Seismic Response of Green Roofs

Carmody, Mark; Jasarevic, Milan; Omenzetter, Piotr; Clifton, Charles; Fassman, Elizabeth A.

doi:10.13140/2.1.2525.8564

Cited by 3 publications

(5 citation statements)

References 4 publications

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“…Una investigación realizada en el año 2009 mencionó las primeras premisas del comportamiento de una estructura con una carga de techo verde sometida a fuerzas laterales, en donde se encontró que el incremento de la humedad en la capa del sustrato del techo verde generaba un amortiguamiento extra debido al agua filtrada libre y retenida en capas inferiores (Carmody et al, 2009), con lo que se sugiere el análisis de un techo verde como un amortiguador de líquido sintonizado. Ese mismo año se presenta a los techos verdes como un sistema amortiguador de masa sincronizada, dado que cumple con las características de ubicarse en el nivel más alto de la estructura y poseer una masa considerable.…”

Section: Introductionunclassified

Optimización de la rigidez equivalente en estructuras de uno y dos pisos sometidas a cargas de techos verdes

Bejarano

Hernández²,

Cepeda³

2023

RIC

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From a linear and static perspective, the increase in displacements of a structure due to the implementation of a green roof could be counteracted by increasing the stiffness of the structure. This article proposes the use of the differential evolution algorithm to optimize the equivalent stiffness of a one- and two-story-high structure by varying the green roof load under the equivalent horizontal force analysis in the Bogotá city. Through the MATLAB software, the optimization algorithm and the matrix analysis method of frame three-dimensional structures subject to compliance with the maximum drift proposed by the Colombian construction regulations are programmed and coupled. A maximum increase in equivalent stiffness of 19.25% and 57.80% (one-story structures), and of 11.12% and 32.97% (two-story structures) for green roof weights of 100 kg/m2 and 300 kg/m2 respectively, is necessary to meet regulatory requirements. It is expected that this research will serve as a starting point to generate constructive solutions for the implementation of green roofs in one- and two-story structures in the Bogotá city.

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Section: Introductionunclassified

Optimización de la rigidez equivalente en estructuras de uno y dos pisos sometidas a cargas de techos verdes

Bejarano

Hernández²,

Cepeda³

2023

RIC

View full text Add to dashboard Cite

show abstract

“…The amount of increased damping free water could add at an initial damping ratio of 2% was inconclusive, but it would still be worthwhile to track structural behavior with some amount of increased damping. Again, referring to Carmody's graph shown in Figure 5, at 50mm (about 2 inches) of added water, structures with an initial damping of 1% saw a damping increase of about 1.5% and structures with an initial damping of 0.5% saw a damping increase of about 2.2% (Carmody 2009).…”

Section: Model 4 -Full-scale Structure With Added Water Dampingmentioning

confidence: 80%

“…Figure 5 shows Carmody's results for damping ratio increase based on increased water depth. (Carmody, 2009).…”

Section: Figure 3 Snapback Testing Apparatusmentioning

confidence: 99%

“…In previous studies (e.g. De Stefano, 2007 andCarmody, 2009;Tam and Wong, 2021), the green roof was not explicitly modeled with respect to flexibility and/or damping. As a result, before testing a full-scale model, two versions of a smallscale model were analyzed to plan out the correct modeling approach.…”

Section: Figure 9 Stress Strain Plot Examplementioning

confidence: 99%

“…Using Carmody's approach, damping should increase due to free water at 2765 Ns/m per 1m 3 of water (Carmody, 2009). Upon trying to recreate the results he produced in number.…”

Section: Theoretical Reviewmentioning

confidence: 99%

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