Reliability based safety assessment of buried continuıus pipelines subjected to earthquake effects

Download
2013
Yavuz, Ercan Aykan
Lifelines provide the vital utilities for human being in the modern life. They convey a great variety of products in order to meet the general needs. Also, buried continuous pipelines are generally used to transmit energy sources, such as natural gas and crude oil, from production sources to target places. To be able to sustain this energy corridor efficiently and safely, interruption of the flow should be prevented as much as possible. This can be achieved providing target reliability index standing for the desired level of performance and reliability. For natural gas transmission, assessment of earthquake threats to buried continuous pipelines is the primary concern of this thesis in terms of reliability. Operating loads due to internal pressure and temperature changes are also discussed. Seismic wave propagation effects, liquefaction induced lateral spreading, including longitudinal and transverse permanent ground deformation effects, liquefaction induced buoyancy effects and fault crossing effects that the buried continuous pipelines subjected to are explained in detail. Limit state functions are presented for each one of the above mentioned earthquake effects combined with operating loads. Advanced First Order Second Moment method is used in reliability calculations. Two case studies are presented. In the first study, considering only the load effect due to internal pressure, reliability of an existing natural gas pipeline is evaluated. Additionally, safety factors are recommended for achieving the specified target reliability indexes. In the second case study, reliability of another existing natural gas pipeline subjected to above mentioned earthquake effects is evaluated in detail.

Suggestions

Challenges and innovations for sustainable access to good quality drinking water
Goodridge, Amador; Kurt, Zöhre; Nelson, Kara; Smith, Charlotte (2018-12-12)
Water is the main source of life that every single person in the world needs to survive. All Latin- American countries rely on its natural resources; much of the water used in these countries especially drinking water is retrieved from those resources. However, there is a lack of detoxification studies for its water and soil. Contamination due to agricultural activates seems to find its cause in extensive use of pesticide and herbicide which infiltrate through the water from the soil and the contamination k...
Analyzing enhanced real-time uplink scheduling algorithm in 3GPP LTE-advanced networks using multimedia systems
Deebak, B. D.; Ever, Enver; Al-Turjman, Fadi (2018-10-01)
Third Generation Partnership Project (3GPP) standardizes the Long-Term Evolution (LTE) to improve the quality of service in modern communication systems using 3GPP LTE-advanced (LTE-A) networks. As this technology is converging with modern devices, efficient resource allocation schemes are essential for minimization of the communication delay for the sensitive real-time devices. To achieve the demands of latest technologies, this paper proposes two novel mechanisms, enhanced real-time polling system with co...
Multiscale in modelling and validation for solar photovoltaics
ŞENGÜL, ABDURRAHMAN; Turan, Raşit; YÜKSEL, FATMA; TAREQ, Abu Hamed; NADJA, Adamovic; URS, Aeberhard; NİKOLA, Bednar (2018-01-01)
Photovoltaics is amongst the most important technologies for renewable energy sources, and plays a key role in the development of a society with a smaller environmental footprint. Key parameters for solar cells are their energy conversion efficiency, their operating lifetime, and the cost of the energy obtained from a photovoltaic systemcompared to other sources. The optimization of these aspects involves the exploitation of new materials and development of novel solar cell concepts and designs. Both theore...
Optimizing the service policy of a mobile service provider through competitive online solutions to the 0/1 knapsack problem with dynamic capacity /
Erkılıç, Tuğçe; Uysal Bıyıkoğlu, Elif; Department of Electrical and Electronics Engineering (2014)
Demand for sustainable and environmentally friendly communication systems with energy efficient transmission schemes has increased eminently in the last decades. Resource allocation problems for energy harvesting networks have been studied and many offline solutions have been proposed. An online problem is examined throughout this thesis. Recent industry efforts to provide Internet service to areas deprived of telecommunications infrastructure have been the main inspiration for the studies conducted here. A...
Modeling of air pollution and development of air quality management plan for Iskenderun region in Turkey
Chaudhary, MT; Atımtay, Aysel (2003-05-01)
Clean air is considered to be a basic requirement for human health and their well- being. Air pollution has become an alarming problem with industrialization, and protection of air quality turned into a topic of great interest since early 1960’s. The United Nations Conference on Environment and Development (UNCED) held in 1992 at Rio de Janeiro, Brazil, adopted the Framework Climate Convention (Agenda 21) which underlined the need of air pollution control. Also, the declaration of Habitat II (United Nations...
Citation Formats
E. A. Yavuz, “Reliability based safety assessment of buried continuıus pipelines subjected to earthquake effects,” M.S. - Master of Science, Middle East Technical University, 2013.