Estimation of Rotational Ground Motion Effects on the Bell Tower of Parma Cathedral

Zembaty, Zbigniew; Rossi, Andrea; Spagnoli, Andrea

doi:10.1007/978-3-319-14246-3_4

Cited by 9 publications

(10 citation statements)

References 6 publications

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“…The seismic response databank of the 88 space irregular MRFs was created by approximately 30000 dynamic nonlinear time histories in the framework of incremental dynamic analysis (IDA). The response quantities of interest were: (1) the roof displacement at the onset of first plastic hinge, ur,y, (2) the peak roof displacement, ur,max,…”

Section: Frame Modeling and Ground Motions For Inelastic Analysismentioning

confidence: 99%

“…Irregular building structures may suffer significantly more damages compared to regular structures [1], indicating that their inelastic seismic response cannot be always estimated with safety by utilizing the methods of current seismic design codes [2]. Many researchers in the past have examined the seismic response of structures with irregularities [1,[3][4][5][6], mostly on two-dimensional (2-D) frames, highlight the importance of treating irregular structures as a special type of structures and the need of developing effective design procedures or upgrading existing ones to account for the new drift and ductility demands. The three-dimensional (3D) frame modelling appears to be a sufficient solution for the study of irregular building structures for which torsional motion may not be treated adequately by traditional, simplified plane models.…”

Section: Introductionmentioning

confidence: 99%

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A Damage‐Controlled Behavior Factor (EC8) for Seismic Design of Steel Irregular Space MRFs

Tzimas

Skalomenos²,

Beskos

2021

ce papers

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A main aspect to consider in seismic design of building structures according to EC8 is the selection of the behavior factor, q, which is directly related to the energy dissipation capacity of the structure. The prescribed values of q (1) are referred only to one limit state; (2) depend on the structural system and on the ductility class; (3) are constant; and (4) are not directly related to structural and non‐structural demands. Based on the literature, the inelastic seismic response of irregular building structures cannot be always estimated with safety by utilizing the methods of current seismic design codes. In this work, a preliminary performance‐based seismic design method which incorporates deformation‐controlled q factors, to better control the structural and non‐structural damage, is developed for space steel moment resisting frames irregular in plan view and in elevation within the framework of hybrid force/displacement (HFD) seismic design method. A large seismic response databank is generated on the basis of 88 space irregular MRFs, subjected to 42 pairs of ordinary ground motions, to develop the necessary empirical equations employed by the HFD. A realistic design example serves to demonstrate the advantages of the proposed method over the seismic design procedure of EC8.

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Section: Frame Modeling and Ground Motions For Inelastic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Damage‐Controlled Behavior Factor (EC8) for Seismic Design of Steel Irregular Space MRFs

Tzimas

Skalomenos²,

Beskos

2021

ce papers

View full text Add to dashboard Cite

show abstract

“…Frequency and amplitude of modulation have been determined taking into account the linearity of the interferometer response. The Sagnac phase shift can be determined using measurement of the first (A 1w ) and second (A 2w ) amplitude of the harmonic output signal [u(t)] by following the mathematical equation [13,27] …”

Section: The Fosrem Detection Electronic Unitmentioning

confidence: 99%

The laboratory investigation of the innovative sensor for torsional effects in engineering structures’ monitoring

Kurzych

Kowalski²,

Sakowicz

et al. 2016

Opto-Electronics Review

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“…The effect of rotational components is usually considered relatively small when compared with the translational components and is therefore neglected 1 in routine seismic design despite the recent surge in research on rotational seismology. In fact, rotational ground motion may contribute to the response of certain structures, and several studies were reported confirming the same including Newmark, 2 Hart et al, 3 Bycroft, 4 Wolf et al, 5 De‐La‐Llera and Chopra, 6 Zembaty and Boffi, 7 Ghayamghamian and Nouri, 8 Zembaty, 9,10 Ghayamghamian, et al, 11 Politopoulos, 12 Falamarz‐Sheikhabadi and Ghafory‐Ashtiany, 13,14 Basu et al, 15 Falamarz‐Sheikhabadi, 16 Basu and Giri, 17 Basu et al, 18 Falamarz‐Sheikhabadi et al, 19 Zembaty et al, 20 Meza Fajardo and Papageorgiou 21,22 and Bońkowski et al 23 . These components are not measured by the accelerographs deployed in the free field owing to the non‐availability of appropriate instruments until recently.…”

Section: Introductionmentioning

confidence: 99%

A computationally efficient framework for rotation dependent and rotation independent intensity measures

Vats

Basu

2020

Earthq Engng Struct Dyn

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Orientation of a structure in a site is generally known but not the direction of maximum shaking during a future seismic event. Two different types of intensity measures (IMs) are usually used to approximately account for this directionality effect, namely, the rotation dependent such as RotDxx and GMRotDxx and the rotation independent such as RotIxx and GMRotIxx. Rotation dependent IMs are presently constructed by performing time history analysis for all possible orientation (usually @ 1 degree) of the input ground motion set followed by picking the xx‐percentile spectral ordinate. In other words, the construction of RotDxx spectrum requires a set of 180 time history analysis of an oscillator per spectral ordinate. Similarly, the construction of GMRotDxx requires time history analysis of an oscillator against 90 pairs of orthogonal components per spectral ordinate. This paper presents a framework that enables the construction of rotation dependent IMs by performing time history analysis against a pair of as‐recorded components with some nominal supplemental processing. This reduces the computational cost more than 90% when compared with the state of the art. Rotation independent IMs are defined through finding out the rotation that minimizes the error (often termed as the penalty function) with respect to the target spectra of associated rotation dependent IM as the benchmark. Resulting rotation independent IMs show somewhat sensitivity on the maximum time period used in spectral representation. This paper presents an alternate definition (involving scaling and rotation) for rotation independent IMs that nearly eliminates such sensitivity.

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Estimation of Rotational Ground Motion Effects on the Bell Tower of Parma Cathedral

Cited by 9 publications

References 6 publications

A Damage‐Controlled Behavior Factor (EC8) for Seismic Design of Steel Irregular Space MRFs

A Damage‐Controlled Behavior Factor (EC8) for Seismic Design of Steel Irregular Space MRFs

The laboratory investigation of the innovative sensor for torsional effects in engineering structures’ monitoring

A computationally efficient framework for rotation dependent and rotation independent intensity measures

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