confined masonry buildings are used in rural and urban areas of iran. they performed almost satisfactoryduring past moderate earthquakes of iran. there is not a methodology in iranian seismic code (standard 2800-3rdedition) to estimate their capacities quantitatively. in line with removing this constraint, an attempt is made to studyin-plane behavior of two squared confined masonry walls with a...

One of a feasible and efficient method to retrofit structures is spraying shotcrete which is widely applied around the world. Shotcrete is concrete with fine aggregates which are sprayed through a hose and by air pressure coat at high velocity onto a surface. In the current research, three masonry schools from different regions of Iran are selected. The retrofitted wall surfaces have been prepa...

Block models have been shown to provide a realistic representation of the behavior of many types of masonry structures under static and dynamic loads. When the strength of the units is such that movements along the joints govern the behavior, it is acceptable to make the simplifying assumption that blocks act as rigid bodies. This assumption is particularly useful when dealing with seismic prob...

Non-linear dynamic time history analysis is considered as the most advanced and comprehensive analytical method for evaluating the seismic response and performance of multi-degree-of-freedom building structures under the influence of earthquake ground motions. However, effective and accurate application of the method requires the implementation of advanced hysteretic constitutive models of the ...

Many buildings built in Italy the 60s and 70s need an energy requalification at same time improvement of seismic behaviour. A non-invasive method for a joint consists anti-seismic plaster layer thermal coating. In this work, multi-layer package 3 cm SFRM coating 8 wood fiber placed on 20 masonry wall is analyzed. Numerical experimental analysis allowed to characterize wall, determine influence ...

CLT panels have been investigated for reinforcement of existing masonry-infilled RC framed buildings through the increase overall lateral stiffness structure, thus reducing story drift demand. The contribution depends on connection to frame elements. This paper evaluates role connectors by which is attached frames capacity, ductility, and energy dissipation structure its elements separately usi...

Though flexible diaphragms play a role in the seismic behaviour of unreinforced masonry buildings, effect connections between floors and walls is rarely discussed or explicitly modelled when simulating response such buildings. These are most commonly timber made planks beams, which supported on recesses can slide friction resistance reached. Using equivalent frame models, we capture effects bot...

the present article seek to investigate the function of elliptical steel damper function in steel frames seismic resisting. the elliptical damper is a kind of earthquake energy dissipater in structure which acts based on the steel yielding feature. thus, this damper in frame lateral displacement mechanism is expected to have a satisfying hysteretic behavior in terms of energy absorption is on a...