Low-Damage Rocking Precast Concrete Cladding Panels: Design Approach and Experimental Validation

Bhatta, Jitendra; Dhakal, Rajesh; Sullivan, Timothy J.; Lanyon, Mark

doi:10.1080/13632469.2020.1830201

Cited by 13 publications

(3 citation statements)

References 14 publications

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“…For example, fully floating ceilings with shock absorbers along the perimeter was found to resist much larger floor accelerations without any damage in comparison to traditional perimeter fixed grid ceilings [8]. Similarly, novel designs to accommodate higher drift demands (in excess of what structures are designed for) by rocking have been developed and validated for internal partitions and external claddings [9][10][11]. Note that the enhancement in drift/acceleration capacity of NSEs in these innovative solutions have been achieved by reconfiguring the connections without the use of significant additional/costly materials.…”

Section: Improving Seismic Performance Of Nsesmentioning

confidence: 99%

“…Hence, seismic performance of non-structural elements (SPONSE) needs to improve in order to minimize financial loss in future earthquakes. Unsurprisingly, awareness of the importance of SPONSE research has significantly increased in NZ in the recent years [1][2][3], and researchers are striving to identify and amend the inherent weaknesses in the current design and installation practices [4][5][6][7] and to develop low-damage solutions for key NSEs [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Seismic design of buildings: Where to next?

Dhakal

2024

BNZSEE

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This paper critically reviews the current building seismic design approach based on the observed performance of modern building stock in recent earthquakes, highlights the inability of the current design approach in controlling seismic damage and losses, and proposes a conceptual framework for next generation seismic design codes that is likely to meet public expectations. In addition to ensuring life-safety in rare earthquakes, the proposed loss-optimization seismic design approach also aims to ensure quick functional recovery and minimum loss (i.e. repair, downtime, and injury/fatality) in moderate-strong earthquakes by limiting damage to building’s structural and non-structural components. Based on comparison of performances of building stock in some recent major earthquakes in different countries, the paper presents some simple strategies to render buildings more resilient and suffer significantly less seismic damage (and consequentially incur less loss). Finally, the paper scrutinizes the efficacy of some commonly used low-damage technologies in minimizing building seismic losses.

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Section: Improving Seismic Performance Of Nsesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic design of buildings: Where to next?

Dhakal

2024

BNZSEE

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“…In New Zealand, there has been greater awareness of the importance of seismic design of NSEs in buildings as a result of the experience of 2010-2011 Canterbury earthquakes, the 2013 Seddon earthquake and the 2016 Kaikoura earthquake. These experiences provided the impetus to improve the seismic performance of non-structural elements (SPONSE), which in turn, has led to a significant amount of research on performance characterization of traditionally designed and installed NSEs, and laid the foundation for the development of low-damage designs for different NSEs [6][7][8][9][10][11][12][13][14][15][16][17][18]. Despite these efforts, the NZ construction industry still faces significant issues related to seismic design and installation of NSEs [19,20].…”

Section: Introductionmentioning

confidence: 99%

Seismic design of acceleration-sensitive non-structural elements in New Zealand: State-of-practice and recommended changes

Rashid

Dhakal²,

Sullivan³

2021

BNZSEE

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Acceleration-sensitive non-structural elements not only constitute a significant portion of a building’s component inventory, but also comprise components and systems that are indispensable to the operational continuity of essential facilities. In New Zealand, Section 08 of the seismic loadings standard, NZS 1170.5: Earthquake Actions, and a dedicated standard, NZS 4219: Seismic Performance of Engineering Systems in Buildings, address the seismic design of non-structural elements. This paper scrutinizes the design provisions for acceleration-sensitive non-structural elements in NZS 1170.5 and NZS 4219, and provides an international perspective by comparing with the design provisions for non-structural elements specified in ASCE 7-16, the latest ATC approach and Eurocode 8. This is followed by a detailed discussion on the improvements required for component demand estimation, the need for design criteria that are consistent with performance objectives, definition of realistic ductility factors, and recommendations for the future way forward in the form of an improved design procedure and its application through a new seismic rating framework.

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