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Designers' requirements of surface rupture parameters determination accuracy at trunk pipelines/active fault crossingsстатья
- Авторы: Temis M.Y., Strom A.L.
- Сборник: Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions
- Год издания: 2019
- Издательство: Associazione Electrotecnica ed Elctronica Italiana
- Местоположение издательства: Italy
- Первая страница: 5265
- Последняя страница: 5273
- Аннотация: Stress-strain state of 530 mm and 1420 mm trunk pipelines that have to cross active faults with normal, reverse and strike-slip kinematics and with single-event offsets up to 5 m was analyzed. Pipeline sensitivity to displacement variation was investigated for two types of trenches (with slopes 1:1 and 3:1) and for different backfill properties. Deformations of pipeline depend on the directions of fault walls motion relative to pipeline axis. Influence of each displacement component on the pipeline that crosses fault at an optimal angle was studied and threshold offsets for different kinematic types of surface faulting were determined. Fault displacements with which the pipeline remains in the elastic state were determined for different trench shapes and backfill materials. Displacement ranges for which significant increase of pipeline plastic deformations is expected and ranges for which deformations stabilize and do not increase with displacement growth were determined too. The obtained results allow optimization of the construction codes' requirements. They also help focusing site investigations on more accurate assessment of those parameters that affect pipeline stress-strain state at a maximal extent.1
- Добавил в систему: Стром Александр Леонидович