Deterministic Seismic Hazard Analysis

There are two different methods for quantifying the seismic hazard - based on deterministic approach and probabilistic approach. The deterministic seismic hazard analysis (DSHA) does not consider the uncertainties involved in the earthquake occm-rence process like the recurrence rate, magnitude uncertainty, attenuation characteristics of seismic waves etc. and gives the worst scenario of ground acceleration. Probabilistic seismic hazard analysis (PSHA) incorporates the uncertainties involved in the earthquake occurrence process. Since the uncertainty in earthquake occurrence is fully accounted in this method, this method is being widely followed for the evaluation of seismic hazard. The PSHA method adopted in this study... 

Deterministic Seismic Hazard Analysis (DSHA) analysis is simple and more prevalent methods of hazard analysis in geotechnical earthquake engineering. DSHA involves the development of a particular seismic scenario upon which a ground motion hazard evaluation is based. The scenario consists of the postulated occurrence of an earthquake of a specified size occurring at a specified location. DSHA is more logical, more transparent, and more appropriate for requirements in engineering design. DSHA... 

Deterministic seismic hazard analysis involves the following steps (Reiter, 1990) which are discussed in detail in the succeeding sections. 

Seismic hazard analysis can be performed using two approaches, namely, deterministic seismic hazard analysis (DSHA) and probabilistic seismic hazard analysis (PSHA). Both use similar information to determine the design earthquake, while other hazard levels can also be established. Basic elements of deterministic analysis are also included in the probabilistic approach. The main difference is that the probabilistic approach takes into account the uncertainties and the likelihood of an actual earthquake exceeding the design ground motion. Examples of the outcome of the two approaches are as follows (FEMA-451B 2003) ... 

Deterministic seismic hazard analysis The earthquake hazard for the site is a peak ground acceleration of 0.24 g resulting from an earthquake of magnitude 6.0 from a specific fault at a distance of 50 km from the examined site. ... 

Deterministic seismic hazard analysis Earthquake geology Earthquake hazard analysis Paleoseismology Probabilistic seismic hazard analysis Seismic hazard analysis Seismic hazard assessment... 

Deaggregation Deterministic seismic hazard analysis Ground motitm prediction equations Hazard curve Hazard spectra Probabilistic seismic hazard analysis, PSHA Seismic hazard... 

Wang Z, Cobb JC (2012) A critique of probabilistic versus deterministic seismic hazard analysis with special reference to the New Madrid Seismic Zone. In Cox RT, Tuttle MP, Boyd OS, Locat J (eds) Recent advances in North American paleoseismology and neotectonics east of the Rockies. Geological Society of America special paper, vol 493. pp 259-275... 

Deterministic seismic hazard analysis 5K damping, spectra for horizontal motions ... 

In France, the reference law for seismic hazard studies is the RFS 2001-01. It provides the details describing the methodology specifically for seismic hazard analysis. The RFS 2001-01 is based on the deterministic approach, the most commonly used methodology in the seventies and eighties. The rule is based on a definition of the characteristics of Maximum Historically Probable Earthquakes considered to be the most penalizing earthquakes liable to occur over a period comparable to the historical period, or about 1,000 years. Secondly, it defines the Safe Shutdown Earthquakes . In the last few years the probabilistic approach has been used and accepted for the reevaluations of the seismic hazard of existing sites. 

Kiinitzsky EL (1995) Deterministic versus probabilistic seismic hazard analysis for critical structures. Eng Geol 40 1-7... 

Progression from Deterministic to Probabilistic Seismic Hazard Analysis... 

Estimating fault displacement is a key issue to design tunnels crossing active faults. One option to estimate fault displacement is using empirical relationships that express expected displacements in terms of some source parameter. Deterministic and probabilistic fault displacement hazard analyses can be used to assess fault displacement hazard where a displacement attenuation function is used in a probabilistic seismic hazard analysis (Coppersmith and Youngs 2000 Youngs et al. 2003). 

The modeling of earthquake-induced damage can be either probabilistic or deterministic or, since seismic risk assessment is a multistep process, a combination of both. The benefit of probabilistic analysis is that they can account for the many xmcertainties associated with seismic risk assessments of infrastructure. These include xmcertainties in the quantification of seismic hazard, the relationship between seismic hazard and component damage, and the relationship between component damage and component functionality. 

---