Response of multiply supported secondary systems to earthquakes in frequency domain

Dey, Aparna; Gupta, Vinay K.

doi:10.1002/(sici)1096-9845(199802)27:2<187::aid-eqe725>3.0.co;2-g

Cited by 17 publications

(5 citation statements)

References 19 publications

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“…In terms of influence factors considered, the studies by Dey and Gupta [50,51] made a significant leap to introduce soil-structure interaction (SSI) effect in the analysis of multiplyattached secondary structures. In their studies, both fixed and flexible-base primary structures were assumed to behave linearly.…”

Section: mentioning

confidence: 99%

Review of Approaches for Analysing Secondary Structures in Earthquakes and Evaluation of Floor Response Spectrum Approach

Lim

Chouw

2015

International Journal of Protective Structures

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Secondary structures are the members that are not part of the primary load-bearing components in a structural system. Although not intended to bear loads, secondary structures could be subjected to earthquake loading that may lead to failures. Damage to secondary structures could pose significant threats to life safety, prevent buildings from functioning and result in major economic loss. During past decades, a considerable amount of research efforts has been dedicated to develop rational approaches for seismic analysis of secondary structures. This paper aimed to assess these developments to today's knowledge as a reference for more accurate design. The review began with a brief description of the response characteristics of secondary structure under seismic loading, especially focusing on the factors that influence the responses. An appraisal of current numerical and experimental analysis methods of secondary structure is presented. Results from experimental work are used to validate the reliability of floor response spectrum and current design provision. Finally, an outlook of future possible research direction for more realistic design of secondary structures is given.

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Section: mentioning

confidence: 99%

Review of Approaches for Analysing Secondary Structures in Earthquakes and Evaluation of Floor Response Spectrum Approach

Lim

Chouw

2015

International Journal of Protective Structures

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“…The correlation between the dynamic characteristics of the supporting structure and those of the secondary system in the amplification of the latter's dynamic response was also verified through the recorded response of actual buildings subjected to earthquake excitations by Fathali and Lizundia, 40 by Anajafi and Medina, 48 and by Kazantzi et al 49 In the case of multiply-supported secondary systems (see Figure 1B), most of the reported research on the influence of the vibrating supporting structure is investigated by decoupling the equations of motion of the supporting structure from those of the secondary systems. [50][51][52][53]…”

Section: Evolution In Seismic Design Practice For Secondary Systemsmentioning

confidence: 99%

An engineering approach for evaluating the dynamic response of acceleration‐sensitive secondary systems in flexible structures

Pardalopoulos

Manolis

2021

Earthq Engng Struct Dyn

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Secondary systems are nonstructural components that serve important functions within a structure, but are not considered as an integral part of the main structural system. There are many categories of secondary systems addressing architectural aspects, mechanical, electrical, communication, water supply and plumbing functions, as well as being part of the structure's content. The main issue regarding the installation of secondary systems in structures placed in seismically prone regions is preservation of their integrity and functionality during earthquake motions, since failure can have dramatic consequences in terms of property losses and safety concerns. This study introduces a new methodology for approximating the seismic response of acceleration-sensitive secondary systems with a mass lower than 1% of the total mass of the primary structure, and whose seismic excitation derives exclusively from the motion of that structure, that is, interaction phenomena are ignored. The methodology applies to secondary systems installed on regular and flexible primary structures exhibiting floor diaphragm action and quantifies the seismic demand from information based solely on the deflected shape of the structure at the instant it reaches peak seismic response. The methodology can be applied in alternative ways, depending on the required accuracy of the results and on acceptable computational cost, yielding good quality results when compared to those derived from detailed time-history analyses. Thus, the present methodology signifies a departure from the current state-of-design of acceleration-sensitive secondary building components, which does not fully account for the vibrations of the primary structure. Finally, the accuracy of the methodology is gauged through a number of application examples involving different combinations of primary-secondary systems.

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“…In the case of multiply supported (generalized) secondary systems (GSS), the reported research is significantly less extensive , the emphasis being on decoupling the equations of motion of the supporting structure from those of the secondary system.…”

Section: Seismic Demands For Design Of Nonstructural Componentsmentioning

confidence: 99%

Seismic response of nonstructural components attached on multistorey buildings

Pardalopoulos

Pantazopoulou

2014

Earthq Engng Struct Dyn

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SUMMARYThe maintenance of integrity and functionality of nonstructural components during earthquake excitations is of paramount importance since mechanical failure of those systems can have dramatic consequences in terms of property damage and life safety of the buildings' occupants. This paper explores the dynamic response of nonstructural elements attached on multistory buildings with well-established floor diaphragm action. Depending on the type of support conditions, seismic response of nonstructural components may be controlled either by acceleration or displacement: Nonstructural components that are subjected to uniform support excitation are controlled primarily by the absolute spectral acceleration developing at their point of attachment on the supporting building. On the contrary, seismic response of multiply supported nonstructural components depends primarily on the relative displacements between successive support points that are imposed by the supporting building during lateral sway. These findings are illustrated from the analytical formulation and its solution through time history analysis of the governing dynamic equation of motion of the primary and secondary components of a system modeled using finite elements. The model encompasses the assembly of a multistory building along with a multiply supported gas pipeline network. It is shown that the dependence of the seismic response of nonstructural components may be linked to the deformed shape of the supporting building at the state of its maximum lateral roof displacement, thereby enabling the definition of design procedures for these systems.

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Response of multiply supported secondary systems to earthquakes in frequency domain

Cited by 17 publications

References 19 publications

Review of Approaches for Analysing Secondary Structures in Earthquakes and Evaluation of Floor Response Spectrum Approach

Review of Approaches for Analysing Secondary Structures in Earthquakes and Evaluation of Floor Response Spectrum Approach

An engineering approach for evaluating the dynamic response of acceleration‐sensitive secondary systems in flexible structures

Seismic response of nonstructural components attached on multistorey buildings

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