000018852 001__ 18852
000018852 005__ 20170118182244.0
000018852 04107 $$aeng
000018852 046__ $$k2017-01-09
000018852 100__ $$aAdam, Christoph
000018852 24500 $$aA Spectral Acceleration Based Intensity Measure for Seismic Assessment of P-Delta Vulnerable Frame Structures in the Collapse Limit State

000018852 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018852 260__ $$b
000018852 506__ $$arestricted
000018852 520__ $$2eng$$aThe efficiency of a recently introduced spectral based intensity measure (IM) is assessed, used for the assessment of the seismic collapse capacity of highly inelastic frame structures with deteriorating backbone curve vulnerable to the degrading effect of gravity loads (P-delta effect). This IM is derived from the geometric mean of the spectral pseudo-acceleration over a certain period interval considering period elongation due to inelastic deformations and gravity loads, as well as higher mode effects. The IM optimization is achieved by using the mode in which 95% of the effective modal mass is exceeded as a lower bound period of the averaging interval. The IM upper bound period is 1.6 times the fundamental period. The 5%damped spectral pseudo-acceleration at the system’s fundamental period is the benchmark IM. In a parametric study on generic frames, characteristic structural parameters are varied to quantify their impact on the performance of the IMs. The proposed IM minimizes collapse capacity due dispersion due to record-to-record variability for one-story and multi-story structures. Compared to the benchmark IM, the “optimal” IM increases the efficiency in average by about 20% for material non-deteriorating structures, and by 30% for medium material deteriorating systems.

000018852 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018852 653__ $$acollapse capacity; efficiency; geometric mean of spectral acceleration; intensity measure; P-delta effect

000018852 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018852 720__ $$aAdam, Christoph$$iKampenhuber, David$$iIbarra, Luis F.
000018852 8560_ $$ffischerc@itam.cas.cz
000018852 8564_ $$s3986882$$uhttps://invenio.itam.cas.cz/record/18852/files/235.pdf$$yOriginal version of the author's contribution as presented on USB, paper 235.
000018852 962__ $$r16048
000018852 980__ $$aPAPER