Tag:seismic forces

№4|2013

ADVANCED TECHNOLOGIES AND EQUIPMENT

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UDC 621.643:691.175.699.841

Granovsky A. V., Dottuev A. I., Khasanov T. M.

Investigating seismic stability of REHAU cross-linked polyethylene pipelines

Summary

The results of experimental evaluation of seismic stability of REHAU pipelines of different trademarks and diameters are presented. The experiments were carried out on a vibroplatform of pendulum type with two degrees of freedom. The pipelines were filled with water at 10–95 C temperature and 7–11 bar pressure. From the experimental tests (impact tests and repeated pulse tests) the integrity of pipelines made of cross-linked polyethylene at vibration and frequency-amplitude range equal to 7–9 numbers on the MSK-64 scale was evaluated.

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№06|2015

WASTEWATER SYSTEM RELIABILITY

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UDC 628.218

Chupin R. V., Gor'kov E. A.

Improvement of the integrity  and seismic resistance of gravity sewers

Summary

The problems of improving the integrity and seismic resistance of wastewater disposal systems have been urgent and must be solved in the process of designing prospective plans of territorial and urban development as well as investment programs of public utilities. The procedure of wastewater system structure optimization based on developing redundant layout and searching the maximum flow of the minimum weight function (minimum cost, maximum integrity and seismic resistance) is suggested. Redundant layout is developed by overlapping the predesigned sewer routes. The integrity is evaluated by the quantitative index – raw sewage amount that is generated for the certain time period as a result of an accident and pipeline rehabilitation time. Seismic resistance is taken into consideration by increasing failure rate depending on the earthquake intensity and orientation of the seismic impact. The suggested procedure takes into account seismic impacts by increasing the length of the designed sections of the redundant sewer layout. It is shown that construction of subsidiary and loop sewers improves significantly the integrity and seismic resistance of sewers.

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Журнал ВСТ включен в новый перечень ВАК

Шлафман В. В. Проектирование под заданную ценность, или достижимая эффективность технических решений – что это?

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