Mihail Garevski

Institute Of Earthquake Engineering And Engineering Seismology · Dynamic Laboratory

Shaking-table tests of various upgrade systems applied on existing two-story RC structures have been performed at the Institute of Earthquake Engineering and Engineering Seismology-IZIIS, Skopje. The influence of each different upgrade system on the integral structural behavior has been investigated comparatively, conducting a total of 177 dynamic...

Until recently the design philosophy of building structures followed sets of prescribed rules implemented in older design codes. On the other hand, modern design codes implement the latest knowledge in the form of performance-based earthquake engineering. Because of this, the level of seismic safety provided by existing RC structures is in some way...

Cross-laminated timber has recently gained great popularity in earthquake-prone areas for construction of residential, administrative, and other types of buildings. At the Laboratory of the Institute of Earthquake Engineering and Engineering Seismology in Skopje, comparative full-scale shaking-table tests of cross-laminated timber panel systems hav...

This paper presents the influence of boundary conditions in numerical simulation of soilstructure interaction problems. It discusses aspects related to a seismic load influencing a soil medium and a frame structure resting on the soil. The soil conditions are represented by 30 m soft, medium, and dense soil deposits with four layers resting on bedr...

This paper deals with successful development of application for signal processing and enhanced frequency domain decomposition analysis EFDD. The benefit of this application is the ability to improve the methodology and to implement some additional parameters for obtaining a more reliable result. The validation of the methodology and implemented alg...

Structural vibration testing and analysis contributes to progress in many industries, including aerospace, auto-making, manufacturing, wood and paper production, power generation, defense, consumer electronics, telecommunications and transportation. The most common application is identification and suppression of unwanted vibration to improve produ...

This research studies an improved performance based assessment method of steel moment resisting frames (MRFs) through alternative modelling of the structure subjected to realistic earthquake loading. The improvement is evaluated through a comparison of two different modelling approaches for design and assessment of the MRFs. The initial approach fo...

This paper presents the theoretical development of a practical numerical method for analysis of complex dam-reservoir interaction problems. The proposed approach takes advantage of the combination of boundary and finite element methods (BEM-FEM) for an independent analysis of two physically distinct dam structure and reservoir-foundation domains. I...

The Response Spectrum Analysis of the structures is based on the allowable ductility considered for that structure. In the case of multi-degree-of-freedom buildings, the required ductility cannot be the same with the allowable ductility; furthermore, the required ductility values are different for different storey. In the case of first soft/weak st...

A development of the ‘first-order storey pseudo-stiffness-based damage index’ of high-rise buildings is presented in this article. The proposed damage index is based on identification of an input set of one modal eigenpair, consisting of one modal frequency and the corresponding mode shape, overcoming the need and the difficulties of identifying mu...

In numerical simulation of soil media, the problem of wave propagation is of a great importance. Proposed in this paper is a new formulation of infinite elements which can be used in numerical simulation of wave propagation problems in infinite domains. In numerical simulation of wave propagation, the finite elements are used to model the near fiel...

At IZIIS, within the framework of the SERIES project, two types of wireless sensors have been developed. The first one, the MIMRACS (Micro Integrated Measuring Recording and Communication System) sensor, presents an intelligent self-controlled high integrated GPS/GPRS/WEB based micro processing digital 3D measurement device, with the possibility of...

Testing of structures to understand their behavior under seismic conditions can provide an important source of information for safe and economical design and for dynamic properties of the structure. The need for testing the behavior of full scale structures under dynamic loads stems from the fact that the analytical calculations cannot account for...

To assure and maintain sustainable development of the Emirate of Abu Dhabi, UAE, in general, of Abu Dhabi Municipality and Abu Dhabi City in particular, and disaster free living environment for its citizens, the Abu Dhabi Municipality Town Planning Department initiated project "Assessment of Seismic Hazard and Risk in Abu Dhabi-ADSHRA". During the...

Recently, at the Institute of Earthquake Engineering and Engineering Seismology IZIIS Skopje, experimental shaking-table tests of various upgrade systems applied on existing two-storey RC structures have been performed. The idea of these tests was to investigate comparatively the influence of each different innovative upgrade system on the integral...

The problem of earthquake protection of historic structures and monuments is radically different from that of other structures, due to the priority given to the preservation of the aesthetic, architectonic and historic value, instead of keeping the structure operational. In their effort to protect these structures with the least intervention and th...

Rubber bearings are among the most frequently applied devices in seismic isolation. Although the behavior of rubber bearings under strong earthquakes is nonlinear, it is often interpreted through the bilinear constitutive law. The investigations presented in this paper represent a successful attempt to simulate nonlinear force-displacement relation...

Seismic stations have been installed on Viña Del Mar building in Chile to provide continuous real-time accelerometer data from this structure. This dataset provides an opportunity to observe and better understand the variation of the dynamic properties of building systems, i.e., natural frequencies. The installed accelerometers allow real time reco...

Rubber bearings are among the most frequently applied elements (devices) for base isolation of structures. Since they are scarcely applied in Macedonia and the Balkan, Institute for Earthquake Engineering and Engineering Seismology (IZIIS) along with local companies carried out ample investigations aimed at development of a technology of production...

