Research and Development

 

 

± GeoDestek Zemar is conducting research and development (R&D) studies in order to advance new technologies which can ensure more efficient, more secure and more accurate engineering applications. In order to increase the efficiency of these studies, GeoDestek has widened its spectrum of activites by opening its METU Technopolis office at early 2012.

GeoDestek Zemar R&D studies cover the topics of field measurement systems, innovative laboratory experiment equipments, and development of software and methodologies focusing on seismic hazard and risk assessment as well as geotechnical engineering areas.

± TapeExtensometer
GeoDestek Zemar has been developing a geotechnical site monitoring system which can be used both during design phase and performance tracking phase. Site monitoring during planning, design, construction and operation phases provides significant benefits from both economical and safety aspects.

Arising from the fact that local production is insufficient in meeting the industry demand, the first equipment manufactured within the scope of this project is tape-extensometer. Tape extensometers can monitor the convergence in the tunnel face, measure the deformations occuring due to the underground excavations and measure the precise distance between the reference points of retaining walls, bridge bearings and similar reinforced concrete structures. The first test applications were succesfully completed within the scopes of Ankara and İzmir subway projects.

± Cyclic Axially Loaded Torsional Shear Testing Setup
GeoDestek Zemar, emphasizes on developing innovative and specific purpose laboratory experiment equipments rather than the mass production of standard laboratory equipment. In accordance with this target, torsional shear testing setup with cyclic axially loading mechanism is developed. The setup aims to model the actual load conditions that the foundation soils under structures will face under dynamic loading conditions, and to enhance research on dynamic soil behaviour. This testing setup system includes a mechanism which can perform 2 dimensional cyclic loading and control the soil stiffness using stress measurement in the 3rd dimension in order to model realistic earthquake loading conditions. Test runs using this prototype test apparatus has been successfully completed in METU Civil Engineering Department Soil Mechanics Laboratory.

Although many global companies have been working on the development of experimental systems for so long, any similar setup to the system described in this project has yet to be encountered in product catalogs. GeoDestek is proud to be a major pioneer in this field, and is hopefully looking forward to experience the long term positive outcomes of these innovative efforts in developing experimental systems targeted at assisting cutting edge geotechnical research.

± Seismic Hazard and Risk Assessment Software
Seismic hazard and risk assessments is an efficient method by which most of the insurance companies question the vulnerability of their current building/structure stocks after an earthquake and evaluate the insurance premia of their clients. Within the scope of the risk assessments for the selected site or area, seismic hazard assessment constitutes the first stage. Since there is a great deal of uncertainty about the location, size, and resulting shaking intensity of future earthquakes, seismic hazard framework acts as a robust tool to quantify those uncertainties and combine them to produce an explicit description of the distribution of future shaking.

Thus seismic risk at a site or region will be defined as the integration of probability of damage potential of the structure of interest and the probability of shaking at the site. This will allow the prediction of future property damage, casualties and any type of loss after earthquakes. As this demand for systematic approach requires implementation of computer software, GeoDestek Zemar has prioritized its efforts towards developing a seismic hazard and risk calculation tool for meeting the needs of the engineering industry. The current state of the software is capable of running a classical probabilistic hazard problem using current state of the art, and some additional features such as 3-D fault geometry definitions, integration with geomechanics problems such as nonlinear effective stress based foundation behaviour including soil liquefaction. Efforts in transforming a code compilation into a desktop software are underway.

± Developing Dynamic Module for RocScience Commercial Software
Numerical models are widely used in today's applications of geotechnical engineering during design and evaluation stages. However, the existing tools are also known for their questionable performance under dynamic loading conditions (such as seismic loads).

On the other hand, dynamic analysis is undoubtedly becoming an integral part of large number of important and critical projects. A project has been initiated to integrate latest state of the art in geotechnical earthquake engineering with readily available commercial software. The project includes the development of a dynamic module which is to be implemented within the geomechanics software suite of Rocscience Inc, one of the most reputable players in geomechanics software industry.