Seismic Analysis of Structural Systems Subjected to Fully Non-stationary Artificial Accelerograms

2016 ◽  
pp. 81-107
Author(s):  
Giuseppe Muscolino ◽  
Tiziana Alderucci
Keyword(s):  
Seismic Analysis ◽  
Structural Systems ◽  
Artificial Accelerograms

scholarly journals Backstay Effect of Diaphragm in Tall Building

2020 ◽  
Vol 9 (3) ◽  
pp. 1578-1587
Keyword(s):  
Seismic Analysis ◽  
Response Spectrum ◽  
Retaining Wall ◽  
Tall Building ◽  
Structural Systems ◽  
Base Shear ◽  
High Rise ◽  
Structural Engineer ◽  
Structural Responses ◽  
Seismic Forces

Seismic analysis of structural systems with floor diaphragms has been a requisite in the recent past. The duty of a structural engineer is to be prudent about the behavior of every structural system adopted. Amongst the structural systems that are adopted world over, diaphragm with rigid and semi-rigid floor plate are adopted widely in the analysis. This research focuses on the backstay effect i.e. podium structural interaction with the tower area and consideration of retaining wall as increment of lateral stiffness as specified in latest tall building code IS6700:2016 for low and high rise structures. In the current study models were prepared with low to high rise storeys with rigid and flexible diaphragms considering backstay diaphragm placing tower at center and corner. The models were subjected to seismic forces; response spectrum along with the combination of the gravity loads. The structural responses like natural periods, base shear, displacement and inter storey drift were also studied.

scholarly journals Damage estimation on concrete gravity dams through artificial accelerograms

2018 ◽  
Vol 211 ◽  
pp. 14001
Author(s):  
Enrico Zacchei ◽  
José Luis Molina
Keyword(s):  
Response Curve ◽  
Seismic Analysis ◽  
Response Spectrum ◽  
Damage Index ◽  
Spectral Density Function ◽  
Gravity Dams ◽  
Concrete Gravity Dams ◽  
Power Spectral ◽  
The Time Domain ◽  
Artificial Accelerograms

The aim of this paper is to analyse the damage on gravity dams through artificial earthquakes from two methods. The first procedure defines the performance and the response curve of concrete gravity dams using a harmonic function which establishes linear displacements. The other procedure to obtain the artificial earthquake defines the power spectral density function consistent with the response spectrum. This artificial accelerogram is necessary to quantify the response curve of concrete gravity dams in the time domain. The seismic activity in Spain is not frequent, therefore it is often difficult to select real accelerograms to perform a complete seismic analysis, which makes artificial accelerograms extremely useful. Finally, combining these two procedures, a damage index is determined for assessing the crack’s magnitude. These both efficient and practical procedures are useful to develop further complicated analysis.

scholarly journals Seismic Analysis of Multi-Storey Irregular Building with Different Structural Systems

2020 ◽  
Vol 8 (6) ◽  
pp. 3146-3155
Keyword(s):  
Sequential Analysis ◽  
Seismic Analysis ◽  
Response Spectrum ◽  
Bending Moment ◽  
Structural Systems ◽  
Structural Members ◽  
Structural Behaviour ◽  
Construction Period ◽  
Structural Engineers ◽  
Storey Building

Most of the multi-storey buildings are analysed based on an assumption that the structure is subjected to whole load after modelling the entire structure. But in reality, each storey is subjected to some assumed loads to act during construction period itself as they are constructed in stages as storey wise. Sequential analysis in a structure is ignored by many structural engineers while analysing the structure. Because of this ignorance, variation may occur in structural members in the below storey with respect to above storey as the construction proceeds which leads to incorrect distribution of forces in the member. So, analysis has to be done only by sequential application of loads in each storey for the safety of the structure and cost-effectiveness. In order to study the structural behaviour of a 20-storey building with vertical setback irregularity has been modelled and analysed by response spectrum method considering with and without Construction Sequence Analysis (CSA) using different structural systems in CSI ETABS V16 as per BIS 1893:2016 (Part 1). Finally, results such as axial force, shear force, bending moment are drawn for the structural members and response such as storey displacement, storey shear and storey drift are plotted and compared for each structural system.

scholarly journals COMPARISON OF SEISMIC IMPACTS THROUGH DIFFERENT REGULATIONS

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Mato Uljarević ◽  
Snježana Milovanović ◽  
Radovan Vukomanović
Keyword(s):  
Critical Review ◽  
Structural Damage ◽  
Seismic Analysis ◽  
Structural Systems ◽  
Building Structures ◽  
Basic Principles ◽  
Seismic Force ◽  
Seismic Impacts ◽  
Design And Construction ◽  
Innovative Approaches

This paper presents the basic principles of seismic analysis of structures according to the YU81 andEuropean norm EN 1998-1: 2004. The aim of the paper is a critical review of comparative analysisof seismic impacts in the design of building structures according to these standards. EC8 involvesseveral innovative approaches for the design and construction of structures, such as no structuralfailure, limiting the degree of structural damage, important public use facilities must remain usable.Purpose of this research is to compare the value of seismic force according to YU81 and EC8, forthe same type of structure, depending on the parameters variation, such as different soil categories,different seismicity class, different building structural systems.

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