Pipeline systems are integral parts of thermal power plants (TPP). They are of a great importance for the proper functioning of power plant systems. During normal functioning of TPP-s, pipeline systems are repeatedly subjected to cyclic harmonic loading, which results in fatigue of material and links. To increase the lifetime and stability of pipel...

Health monitoring of civil structures (HMS) is a new discipline, which contributes to successful and on time detection of damages to structures. This book is a collection of chapters on different topics written by leading scientists in the field. It is primarily focused on the latest achievements in monitoring the earthquake effect upon the health...

Realistic simulation of the nonlinear behaviour of structures subjected to static and dynamic loading has nowdays become one of the most important task in earthquake engineering. However, this simulation mostly depends on the material constitutive relationships adopted in the analytical models. On the other hand, the adopted constitutive models dep...

The objective of this study was to present an advanced methodology for assessing seismic slope stability by taking into account the uncertainties related to the main input parameters. The methodology was applied on a real landslide in order to show the advantages of using the proposed procedure and establish the baseline trends of dynamic response...

Traditionally, most historic buildings represent pre‐21th century masonry structures. It is due to the extensive presence of such masonry structures that their behaviour under earthquakes will be analysed in this paper. First, this paper will outline the traditional methods and materials used in the construction of historic masonry structures. Seco...

The ALSC base isolation system was investigated by testing a church model to the scale 1/3.5 on the two-component shaking table at the IZIIS’ Laboratory, Skopje, Macedonia. The investigation was performed within the frames of the European FP6 project PROHITECH, related to seismic protection of historical buildings by innovative and reversible mixed...

The investigations and the results discussed in this chapter are related to development, production and implementation of low cost rubber isolators. In addition to production of isolators, one of the main objectives of the project was replacement of the old bearings of the Pestalozzi school building with new ones. The initial dimensions of the prot...

The seismic stability of the facade brick-masonry walls of the machinery building of the Beauharnois powerhouse near Montreal, Quebec, Canada were investigated numerically by use of non-linear models and applying experimental methods on site and on the IZIIS’ seismic shake-table. The dynamic properties of the machinery building were obtained by amb...

Preface 1. Seismic Engineering of Monuments Part I Engineering Seismology 2. Microzonation for Earthquake Scenarios 3. Analysis of Regional Ground Motion Variations for Engineering Application Part II Geotechnical Earthquake Engineering 4. Non Linear Soil Structure Interaction: Impact on the Seismic Response of Structures 5. From Non-invasive Site...

A GF+7 storey, orthogonally almost symmetric, shear wall residential tower building has been studied in all details in order to clarify the influence of lead-rubber bearings (LRB) seismic isolation upon its seismic performance. The ambient vibration measurements of the building have been performed by 6 GPS synchronized MICROMED's TROMINO seismomete...

Definition of seismic input for base isolated structures according to UBC-97 and Eurocode 8. Case studies are: -Seismic input for base isolated structure " Pestaloci " scool in Skopje, according UBC-97. -Seismic input for base isolated bridges, according Eurocode 8.

Definition of seismic input for base isolated structures according to UBC-97, and base isolated bridges according to Eurocode 8.

Within the NATO Project SfP977231, three 1/3 scale models (2 story R/C frame specimens) of a 4 story R/C frame building prototype have been designed, constructed and tested on the shaking-table at the IZIIS Laboratory, Skopje, Macedonia. The main goal was to verify the validity and applicability of different seismic retrofitting techniques under th...

This paper presents experimental dynamic shaking table tests on 1/3-scale specimens of RC frame structures with infill walls under real earthquake excitations, with the aim of verifying the validity and applicability of the proposed retrofitting technique. Taking into account the similitude requirements, the artificial mass simulation has been appl...

Ample investigations for re-evaluation of seismic stability of existing earth dams in R. Macedonija have been carried out. The methodology used for that purpose involved: re-evaluation of seismic hazard, dynamic analysis of dams exposed to seismic effects and probabilistic estimation of their seismic safety. Seismic hazard analyses have been perfor...

The paper presents the results referring to the nonlinear analytical prediction of the behavior of a specimen to be tested at IZIIS (a 3D reinforced concrete frame-structure with infill walls) within the scope of the NATO-Science for Peace project SfP97723l “Seismic Assessment and Rehabilitation of Existing Buildings”. The push-over capacity analys...

This study is a part of the research program that is being carried out within the NATO Science for Peace Project SfP977231 “Seismic Assessment and Rehabilitation of Existing Buildings” Within the framework of the research, a new retrofitting method is being experimentally investigated. The dynamical behavior of brick infilled reinforced concrete fr...

A small-scale model of an existing cable-stayed bridge has been designed and built. Hammer, sinusoidal and random signal tests have been performed to determine the dynamic characteristics of the model. An attempt has been made to evaluate the real effect of the vibration of stays upon system damping. Initial measurements have been performed for a m...

A small-scale dynamic model with artificial mass simulation of the Jindo bridge has been designed and built. Hammer, sinusoidal and random signal tests have been used to determine the dynamic characteristics and damping of the model. A comparison of the test results with those obtained from the mathematical model of the prototype has been made to v...

The analytical and experimental seismic response analysis of 7 storey reinforced concrete shear type building structure isolated by friction pendulum system (FPS) are presented herein. The superstructure is idealized as a linear shear type building. Nonlinearity is located in the base in the bearings for base isolation. Real earthquake records with...