Seismic Evaluation of Incremental Seismic Retrofitting Techniques for Typical Peruvian Schools

Loa, Gustavo; Muñoz, Alejandro; Santa-Cruz, Sandra

doi:10.1061/9780784480410.009

Cited by 3 publications

(9 citation statements)

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“…At least one school was inaugurated every day in that period, allowing the Peruvian capital to lower its infrastructure deficit, with positive effects in terms of school attendance for children [37]. However, most of these schools, which are still currently operational, show critical deficiencies in their structure, far from meeting the standards of current Peruvian anti-seismic regulations [38]. More specifically, these buildings suffer from short-column shear failure, a structural failure that consists of slender columns partially restrained by infill walls [39].…”

Section: Description Of the Case Studymentioning

confidence: 99%

“…Recent efforts by the Peruvian government, however, are trying to reduce the vulnerability of these infrastructures by drawing up an ambitious plan to retrofit these schools to withstand big earthquakes [42]. For this, three different low-cost incremental seismic rehabilitation (ISR) techniques (i.e., steel, concrete and masonry) were developed, all of which were validated in previous studies in terms of seismic resistance and economic values [38,43]. The retrofitting techniques applied aim at avoiding the fragile failure mechanism of short column, while increasing stiffness, strength, and ductility of the structure in the longitudinal direction in the event of an earthquake.…”

Section: Description Of the Case Studymentioning

confidence: 99%

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A Method to Include Life Cycle Assessment Results in Choosing by Advantage (CBA) Multicriteria Decision Analysis. A Case Study for Seismic Retrofit in Peruvian Primary Schools

et al. 2021

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Building information modeling (BIM) is an emerging technology that improves visualization, understanding, and transparency in construction projects. Its use in Latin America and the Caribbean (LA&C), while still scarce, is developing in combination with multi-criteria decision-making (MCDM) methods, such as the choosing by advantages (CBA) method. Despite the holistic nature of MCDM methods, the inclusion of life cycle environmental metrics is lagging in construction projects in LA&C. However, recent studies point toward the need to optimize the synergies between BIM and life cycle assessment (LCA), in which a method like CBA could allow improving the quality of the decisions. Therefore, the main objective of this study is to integrate LCA and CBA methods to identify the effect that the inclusion of environmental impacts can have on decision-making in public procurement, as well as comparing how this final decision differs from an exclusively LCA-oriented interpretation of the results. Once the LCA was performed, a set of additional criteria for the CBA method were fixed, including transparency, technical, and social indicators. Thereafter, a stakeholder participative workshop was held in order to gather experts to elucidate on the final decision. The methodology was applied to a relevant construction sector problem modelled with BIM in the city of Lima (Peru), which consisted of three different construction techniques needed to retrofit educational institutions. Results from the LCA-oriented assessment, which was supported by Monte Carlo simulation, revealed a situation in which the masonry-based technique showed significantly lower environmental impacts than the remaining two options. However, when a wider range of technical, social, and transparency criteria are added to the environmental indicators, this low-carbon technique only prevailed in those workshop tables in which environmental experts were present and under specific computational assumptions, whereas teams with a higher proportion of government members were inclined to foster alternatives that imply less bureaucratic barriers. Finally, the results constitute an important milestone when it comes to including environmental factors in public procurement in LA&C.

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Section: Description Of the Case Studymentioning

confidence: 99%

Section: Description Of the Case Studymentioning

confidence: 99%

A Method to Include Life Cycle Assessment Results in Choosing by Advantage (CBA) Multicriteria Decision Analysis. A Case Study for Seismic Retrofit in Peruvian Primary Schools

et al. 2021

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“…Loa et al (2017) estimated E [ Loss|IM ] for SB rehabilitation, which is very useful to define imperative mitigation programs, but they do not give us enough information about a life-cycle costs.…”

Section: Study Casementioning

confidence: 99%

Life-cycle cost analysis for an incremental seismic rehabilitation project

2021

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Incremental seismic rehabilitation (ISR) consists of a set of discrete rehabilitation actions in order to decrease initial costs and to avoid long-lasting disruptions. Nevertheless, there are few cases of incrementally retrofitted buildings and few studies about its economic feasibility. The objective of this work is to evaluate the differences between incremental and single-stage rehabilitation in terms of economic losses during the building’s life span. For this purpose, this work analyzes three rehabilitation proposals to improve seismic performance of typical school buildings. Based on P58 FEMA (Federal Emergency Management Agency) methodology, expected repair costs and benefits were calculated for each rehabilitation intervention. Results confirm the potential of ISR for improving essential buildings.

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“…In designing the reinforced concrete jacketing, the compressive strength of the concrete and the yield strength of reinforcing bars were assumed equal to 21 MPa and 420 MPa, respectively. This technique requires the reinforcement of the footings for the new walls due to the increase in axial forces during seismic actions [21]. Its main advantage is the great increase in the performance of the structure in terms of stiffness, resistance, and ductility.…”

Section: Intervention a 3 -Rc Wallsmentioning

confidence: 99%

“…Fragility curves of the investigated buildings in current state and with the four considered retrofitting techniques are defined using Peak Ground Acceleration (PGA) as the ground motion intensity measure (IM). Although other IMs have shown to produce more meaningful results (e.g.,Housner Intensity, Arias Intensity, Acceleration Spectrum Intensity, and Average spectral acceleration), PGA has been considered to comply with existing hazard data and vulnerability models developed over the years by different research groups for Lima Metropolitan area (e.g., [1][2][3]5,21]). Fragility curves of the investigated buildings in current state and with the four considered retrofitting techniques are generatedfollowing the procedure proposed by several authors [29].…”

Section: Structural Performance Evaluation Fragility and Vulnerabilimentioning

confidence: 99%

Comparison of Different Intervention Options for Massive Seismic Upgrading of Essential Facilities

2020

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The seismic retrofitting of essential facilities is a typical problem of public administrations. Due to the large amount of existing and/or historic buildings with a high seismic vulnerability and the limited economic resources, it is necessary to provide efficient solutions for the structural reinforcement of these structures on a national, regional, and urban level. This paper proposes an innovative and multidisciplinary framework to choose massive interventions on a large territorial scale according to the potential benefits of the intervention in terms of reduction in expected economic losses associated with retrofitting intervention and other important aspects usually neglected in intervention strategies. The proposed framework is based on Multi-Criteria Decision-Making (MCDM) analysis. It is applied to a very complex urban area: the case study is the school buildings stock (4458 buildings) in the Lima Metropolitan area, Peru. The goal of the study is arisk analysis aimed at selecting the optimal retrofitting strategy in a huge urban area. The results of this work can be considered the base for decision-makers. They could use them as a decision support tool in the seismic risk mitigation on a large territorial scale.

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Seismic Evaluation of Incremental Seismic Retrofitting Techniques for Typical Peruvian Schools

Cited by 3 publications

References 4 publications

A Method to Include Life Cycle Assessment Results in Choosing by Advantage (CBA) Multicriteria Decision Analysis. A Case Study for Seismic Retrofit in Peruvian Primary Schools

A Method to Include Life Cycle Assessment Results in Choosing by Advantage (CBA) Multicriteria Decision Analysis. A Case Study for Seismic Retrofit in Peruvian Primary Schools

Life-cycle cost analysis for an incremental seismic rehabilitation project

Comparison of Different Intervention Options for Massive Seismic Upgrading of Essential Facilities

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