Critical Review of Physical Modelling of Snow Accumulation on Roofs With Arbitrary Geometry

Abstract

A review of the most significant domestic and, due to numerical superiority, foreign works on physical modelling of snow transport and snow accumulation processes, in particular, for the purpose of determining snow loads on roofs with arbitrary geometry, is presented. The existing practice of development of recommendations on assignment of snow loads in Russian laboratories is considered and critically evaluated. Comparison of do-mesticworks with scientific articles in the advanced world scientific journals and foreign regulatory documents leads to unfavorable conclusions. Recommendations on assigning snow loads, issued by Russian laboratories on the basisof extremely outdated and poorly substantiated methodology, bear a serious risk for evaluating mechan-ical safety of modern structures, for which such recommendations are developed. Recommendations are offered to remedy this current dangerous practice. The article also gives some suggestions on forming a basis for field observations of snow loads on existing roofs.

Calculation for the progressive collapse of the steel frame based on the shutdown of an element of the structural scheme

“…In design and research calculations for progressive collapse, a certain number of approaches to the formation of design schemes are used [11,12]. A spatial design scheme of the entire building is being built.…”

Numerical Modelling of Snow Deposits and Snow Transport on Long-Span Roofs for Steady and Unsteady Flow

“…In this regard, a methodology has been developed that allows to model snow transport and snow accumulation on large-span roofs of by means of numerical simulation of saltation, the results of which can then be used in combination with the building code recommendations for determining the design roof shape coefficient . Based on our previous studies ( [1,2,3]), a decision was made to use the erosion-deposition model to simulate saltation. Since it describes the change of the height of the snow surface in time, the methodology was initially developed for unsteady flow.…”

Численное Моделирование Снеговых Нагрузок. Особенности И Перспективы Развития Методики

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