Probabilistic Seismic Risk For Buildings And Other Structures Essay

Probabilistic Seismic Risk For Buildings And Other Structures Essay

Length: 973 words (2.8 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

5. Risk AnalysisEquation Chapter 5 Section 1
Probabilistic seismic risk (of damage) assessment is becoming the basis for longer-term approaches for buildings and other structures.
According to N.Luco[2011], the latest edition of the American Society of Civil Engineers (ASCE) standard entitled “Minimum Design Loads for Buildings and Other Structures” (ASCE 2010) defines Risk-Targeted Maximum Considered Earthquake ground motion maps for the United States (US) by explicitly targeting a probabilistic 1% risk of collapse in 50 years, an approximation of the lifespan of a building. These probabilistic risk-based maps have since been adopted for inclusion in the 2012 International Building Code ( International Code Council 2012). Moreover, the next generation of performance-based seismic design procedures for new and existing buildings being developed by the Applied Technology Council use probabilistic risk of earthquake-caused deaths, dollars (repair costs), and downtime (repair duration) as metrics for seismic performance assessment of buildings.
The Advanced Seismic Assessment Guidelines developed by Bazzurro et al (2006) use the probability that an aftershock ground motion will exceed the capacity of a damaged building after a main-shock (treated deterministically for simplicity) as a rational criterion for deciding whether and when to permit re-occupancy of the building.
This chapter introduces the methodology for post-main-shock probabilistic risk assessment that we propose in order to develop a computational tool for automatic assessment.
The core of this methodology is that the risk integral couples (1) ground motion hazard results for the location of a structure of interest with (2) k...


... middle of paper ...


...x)=∫_S▒〖f_(x│r) (x│r) 〗 f_r (r)dr=1/(σ_lnPGA∙x) ∫_S▒〖∫_(m_min)^(m_m)▒φ((lnx-Ψ(r,m))/σ_lnPGA ) f_m (m)f_r (r)drdm〗 (5.7)

Then we can substitute this in the aftershock risk equation.
However, the risk of equation 5.5 cannot be directly compared with the time-independent risk in equation 5.1 because the latter is the annual data.
So we shock transfer equation 5.5 to an equivalent annual risk which is shown below

(λ_(i,3)^a ) ̃(t,M_min,M_m )=T_1y/(T-t) ∫_t^T▒〖λ_(i,3)^a (τ)dτ〗=[T_1y/(T-t) ∫_t^T▒〖α_a (τ,M_min,M_m )dτ〗]*P_(i,n)=(α_a ) ̃(t,M_min,M_m )*P_(i,n) (5.8)


(λ_(i,3)^a ) ̃(t,M_min,M_m ) is the annual rate of transitions from the i-th damage state to structural collapse, or risk. T_1y =365 is the length of one year in units of days. t is the elapsed time from the main-shock event. T is the estimated duration of the aftershock sequence.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Analyzing The Seismic Hazard Maps Essay example

- Information and records presented in this paper is describing the seismic hazard maps. Ground condition effect for the earthquake, and buildings react due to shaking will also be shown in this journal. It is significance for engineer to predict the damage of earthquake, and engineers also improve the techniques and theories to make structures safer. KEYWORDS: seismic hazard map; earthquake; collapse; building; damage; seismic wave Introduction The continental drift theory and plate tectonics theory was first put forward by the German geologist and meteorologist Alfred Wegener at the beginning of the 20th century....   [tags: Earthquake, Plate tectonics]

Better Essays
1720 words (4.9 pages)

The Continental Drift Theory And Plate Tectonics Theory Essay

- Background The continental drift theory and plate tectonics theory was first put forward by the German geologist and meteorologist Alfred Wegener at the beginning of the 20th century. He proposed that there was a single continental in 200 million years ago, and the Earth’s crust slowly separate to pieces by the centrifugal pseudo force because of the rotation of the Earth. On the basis of plate tectonics theory there are two components in the Earth which are lithosphere and asthenosphere, the upper layer is lithosphere and the lower layer is asthenosphere....   [tags: Earthquake, Plate tectonics, Seismic hazard]

Better Essays
1331 words (3.8 pages)

Damage Estimation: Earthquake Resistant Buildings Essay examples

- ... 1972), Tabas (Berberian 1979; Berberian et al. 1979), Golbaft (Adeli 1982 ), and Manjil (Tsukuda et al. 1990) earthquakes were adopted to the damage estimation by Karimi (2011). In the damage estimation process, it was supposed that the main structures having key roles in the emergency and relief operation (e.g. hospitals, fire stations, etc.) had been retrofitted. b. Human casualty estimation considering north Tehran fault scenario earthquake The number of fatalities due to the Niavaran fault earthquake scenario was also estimated by JICA (2000) and updated by Karimi (2011)....   [tags: seismic force, tehran, emergency]

