Rodolfo Sancio

Geosyntec Consultants Inc

Objectives/Scope: Tsunamis are often caused by seafloor expressions of fault rupture following an earthquake. Examples include the March 2011 Tohoku earthquake in Japan and the 2004 Aceh earthquake in Indonesia. However, numerous examples of tsunamis caused by submarine mass movements are also available, such as the aseismic 1979 Nice tsunami. Mass...

Although numerous studies have been conducted, a recommended practice for incorporation of earthquake loading into the geotechnical design considerations for subsea structures such as wells, manifolds, and PLETs, and pipelines is not consistent. Industry guidance provided in ISO 19901-2 and the more recent API adoption, RP2EQ, provide performance-b...

Under the Pacific Ocean off the south coast of Peru the Nazca tectonic plate subducts beneath the South American plate, creating a high seismic hazard along this coast. Onshore site development and preparation for LNG plant and export terminal construction in this area required a significant volume of excavation throughout the process area and stor...

An offshore geotechnical site investigation was completed for a proposed natural gas development located offshore northern Mozambique, a location with no prior history of soil characterization. A comprehensive field exploration program complemented with a geotechnical laboratory testing program was therefore performed to characterize these clays, w...

An ice gouge on the seafloor transmits loads to a buried pipeline via the soil, even if the burial depth is greater than the gouge depth. To validate finite element models that capture this, tests have been carried out at as large a scale as practical, using rigid indenters as ice keels. This papers covers tests performed in clay including a buried...

Three potential lateral spreads exhibited negligible displacements during the 1999 Kocaeli, Turkey Earthquake Mw = 7.5 even though they were located within 7 km of the fault rupture. These spreads are analyzed to verify and augment current procedures for predicting liquefaction resistance and lateral spread displacement. The sites include Çark Cana...

Three potential lateral spreads exhibited negligible displacements during the 1999 Kocaeli, Turkey Earthquake ͑M w = 7.5͒ even though they were located within 7 km of the fault rupture. These spreads are analyzed to verify and augment current procedures for predicting liquefaction resistance and lateral spread displacement. The sites include Çark C...

A subscour soil displacement model is a key component to determine the safe burial depth of offshore pipelines in ice scoured environments. In order to calibrate numerical models and physical tests carried out in geotechnical centrifuges, 3D ice scour tests were carried out in a dredging flume at a scale approaching that of observed scour depths in...

Observations from recent earthquakes and the results of cyclic tests indicate that the Chinese criteria are not reliable for determining the liquefaction susceptibility of fine-grained soils. Fine-grained soils that liquefied during the 1994 Northridge, 1999 Kocaeli, and 1999 Chi-Chi earthquakes often did not meet the clay-size criterion of the Chi...

Valuable cases were presented regarding seismic performance of the shallow mat foundations of building structures in Adapazari, Turkey, during the 17 August 1999 Kocaeli ͑İzmit͒ earthquake. The authors attributed the occurrence of displacements of various forms and levels of the mats essentially to the liquefaction or cyclic softening of the satura...

The penetration resistance of a sandy soil, as measured by the Standard Penetration Test (SPT), is extensively used in geotechnical engineering. There are many factors that influence the energy transmitted to the rod string and sampler by the impact of the hammer on the anvil and thus affect the value of the blow count or N-value. This paper presen...

Ground failure in Adapazari, Turkey during the 1999 Kocaeli earthquake was severe. Hundreds of structures settled, slid, tilted, and collapsed due in part to liquefaction and ground softening. Ground failure was more severe adjacent to and under buildings. The soils that led to severe building damage were generally low plasticity silts. In this pap...

The building losses in Adapazari following the 17 August 1999 Kocaeli earthquake are estimated for both ground-shaking and ground-failure induced damage and the predictions compared with field observations. The ground-shaking damage is estimated using the capacity spectrum approach and accommodating the results of a previously published calibration...

Over the past decade, major advances have occurred in both understanding and practice with regard to assessment and mitigation of hazard associated with seismically induced soil liquefaction. Soil liquefaction engineering has evolved into a sub-field in its own right, and engineering assessment and mitigation of seismic soil liquefaction hazard is...

Ground failure in Adapazari, Turkey during the 1999 Kocaeli earthquake (Mw=7.4) was severe. In four central downtown districts, where more than 1200 buildings collapsed or were heavily damaged, hundreds of structures tilted and penetrated into the ground due in part to liquefaction and ground softening. Based on a multi-institutional subsurface inv...

This paper presents a study of liquefaction-induced ground deformations at the Hotel Sapanca site during the 1999 Kocaeli (Izmit)—Turkey earthquake. The paper discusses: (1) observed ground deformations and displacements after the earthquake, (2) the results of field investigations by means of borings and in situ index tests including standard pene...

An earthquake of moment magnitude (M-W) 7.0 struck the central region of Mexico on 15 June 1999 between the states of Puebla and Oaxaca. A second event with a moment magnitude 6.3 occurred on June 21, also affecting the central region of Mexico but with minor consequences. Attenuation relationships of peak ground acceleration with hypocentral dista...

A large number of structures collapsed and were damaged due to strong ground shaking during the August 17, 1999 Kocaeli earthquake. Many buildings were also affected by ground failure due to liquefaction of shallow silt deposits. Ground failure was indicated by relative vertical displacement of the building into the ground, tilt, and lateral transl...

ZET 17 Agustos 1999 Kocaeli, depremi (M w = 7.4) özellikle sivilasmis zeminlerde zemin davranisinin modellenmesinde çok büyük olanaklar vermistir. Adapazari'nda seçilen 12 ayri sahada yüzeysel temellerin ve zemin davranisi detayli dökümantasyon ve arastirma programi ile incelenmistir. Bu çalisma kapsaminda temel zemininin statik penetrasyon (CPT) d...