Seismic Damage Control with Passive Energy Devices: A Case Study

1995 ◽  
Vol 11 (2) ◽  
pp. 217-232 ◽  
Author(s):  
Robert J. McNamara
Keyword(s):  
Damage Control ◽  
Structural Response ◽  
Seismic Damage ◽  
Reinforced Concrete Frame ◽  
Energy Devices ◽  
Concrete Frame ◽  
Supplemental Damping ◽  
Damper Design ◽  
Supplemental Dampers

This paper presents a theoretical case study of the effectiveness of supplemental passive damping devices in reducing structural response during seismic excitation. A six story special moment resistant reinforced concrete frame is studied with and without the aid of supplemental dampers. Response predictions are presented for each case. Preliminary damper design requirements are presented for a new facility implementing the supplemental damping system to reduce seismic damage and improve the post earthquake operational capability of the facility.

scholarly journals NON-LINEAR ANALYSIS OF BUILDING STRUCTURES IN SEISMIC AREAS ACCORDING TO THE EUROPEAN STANDARDS, CASE STUDY

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Mehmed Čaušević ◽  
Saša Mitrović
Keyword(s):  
Damage Control ◽  
Building Structures ◽  
European Standard ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Frame Building ◽  
Non Linear ◽  
European Standards ◽  
Control Application

For the design and construction of buildings in seismic areas the European Standard EN 1998-1:2004 offers two non-linear methods, namely: a non-linear pushover based static method and a nonlineardynamic method. This paper discusses those methods which differ from one another in respectto accuracy, simplicity and transparency. Non-linear static procedures were developed in the worldwith the aim of overcoming the insufficiency and limitations of linear methods, whilst at the sametime maintaining a relatively simple application. All procedures incorporate performance-basedconcepts paying more attention to damage control. Application of the presented procedures isillustrated by means of an example of an eight-story reinforced concrete frame building.

Comparison Analysis of Typical Buildings in North-South Seismic Belt

2014 ◽  
Vol 501-504 ◽  
pp. 1639-1643
Author(s):  
Jie Ping Liu ◽  
Ning Guo ◽  
Ling Xin Zhang
Keyword(s):  
Seismic Damage ◽  
Frame Structure ◽  
Seismic Belt ◽  
Seismic Capacity ◽  
Reinforced Concrete Frame ◽  
Timber Frame ◽  
Concrete Frame ◽  
The North ◽  
Frame Buildings ◽  
Reinforced Concrete Frame Structure

In North-south earthquake belt, half of more than Ms 8.0 great earthquakes were centralized since the history records were existed in our country. In order to study the typical buildings in this seismic belt, the seismic damages of the typical buildings occurred during 22 earthquakes in North-south earthquake belt, whose earthquake magnitude were more than Ms 6.0, were organized and analyzed. The seismic damage and its matrix of kinds of buildings belonging to the North-south earthquake belt in different intensities were obtained. The statistic results were obtained by comparison and analysis. According to the results of analysis, the seismic capacity of kinds of typical buildings in this region was provided: reinforced concrete frame structure showed fine seismic capability in all previous earthquake whose seismic damage was the slightest in the real statistics results; secondly were those of masonry and mortised timber frame buildings; the seismic damage of buildings, which was combined with timber frame and soil, stone, brick walls was the most serious.

Seismic Damage Investigation on Buildings of Qingchuan County in Wenchuan Earthquake

2013 ◽  
Vol 275-277 ◽  
pp. 2803-2806
Author(s):  
Wei Li ◽  
Shan You Li ◽  
Zhen Zhao
Keyword(s):  
Wenchuan Earthquake ◽  
Seismic Design ◽  
Seismic Damage ◽  
Frame Structures ◽  
Reinforced Concrete Frame ◽  
Wood Structures ◽  
Concrete Frame ◽  
Reinforced Concrete Frame Structures ◽  
Bottom Frame ◽  
Damage Investigation

The seismic damage investigation data of 257 buildings in Qingchuan County during Wenchuan earthquake are statistically analyzed. The results indicate that the seismic damages of buildings with seismic design are obviously lower than those of buildings without seismic design, and the damages of the brick-wood structures are most severe, that of the bottom frame structures and masonry structures are second while that of the reinforced concrete frame structures are relatively slight.

