Improving the design and calculation methods of precast-monolithic anti-seismic belt of buildings
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2017, Vol 1, Issue 66
Abstract
The article is devoted to seismic resistance of buildings with new precast-monolithic belts. They, unlike monolithic ones, are performed in one cycle together with the laying of floors, without formwork and without interruption (7 days), required for setting up to 70% of the design strength of the concrete platform for laying floors. Armature and concrete of the monolithic core of the belt are laid without technological scaffolds, directly from the floors. Unlike analogues, the new belt ensures the joint work of its constituent elements before the stage of destruction. It also provides a strong contact of a monolithic core with the underlying wall of at least 70 ... 80% of the total reference area of the belt. It reduces the expense of reinforcement. Such precast-monolithic belts can be used in multi-storey buildings with stone or block walls. The tests allowed to introduce a new precast-monolithic belt in the construction of the building of 132 flats. The results of the tests made it possible to develop various options of precast-monolithic belts. They can be used in walls of various thickness (200...400 mm or more) at normal and elevated loads. In addition, the calculation technique of the contact seam strength of their concretes is developed. Also the methods are developed to determine the efforts of the zones during the calculation of buildings under seismic loading taking into account the non-linear behaviour of the masonry and prevention of the pro-gressive collapse of piers.
Authors and Affiliations
A. Dumitryuk
Keywords
Related Articles
- EP ID EP314832
- DOI -
- Views 156
- Downloads 0
Classification of damages and imperfections of joints in steel structures under dynamic loading action
The places with a high level of stresses are the main reason of fatigue cracks appearance in joints of steel structures under dynamic loading. Modern normative classification tables in general have no numeric description...
Buildings deformation state assessment within the limits of densely built-up area under the fixed geological engineering conditions
The article deals with five buildings within the limits of the densely built-up area in the city of Lviv being situated within the limits of this group from 45 to 90 years. From a present-day point of view one of the bui...
investigation of the properties of the portlandcement of different mineral composition with superplastificators of various type
A binder plays an important role in providing high quality concrete. The change in the mineral composition and fineness of cement grinding leads to disturbances in the colloid-chemical processes of interaction between a...
Experimental studies of work of compressed ferro-concrete damaged columns of various flexibility
In the course of the studies carried out, the experiment was planned for the three most significant factors affecting the residual load-bearing capacity of damaged reinforced concrete columns of rectangular cross-section...
New method of soil tests with piles by load relaxation method
The stress relaxation method is recommended as one of the rapid soil tests with piles in the State standard of Ukraine. There is a number of contradictions and conditional assumptions in the instruction that prevent its...