aPAPER