Vulnerability Assessment of Existing Low-Rise Reinforced Concrete School Buildings in Low Seismic Region Using Ambient Noise Method

2014 ◽  
Vol 931-932 ◽  
pp. 483-489 ◽  
Author(s):  
Ahmad Fahmy Kamarudin ◽  
Ibrahim Azmi ◽  
Zainah Ibrahim ◽  
Aziman Madun ◽  
Mohd Effendi Daud
Keyword(s):  
Reinforced Concrete ◽  
Vulnerability Assessment ◽  
Ambient Noise ◽  
Natural Frequencies ◽  
Structural Response ◽  
Reinforced Concrete Frame ◽  
Seismic Region ◽  
Concrete Frame ◽  
Adjacent Buildings ◽  
Ambient Noise Method

Ground movements triggered by the Bukit Tinggi earthquakes in 2007 to 2009 are believed to be the possible cause of several structural damages on a secondary school building of SMK Bukit Tinggi, in the state of Pahang, Malaysia. This paper describes the ambient noise study conducted on the damaged building (a 4-storey reinforced concrete frame laboratory building) and the adjacent buildings using tri-axial 1 Hz seismometer sensors. Fourier amplitude spectra (FAS) analysis was applied to determine the buildings natural frequencies for vulnerability assessment of the damaged structure in both longitudinal and transverse axes. Significant multiple peaks of FAS curves used for natural frequencies determination of the buildings show values between 4.18 to 4.34 Hz, 5.04 to 5.23 Hz, 6.07 to 6.54 Hz and 8.17 to 8.81 Hz, indicating the existence of translational and torsional vibration modes acting on the buildings. Differences in dynamic behaviour between the laboratory and the adjacent buildings may be responsible for the structural damages due to the independent structural response and excessive torsional effect during the Bukit Tinggi earthquake tremors.

scholarly journals A Case Study on a Fire-Induced Collapse Accident of a Reinforced Concrete Frame-Supported Masonry Structure

2015 ◽  
Vol 52 (3) ◽  
pp. 707-729 ◽  
Author(s):  
Yi Li ◽  
Xinzheng Lu ◽  
Hong Guan ◽  
Mingjian Ying ◽  
Weiming Yan
Keyword(s):  
Reinforced Concrete ◽  
Masonry Structure ◽  
Reinforced Concrete Frame ◽  
Concrete Frame

scholarly journals Effect of Environmental Conditions on the Modal Response of a 10-Story Reinforced Concrete Tower

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Marco Regni ◽  
Davide Arezzo ◽  
Sandro Carbonari ◽  
Fabrizio Gara ◽  
Daniele Zonta
Keyword(s):  
Reinforced Concrete ◽  
Wind Velocity ◽  
Natural Frequencies ◽  
Structural Response ◽  
Low Noise ◽  
Effect Of Temperature ◽  
Modal Parameters ◽  
Reinforced Concrete Frame ◽  
Torsional Mode ◽  
Concrete Frame

We analyse the effect of temperature and wind velocity on the natural frequencies and modal damping ratios of the Faculty of Engineering Tower at the Università Politecnica delle Marche, a 10-story reinforced concrete frame building, permanently monitored with low-noise accelerometers. The data recorded over the first 5 months of monitoring demonstrate that temperature variations and wind intensity have a clear effect on the first three natural frequencies and the corresponding damping ratios. Temperature is positively correlated to the first and second frequencies, corresponding to shear displacement modes and negatively correlated to the third frequency, corresponding to a torsional mode. All frequencies are positively correlated to wind velocity and changes in damping ratios are inversely correlated to any change in frequency. A mechanical explanation of these phenomena is offered, based on a critical review of literature case studies. These results suggest that using changes in modal parameters for damage detection always requires accurate knowledge of the correlation between modal parameters and environmental quantities (temperature, humidity, and wind velocity), an information which is only available through long-term continuous monitoring of the structural response.

scholarly journals Case Study on Vulnerability Increase for a Reinforced Concrete Frame Structure

2015 ◽  
Vol 11 (3) ◽  
pp. 38-45
Author(s):  
Ioana Olteanu ◽  
Radu Marian Canarache ◽  
Mihai Budescu
Keyword(s):  
Reinforced Concrete ◽  
Fragility Curves ◽  
Response Spectrum ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Capacity Curves ◽  
Performance Point ◽  
Reinforced Concrete Frame Structure

Abstract Seismic vulnerability for a structure represents the susceptibility to be affected by an event with a given intensity. The vulnerability of a structure can be influenced by the design methods or by different problems that may appear during the execution process. This paper shows a case study for the vulnerability increase of a reinforced concrete frame structure in 2 different situations: a) modification produced due to code changes, meaning P100-2006 respectively P100-2013; b) modifications produced the structure taking into account the errors which have occurred during the execution process; For both cases, capacity curves were plotted considering the nonlinear analysis, also called pushover. The numerical simulation was performed in SAP2000 software. These curves were compared with the response spectrum corresponding to the site conditions in order to obtain the performance point. For accurate results, fragility curves were plotted for both considered situations, according to previous research of the authors. The paper emphasizes the importance of each stage during the execution of a structure. More over the differences in the vulnerability index show the importance on the overall behavior of the structure. Solution to increase strength and safety for the structure are also given at the end of the paper

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