000018811 001__ 18811
000018811 005__ 20170118182242.0
000018811 04107 $$aeng
000018811 046__ $$k2017-01-09
000018811 100__ $$aMeza-Fajardo, Kristel
000018811 24500 $$aWave Passage Effects on Torsional Response of Symmetric Buildings in the Near-Fault Region

000018811 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018811 260__ $$b
000018811 506__ $$arestricted
000018811 520__ $$2eng$$aThis article investigates the effects of wave passage on the torsional response of elastic buildings in the near-fault region. The model of the soil-foundation-structure system is a symmetric cylinder placed on a rigid circular foundation supported on an elastic halfspace. The idealized model is subjected to obliquely incident plane SH waves simulating the action of near-fault pulse-like motions. The response of the structure is assessed in terms of the relative twist between the top and the base of the superstructure. It is shown that the torsional response is most sensitive to a key parameter of the near-fault ground motion referred to as “pulse period”. Specifically, large rotations are observed when the pulse period is close to the torsional period of the structure. It is also demonstrated that the wave passage effects are controlled by the wave apparent velocity, rather than the local site conditions. Furthermore, broadband near-fault ground motions from three hypothetical earthquakes of different magnitude are generated, and the torsional responses due to the simplified pulse-like and broadband ground motions are compared against each other. The results show that the simplified pulse model that describes the coherent seismic radiation is able to represent the main features of the near-fault ground motions that cause large torsional response. The maximum relative twist at resonance is found to be ~10 rad, a value that is consistent with the upper bound of rotations in structures reported in the literature.

000018811 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018811 653__ $$awave passage effects; near-fault excitation; torsional response; wave apparent velocity; soil-structure interaction

000018811 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018811 720__ $$aMeza-Fajardo, Kristel$$iMavroeidis, George$$iPapageorgiou, Apostolos$$iCao, Yenan
000018811 8560_ $$ffischerc@itam.cas.cz
000018811 8564_ $$s603665$$uhttps://invenio.itam.cas.cz/record/18811/files/2283.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2283.
000018811 962__ $$r16048
000018811 980__ $$aPAPER