Demountable Precast Concrete Frame–Building System for Seismic Regions: Conceptual Development

Aninthaneni, P. K.; Dhakal, Rajesh

doi:10.1061/(asce)ae.1943-5568.0000275

Cited by 42 publications

(14 citation statements)

References 11 publications

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“…Although modular precast buildings with "dry" steel connections have been recently proposed [14][15][16] to facilitate rapid construction and deconstruction, as of now, HPR connections seem to be the preferred connection type for new precast concrete buildings (at least in New Zealand). The combination of a bilinear elastic response of the PT tendons, and a bilinear elasto-plastic behaviour of the energy dissipaters, results in a flag-shaped hysteretic behaviour of HPR connections, as schematically illustrated in Figure 1.…”

Section: Key Features Of Hpr Framesmentioning

confidence: 99%

Hybrid posttensioned rocking (HPR) frame buildings: Low-damage vs low-loss paradox

Dhakal

2021

BNZSEE

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The 2010-11 Canterbury Earthquake Sequence inflicted seismic losses worth more than $40B, which is about 25% of the GDP of New Zealand (as per 2011 data). More than 80% of these losses were insured, which comprised of more than $10B covered by the Earthquake Commission (a New Zealand crown entity providing insurance to residential property owners) and more than $22B (comprising of roughly equal split between domestic and commercial claims) by private insurers [1]. The scale of financial impact has been perceived to be disproportionately large given the building regulatory regime in New Zealand is relatively stringent and the earthquakes and aftershocks were of moderate magnitude. As it is well known that some of the major faults spread in the Wellington region and the subduction boundary passing through the centre of New Zealand can generate much bigger earthquakes (upwards of magnitude 8), people are left pondering whether New Zealand is able to cope with the financial impact of larger earthquakes. This fearful realisation gradually led to people being dissatisfied with merely life-safe buildings and demanding more resilient buildings that meet the objectives of performance based design; i.e. suffer less damage, incur less loss, and can remain functional after earthquakes. In light of the extensive building damage resulting in high financial loss in recent earthquakes, practicing engineers and researchers in New Zealand have been advocating for revising the current design approach to improve performance of new structures and infrastructure in future earthquakes [2-5]. As a result, large proportion of buildings constructed in the last decade (including those built to replace earthquake-damaged buildings) have shied away from the traditional damage-friendly ductile structural systems and instead adopted one of the new and emerging structural systems claimed to be “low-damage”. In many cases, the adopted structural systems are not covered by existing design standards and are approved as alternate solutions through expert peer review. The “low-damage” attribute of most structural systems has been validated by component (or sub-assembly) level experimental tests, but their interactions with other building components and implications of their use in buildings have not been rigorously scrutinised. Hence, the rushed adoption of some of these systems in buildings can surprise the engineering community in future earthquakes with mismatch between the expected and real performances of the buildings; akin to what New Zealand engineering fraternity is currently going through due to realisation of poor seismic performance of precast hollow-core flooring system that has been widely used in New Zealand buildings without rigorous scrutiny. One such “low-damage” structural system is precast post-tensioned rocking frames with supplemental energy dissipaters. This paper summarises the development of this structural system, critically reviews the literature reporting the seismic performance of this system, and qualitatively evaluates system-level implications of its use in buildings. This paper is intended to better inform engineers of the likely seismic performance of buildings with this structural system so that they can optimise its benefits by giving due consideration to its effect on other building components.

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Section: Key Features Of Hpr Framesmentioning

confidence: 99%

Hybrid posttensioned rocking (HPR) frame buildings: Low-damage vs low-loss paradox

Dhakal

2021

BNZSEE

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“…Experimental studies on demountable shear connectors [39,40] have been carried out. Aninthaneni and Dhakal [41,42] proposed a demountable concrete building system that is suitable for seismic regions.…”

Section: Literature Reviewmentioning

confidence: 99%

Analysis of Guidelines and Identification of Characteristics Influencing the Deconstruction Potential of Buildings

2018

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Growing concerns regarding environmental preservation and the fact that the construction industry is one of the sectors with the highest rates of resource consumption and waste generation, have encouraged the adoption of deconstruction as an alternative to the demolition of buildings at the end of their lifecycle. However, the choice of strategies to enable deconstruction requires an in-depth knowledge of how the building’s characteristics, combined with the procedures adopted in the deconstruction process, will affect the reutilization of materials and components. In this paper, characteristics relating to design for deconstruction (DfD) are identified and the influence of each characteristic on the viability of a deconstruction is analysed. A literature review is conducted to assess the guideline of DfD and to identify relevant characteristics. These characteristics are then divided into the following categories: direct influence enabling deconstruction; influence on the ease of the process; and, influence on prolonging a building’s lifecycle. A number of questions are suggested for analysing each characteristic, and these can be employed in the development of a methodology for evaluating a building’s deconstruction potential. The identification of characteristics involved in the deconstruction guidelines may assist in the optimization of projects and the planning of deconstruction processes.

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“…It was demonstrated that by increasing the reinforcement ratio, the energy dissipation capacity of the connections increases, while the ductility is not considerably affected. Aninthaneni and Dhakal [25] presented a new concept for demountable precast connections that could be reused after the effective life of the building, leading to considerable savings in the material waste and energy associated with the demolition of the structure. A column-to-column connection system was also proposed by Nzabonimpa and Hong [26], in which metal filler plates were used to create a rigid joint.…”

Section: Introductionmentioning

confidence: 99%

Development of a monolithic-like precast beam-column moment connection: Experimental and analytical investigation

Senturk

Pul

İlki

et al. 2020

Engineering Structures

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This study aims to develop a novel monolithic-like precast beam-column connection for reinforced concrete (RC) structures. The proposed connection system has several advantages such as rapid assembly and disassembly, reusability, and being replaceable if damaged during an earthquake event. An experimental investigation was first carried out to determine the seismic performance of the proposed connections. In total, six full-scale precast and monolithic T-shape beam-column connection specimens with different reinforcement ratios, specimen dimensions and detailing were tested under displacement controlled cyclic loading, while the axial load on the column was kept constant. The cyclic behaviour, curvature distribution, failure mode, energy dissipation capacity and ductility of the specimens were obtained using the experimental outputs.Detailed non-linear finite element (FE) models were then developed using ABAQUS. It is shown that the FE models can accurately predict the overall performance of the precast connections in terms of initial stiffness, lateral load-bearing capacity and post peak behaviour. The results indicate that, in general, the precast connections exhibited considerably higher (up to 34%) ductility and ultimate drift ratio (deformability) compared to similar monolithic connections. For the same drift ratio, monolithic connections exhibited slightly higher (on average 10%) energy dissipation capacity, while the precast connections generally dissipated higher energy at their ultimate point (post-peak lateral drift corresponding to 15% loss in lateral strength). It is demonstrated that the monolithic-like precast connections can satisfy the ACI 318-14 acceptance criteria, while they also sustain the ASCE 41-17 Collapse Prevention (CP) limits. Therefore, the proposed connection system is considered to be suitable for RC structures in seismic regions.

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Demountable Precast Concrete Frame–Building System for Seismic Regions: Conceptual Development

Cited by 42 publications

References 11 publications

Hybrid posttensioned rocking (HPR) frame buildings: Low-damage vs low-loss paradox

Hybrid posttensioned rocking (HPR) frame buildings: Low-damage vs low-loss paradox

Analysis of Guidelines and Identification of Characteristics Influencing the Deconstruction Potential of Buildings

Development of a monolithic-like precast beam-column moment connection: Experimental and analytical investigation

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