Better Essays
989 words (2.8 pages)

Recycling of Waste Buildings Essay

- Introduction In nature there is a system, which operates, in such a way that there is no waste. Nutrients and metabolisms go through a cycle, going through different transformations. One simple cycle is the process of exhalation of carbon dioxide. Animals and human beings exhale carbon dioxide, which is taken in by plants, as it is an important component for its food making process called photosynthesis. Leaves that fall to the ground are naturally broken down into nutrients for the soil and fertilisers for trees....   [tags: Buildings as Living Organisms]

Better Essays
3050 words (8.7 pages)

The New Madrid Seismic Zone Essay

- According to the United States Geological Survey (USGS), the New Madrid Seismic Zone (NMSZ) stretches from just west of Memphis TN., into southern Illinois and “several of the largest historical earthquakes to strike the continental United States occurred in the winter of 1811-1812 along the NMSZ. (USGS, 2007). This means when another major earthquake hits the region, cities like Memphis TN., Cape Girardeau and St. Louis MO., Paducah KY., and perhaps Nashville TN. and Little Rock AR., will be severely impacted....   [tags: Impact, Damage, Earthquake]

Free Essays
448 words (1.3 pages)

Analyzing How Buildings Affect Physical and Mental Health Essay

- According to Bokalders and Block (2009) some people spend more than 90 percent of their live indoors. This represents that those who live or work in buildings may be significantly influenced by them. Materials which are utilized in the erection of buildings, also interior design of buildings, providing clean air and intensive light are important issues to be taken into account, because their quality has considerable impact on residents. Rostron (2008) claims that adverse effect of a building can cause a considerable implication for society: many of those who suffered from ‘sick buildings’ have complained that their productivity had reduced by 20 percent....   [tags: Construction, Buildings, Interior Design]

Better Essays
1997 words (5.7 pages)

Preservation and Restoration of Historical Buildings Essay examples

- There are a lot of abandoned historical buildings in cities around the state. These buildings can be used for public uses instead of being demolished and replaced with newer buildings. Instead of allowing historical landmarks to become abandoned blights, or destroy them and lose the history forever, steps can be taken to incorporate them into the modern world through reinvention. This preservation will not only preserve the historical sites but turn them into active, valuable sites for the future....   [tags: Preserving Historical Buildings]

Better Essays
1028 words (2.9 pages)

Heinrich Tessenow's Haus des Architekten in Berlin and Other Buildings Essay

- The Haus des Architekten (house of the architect) was built in 1930 and situated in Zehlendorf, 3km North of the Berlin border and 13km South-West of Berlin city-centre. The area of Zehlendorf is a well-educated and affluent area of Germany, also with some of the most remarkable natural scenery in Berlin. The site of the house is 100m from the west entrance to the street Sophie-Charlotten-Straße built on a plot of land surrounded by trees setback from the road. The architect of the house: Heinrich Tessenow (1876-1950) was a German architect who studied as an apprentice carpenter before studying architecture at a building trade school in Leipzig, followed by the technical University of Munic...   [tags: Heinrich Tessenow, Haus des Architekten, Berlin, a]

Better Essays
1228 words (3.5 pages)

A Probabilistic Location Model for an Emergency Medical Service System Essay

- ... Berger, S., 2008. Fundamentals of healthcare financial management. New York: John Wiley & Sons. Berman, O., Krass, D. & Wang, J., 2011. Stochastic Analysis in Location Research. In: H. A. Eiselt & V. Marianov, eds. Foundations of Location Analysis. New York: Springer Science+Business Media, pp. 241-271. Brandeau, M. & Chiu, S., 1989. An overview of representative problems in location research. Management Science, Volume 35, pp. 654-674. Brandeau, M. L., Sainfort, F. & Pierskalla, W. P., 2005....   [tags: servicing patients from different demand points]

Better Essays
1190 words (3.4 pages)

Essay on Doubles in Fight Club and Cofer's The Other

- Doubles in Fight Club and Cofer's The Other        In the current age of technology and capitalism, many people get caught up in trying to define their individuality with mass produced goods.  In David Fincher's movie Fight Club, the narrator, who is commonly referred to as Jack, invents an alter ego to serve as a source of substance in the hallow world of corporate America. This alter ego, named Tyler Durden, is portrayed as a completely psychologically and physically separate being throughout the movie.  The inherent polarity in personality between these two personas proves to be a crucial point of interaction between the two characters, and is the basis for most of the action...   [tags: Fight Other]

Better Essays
1292 words (3.7 pages)