UNIFIED APPROACH TO ESTIMATION OF SEISMIC RESISTANCE OF CONFINED MASONRY BUILDINGS AND REINFORCED CONCRETE FRAME BUILDINGS WITH NONBEARING INFILL

Oleksiy Murashko

Abstract: The work is dedicated to designing of unified approach to estimation of actual seismic resistance of structures with reinforced concrete flat slabs frames with diaphragms and cores and confined masonry buildings. This investigation is on the agenda, because of large non-conformities of field test results by determination of natural vibration periods of buildings to computational analysis results. Some times this differences exceeds 100%. On the other side difference between field tests and FEM (Finite element method) models for confined masonry buildings does not exceed 8%. The main reason of such differences is nonbearing infill of reinforced concrete frames that mainly consists of AAC (Aerated Autoclave Concrete) that work as a diaphragm. The final purpose of computer modeling of buildings behavior under seismic effects is creation of a reliable model of a building describing its real operation, and it was decided to carry out a series of computational and field experiments for development of recommendations for creation of a reliable model of buildings that takes into account nonbearing elements. Paper describes series of calculations and field tests of structures with reinforced concrete flat slabs frames with diaphragms and cores and confined masonry buildings aimed on harmonization of calculation schemes. And unified approach for both of the schemes helps to solve the problem of disparity. This work is a continuation of investigations on development of estimation system of actual seismic resistance of buildings and it is a component of the second level of estimation – certification of seismic stability.

Keywords: Confined Masonry, Flat Slab, Computational Model, , Nonstructural Elements, Vibration Tests

DOI: https://doi.org/10.15623/ijret.2017.0601013