A Simplified Approach for Site-Specific Design Spectrum

Author(s):  
A. Ansal ◽  
G. Tönük ◽  
A. Kurtuluş
2020 ◽  
Vol 10 (20) ◽  
pp. 7247
Author(s):  
Ercan Işık ◽  
Aydın Büyüksaraç ◽  
Yunus Levent Ekinci ◽  
Mehmet Cihan Aydın ◽  
Ehsan Harirchian

The Marmara Region (NW Turkey) has experienced significant earthquakes (M > 7.0) to date. A destructive earthquake is also expected in the region. To determine the effect of the specific design spectrum, eleven provinces located in the region were chosen according to the Turkey Earthquake Building Code updated in 2019. Additionally, the differences between the previous and updated regulations of the country were investigated. Peak Ground Acceleration (PGA) and Peak Ground Velocity (PGV) were obtained for each province by using earthquake ground motion levels with 2%, 10%, 50%, and 68% probability of exceedance in 50-year periods. The PGA values in the region range from 0.16 to 0.7 g for earthquakes with a return period of 475 years. For each province, a sample of a reinforced-concrete building having two different numbers of stories with the same ground and structural characteristics was chosen. Static adaptive pushover analyses were performed for the sample reinforced-concrete building using each province’s design spectrum. The variations in the earthquake and structural parameters were investigated according to different geographical locations. It was determined that the site-specific design spectrum significantly influences target displacements for performance-based assessments of buildings due to seismicity characteristics of the studied geographic location.


2014 ◽  
Vol 926-930 ◽  
pp. 3854-3857
Author(s):  
Xao Ling Zhang ◽  
Fang Li

Recently, the self-employed do not respect the land rights of farmers, forcing farmers to transfer land, free of illegal interception land transfer revenue; do not respect the wishes of farmers, forced recruitment of illegal occupation of farmer contracted land, to compensate for low prices, such as a very serious problem. Discussion from the institutional reasons, there are some flaws of the current land law system. From the theoretical construction site briefly describes the contents of the configuration pre-planning the construction site, the site specific design, site hardware and software facilities, administer the site core information website and promotion, website maintenance and other aspects of the latter.


2021 ◽  
Vol 19 (2) ◽  
pp. 105-115
Author(s):  
Cecilia O. Olima ◽  
Paul K. Muoria ◽  
Margaret A. Owuor

Mangroves are considered a highly productive blue forests resource providing services that are important to the community both locally and globally. In recent times there has been an increase in studies on valuation of ecosystem services provided by mangroves. However, there is need to provide a simplified approach to identify, assess and quantify ecosystem services. In this study the Toolkit for Ecosystem Services Site-based Assessment (TESSA) was used to assess the value of harvested goods provided by the mangroves of Mida Creek in the current state and under plausible alternative scenarios. Spatial methods (GIS) were used to collect data for the period 1985-2019, and household interviews were used to collect data on harvested goods. Descriptive statistics were used to summarize quantitative data. Results show that the estimated current annual value of harvested goods in Mida Creek is US$ 11.2 million. This value increased to US$ 14.3 million under the conservation scenario and reduced to US$ 10.9 million under the business as usual scenario (BAU). These findings add to the growing literature on ecosystem service valuation and the need to use site-specific non-modelling tools like TESSA.


2019 ◽  
Vol 62 (6) ◽  
pp. 1735-1742 ◽  
Author(s):  
Garey A. Fox

HighlightsStream-riparian interactions and preferential flow remain two “unsolved” problems in hydrology.Using mechanistic approaches enables analysis of stream and floodplain systems under future climatic extremes.Engineers should verify stream restoration designs with models that consider stream-riparian interactions.Riparian buffer design models should consider preferential flow and be more widely used for site-specific design. Keywords: . Climate Variability, Floodplain, Preferential flow, Process-based design, Riparian buffer, Stream restoration, Streambank erosion, Vegetative Filter Strip.


2001 ◽  
Vol 123 (4) ◽  
pp. 296-303 ◽  
Author(s):  
Peter Fuglsang ◽  
Kenneth Thomsen

A method is presented for site-specific design of wind turbines where cost of energy is minimized. A numerical optimization algorithm was used together with an aeroelastic load prediction code and a cost model. The wind climate was modeled in detail including simulated turbulence. Response time series were calculated for relevant load cases, and lifetime equivalent fatigue loads were derived. For the fatigue loads, an intelligent sensitivity analysis was used to reduce computational costs. Extreme loads were derived from statistical response calculations of the Davenport type. A comparison of a 1.5 MW stall regulated wind turbine in normal onshore flat terrain and in an offshore wind farm showed a potential increase in energy production of 28% for the offshore wind farm, but also significant increases in most fatigue loads and in cost of energy. Overall design variables were optimized for both sites. Compared to an onshore optimization, the offshore optimization increased swept area and rated power whereas hub height was reduced. Cost of energy from manufacture and installation for the offshore site was reduced by 10.6% to 4.6¢. This reduction makes offshore wind power competitive compared with today’s onshore wind turbines. The presented study was made for one wind turbine concept only, and many of the involved sub models were based on simplified assumptions. Thus there is a need for further studies of these models.


1988 ◽  
Vol 106 (2) ◽  
pp. 275-287
Author(s):  
A.K. Ghosh

Wind Energy ◽  
10.1002/we.61 ◽  
2002 ◽  
Vol 5 (4) ◽  
pp. 261-279 ◽  
Author(s):  
P. Fuglsang ◽  
C. Bak ◽  
J. G. Schepers ◽  
B. Bulder ◽  
T. T. Cockerill ◽  
...  

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