scholarly journals Structural renovation of residential building in Zagreb after the 22 March 2020 earthquake

2021 ◽  
Vol 73 (06) ◽  
pp. 633-648
Author(s):  
Stjepan Lakusic
Keyword(s):  
Seismic Analysis ◽  
Pushover Analysis ◽  
Residential Building ◽  
Structural Condition ◽  
Static Method ◽  
Seismic Resistance ◽  
Masonry Structures ◽  
Assessment Report ◽  
Nonlinear Static ◽  
Structural Condition Assessment

The phases that must be completed so that a building damaged in earthquake that struck Zagreb on 22 March 2020 can be renovated and strengthened to the required level of seismic resistance are presented in the paper. All phases are therefore presented, starting from the rapid and then detailed inspection, and continuing with preparation of the structural condition assessment report, preparation of renovation design and, finally, ending with realisation of work with expert supervision. A special attention is paid to structural analysis that is conducted using a nonlinear static method based on displacements, the so called pushover analysis, which is considered to be one of the most appropriate methods for seismic analysis of existing masonry structures. All procedures conducted in the scope of this renovation were realised in accordance with legislation that entered into force after the earthquake.

Seismic Vulnerability Assessment of Multistory Timber Braced Frame Traditional Masonry Structures

2012 ◽  
Vol 601 ◽  
pp. 168-172 ◽  
Author(s):  
Naveed Ahmad ◽  
Qaisar Ali ◽  
Muhammad Umar
Keyword(s):  
Dynamic Analysis ◽  
Seismic Vulnerability ◽  
Seismic Analysis ◽  
Pushover Analysis ◽  
Elastic Beam ◽  
Lateral Force ◽  
Experimental Results ◽  
Constitutive Law ◽  
Masonry Structures ◽  
Braced Frame

Research carried out on the seismic investigation of timber braced frame (TBF) masonry structures of traditional construction practice is presented, essential for seismic performance evaluation of such construction type using engineering approaches. An innovative simplified equivalent frame method (EFM) based on macro modelling approach is presented for nonlinear dynamic seismic analysis of TBF masonry structures. The modelling include EFM idealization of wall using stiff elastic beam-column element assigned with moment-rotation (M-θ) nonlinear lumped plasticity hinges. Earlier, the approach i.e. the EFM idealization and M-θ constitutive law, is calibrated with the experimental results obtained through quasi-static cyclic test on full scale walls. The technique is further extended herein for seismic dynamic analysis of multistory structures. Generalization of the technique for modelling walls of various geometry and loading is performed. It included nonlinear static pushover analysis of various case study walls, by means of SAP2000 calibrated earlier with experimental results, for the derivation of lateral force-deformability behavior towards the development of generalized M-θ constitutive law for TBF masonry walls. Three representative structures, from one to three storeys, are analyzed using a suite of ten natural accelerograms and incremental dynamic analysis technique. Structure fragility and resilience functions are derived using a fully probabilistic and dynamic approach. The structures analyzed in the present study represent TBF masonry wall structures, called as Dhajji-Dewari structures, common in Northern areas of Pakistan.

Finite Element Analysis of Seismic Resistance of Masonry Structure in Rural China

2013 ◽  
Vol 827 ◽  
pp. 328-333 ◽  
Author(s):  
Fang Tang
Keyword(s):  
Finite Element ◽  
Rural Areas ◽  
Seismic Analysis ◽  
Rural China ◽  
Failure Criteria ◽  
Seismic Resistance ◽  
Masonry Structures ◽  
Seismic Capacity ◽  
Element Analysis ◽  
Finite Element Software

Buildings with masonry structures in rural areas of China have been the most severely damaged ones in earthquake disasters. This paper has analyzed the failure characteristics of rural masonry buildings in earthquake by summarizing the existing researches of the seismic resistance of masonry structures in rural areas, with its focus on the research of the intensity from VI to X. The constitutive relation model of damage developed by Yang Weizhong is used for the seismic analysis of rural masonry structures in combination with the failure criteria for masonry structures. The finite element software ANSYS is applied for the simulation and the results show that the damage of China's rural masonry structures regularly tends to weaken from the bottom to the top, with the seismic capacity of horizontal walls superior to longitudinal walls. As for vertical walls, due to their weak capacity, damage immediately occurs to them even in medium intensity earthquakes.

scholarly journals Seismic resistance estimation of multi-story steel frames under ductility level earthquake impact by nonlinear static method

2021 ◽  
Vol 263 ◽  
pp. 03011
Author(s):  
Maksim Zubritskiy ◽  
Oleg Ushakov ◽  
Linar Sabitov ◽  
Karina Nabiullina
Keyword(s):  
Characteristic Point ◽  
Steel Frames ◽  
Time History ◽  
Time History Analysis ◽  
Static Method ◽  
Seismic Resistance ◽  
Vibration Modes ◽  
History Analysis ◽  
Point Search ◽  
Nonlinear Static

The article proposes a technique for taking into account the higher vibration modes under seismic resistance estimation of multi-story steel frames by nonlinear static method. The characteristic point search has also been improved. As part of the study, the proposed method was verified by time history analysis. Proposed technique allows one to significantly reduce the calculation time, while excluding the deficit of seismic resistance.

SEISMIC RESISTANCE ESTIMATION OF HIGH-RISING STRUCTURES UNDER DUCTILITY LEVEL EARTHQUAKE BY NONLINEAR STATIC METHOD

2020 ◽  
Vol 89 (3) ◽  
pp. 63-71
Author(s):  
M.A. ZUBRITSKIY ◽  
◽  
O.Y. USHAKOV ◽  
L.S. SABITOV ◽  
◽  
...  
Keyword(s):  
Static Method ◽  
Seismic Resistance ◽  
Nonlinear Static

scholarly journals Account for the contribution of higher vibration modes under seismic resistance estimation of system with elastomeric supports by nonlinear static method

2020 ◽  
Vol 8 (1) ◽  
pp. 59-66
Author(s):  
Maksim Zubrickiy ◽  
Oleg Ushakov ◽  
Linar Sabitov
Keyword(s):  
Static Method ◽  
Seismic Resistance ◽  
Vibration Modes ◽  
Inertial Forces ◽  
Nonlinear Static

The article presents higher vibration modes accounting method to evaluate system seismic resistance by nonlinear static method. As part of the study, in order to verify the proposed method for finding the inertial forces modified system series of dynamic and static calculations was performed. Proposed inertial forces modified system can be applied for seismic resistance estimation of system with elastomeric supports. The results difference varies within 12%.

Seismic Assessment of Monastery of Stoudios (Imrahor Mosque) in Istanbul

2010 ◽  
Vol 133-134 ◽  
pp. 721-726 ◽  
Author(s):  
Bilge Kucukdogan ◽  
Joseph Kubin ◽  
Ali Ihsan Unay
Keyword(s):  
Roman Empire ◽  
Structural Condition ◽  
Condition Assessment ◽  
Seismic Assessment ◽  
Seismic Resistance ◽  
Master Plan ◽  
Historical Buildings ◽  
Structural Condition Assessment ◽  
Partial Destruction

Monastery of Stoudios, dated back to the reign of Eastern Roman Empire, is known to be the oldest surviving –albeit partially- religious building in Istanbul. During sixteen centuries, the building has been exposed to several earthquakes, fires and other minor disasters which have caused considerable damages and partial destruction in some of its sections. As a part of a general master plan for the structural condition assessment of historical buildings and monuments of Istanbul, this study aims to evaluate the seismic resistance of the monastery against future excitations. The expected failures and corresponding preventive/controlling repairs and strengthening measures will also be discussed in the article.

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