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"Development of the design of composite-monolithic antiseismic belts of buildings and methods of their calculation, taking into account the action of seismic forces"


Author: Dumitriuc Avrel
Degree:doctor of engineering
Speciality: 05.23.01 - Building Elements and Buildings
Year:2019
Scientific adviser: Ion Rusu
doctor habilitat, professor, Technical University of Moldova
Institution: Technical University of Moldova

Status

The thesis was presented on the 11 October, 2019 at the meeting of the Scientific Council and now it is under consideration of the National Council.

Abstract

Adobe PDF document2.53 Mb / in romanian
Adobe PDF document2.92 Mb / in russian

Thesis

CZU 69.059:725/728

Adobe PDF document 10.47 Mb / in russian
213 pages


Keywords

earthquake-resistant building, anti-seismic precast-monolithic belt, stone and block walls, multi-storey construction, tests, calculations

Summary

Thesis structure: introduction, four chapters, conclusions and recommendations, a list of literature from 148 titles, set out on 149 pages of printed text, contains 87 figures, 3 tables. The main research results are published in 9 scientific works, 7 inventions, 1 application for an invention.

Field of study: - seismic resistance of buildings with stone walls.

The purpose of the work: - development of an effective, technologically advanced design and calculation methodology, antiseismic precast and monolithic zones of buildings.

Object: - AC belts of buildings with stone walls and methods of their calculation.

Subject: - manufacturability and compatibility of the work of the precast element with cast concrete belts in the ultimate state, taking into account the window sills, changes in the rigidity of the walls and the progressive destruction of the weakest piers.

Tasks: - study of seismic resistance of buildings with stone walls; - development of entiseseismic belts of precast-monolithic construction and experimental investigations of their strength, deformations and cracks; - numerical studies of the strength of the belts in buildings; -development of methods of their construction and calculation.

Scientific problem: - the lack of an effective, highly technological design and method of calculation, the anti-seismic precast-monolithic belts of buildings, which ensure the combined operation of the prefabricated blocks with monolithic concrete of the core and as a whole with the walls, up to the stage of destruction.

Scientific novelty and originality. A precast-monolithic design of antiseismic belts of buildings (the author's invention) was developed, ensuring the combined operation of the precast hollow block and a monolithic core (edges along its entire height) up to the stage of destruction, significantly increasing its carrier (up to 2 times) ability to. A solid contact of a monolithic beam with a wall located below reaches 70 ÷ 75% of the total belt bearing area, with a norm of ≥ 60%. A technique has been developed for the design and calculation of the proposed belts, taking into account the action of seismic forces, according to their limiting conditions, preventing progressive destruction of the walls.

Fundamentally new results for science and practice. The design of anti-seismic precastmonolithic belts and the method of their calculations increase the seismic resistance of buildings. They are practically applicable in buildings with stone and frame-stone walls, as well as in monolithic, prefabricated-monolithic, frame buildings with different walls, diaphragms and free spans.

The introduction of scientific results. The developed design of the belts is used in the construction of a 9-storey complex residential building in Chisinau, the outside Ion Soltâs.