Comparison between seismic vulnerability models and experimental dynamic properties of existing buildings in France

Michel, Clotaire; Guéguen, Philippe; Lestuzzi, Pierino; Bard, Pierre‐Yves

doi:10.1007/s10518-010-9185-7

Cited by 58 publications

(43 citation statements)

References 22 publications

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“…The measured natural frequencies and the corresponding mode shape of a structure are primarily a function of the mass and stiffness characteristics and their distribution in the structure, the boundary conditions of the structure and the connectivity or continuity conditions between the various subcomponents of the structure [8]. Furthermore, empirical relationships exist in codes to estimate elastic fundamental frequency but they miss experimental data to validate them accounting for national feature of building design [14]. Even if the natural frequency extracted from AVT may be larger than the elastic frequency (at yield) generally used in earthquake engineering, ambient vibration recoding may provide large set of data for statistical analysis of periods versus building characteristic relationship [14].…”

Section: Ambient Vibration Resultsmentioning

confidence: 99%

“…Furthermore, empirical relationships exist in codes to estimate elastic fundamental frequency but they miss experimental data to validate them accounting for national feature of building design [14]. Even if the natural frequency extracted from AVT may be larger than the elastic frequency (at yield) generally used in earthquake engineering, ambient vibration recoding may provide large set of data for statistical analysis of periods versus building characteristic relationship [14]. …”

Section: Ambient Vibration Resultsmentioning

confidence: 99%

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Ambient Vibration Test on Reinforced Concrete Bridges

Idris

Boon

Kamarudin

et al. 2016

MATEC Web of Conferences

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Abstract. An investigation was carried out to determine dynamic characteristic of reinforced concrete (RC) bridges by using ambient vibration test (AVT). The ambient vibration sources on bridges may come from traffic, wind, wave motion and seismic events. AVT describes the dynamic characteristics of the bridge and ground by measuring the natural frequencies using highly sensitive seismometer sensor. This test is beneficial due to light weight equipment and smaller number of operator required, cheap and easy to be handled. It is able to give a true picture of the bridge dynamic behavior without any artificial force excitation when vibration data is recorded. A three-span reinforced concrete bridge located in Sri Medan, Batu Pahat, Johor was measured by using microtremor equipment consist of three units of 1 Hz eigenfrequency passive sensors used in this test was performed in normal operating condition without excitation required from any active sources or short period noise perturbations. Ten measurements were conducted on the bridge deck and ten measurements on the ground surface in order to identify the natural frequencies of the bridge. Several peak frequencies were identified from three components of Fourier Amplitude Spectra (FAS) in transverse (NorthSouth), longitudinal (East-West) and vertical (Up-Down) direction as well as squared average Horizontal to Vertical Spectral Ratio (HVSR) of ground response, computed by using Geopsy software. From the result, it was expected the bridge have five vibration modes frequencies in the range of 1.0 Hz and 7.0 Hz with the first two modes in the transverse and longitudinal direction having a frequency 1.0 Hz, the third mode is 2.2 Hz in transverse direction, fourth and fifth mode is 5.8 Hz and 7.0 Hz. For ground natural frequencies are in range 1.0 Hz to 1.3 Hz for North-South direction and 1.0 Hz to 1.6 Hz for East-West direction. Finally the results are compared with several empirical formulas for simple verification.

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Section: Ambient Vibration Resultsmentioning

confidence: 99%

Section: Ambient Vibration Resultsmentioning

confidence: 99%

Ambient Vibration Test on Reinforced Concrete Bridges

Idris

Boon

Kamarudin

et al. 2016

MATEC Web of Conferences

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“…It was after the impact of this earthquake that seismic vulnerability studies became more important in Spain [30,31] and other European areas where buildings have similar structures, e.g., France [32,33] and Italy [34,35].…”

Section: Representative Earthquakementioning

confidence: 99%

Structural Resistance of Reinforced Concrete Buildings in Areas of Moderate Seismicity and Assessment of Strategies for Structural Improvement

2017

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Abstract:Moderate magnitude seismic events have occurred during the last decade in non-seismic areas and have highlighted that many existing buildings do not sufficiently resist these types of events. The objective of this work is to illustrate that most buildings dating from 2002-2010 constructed from wide beams, which were designed to previous earthquake resistance codes, do not offer a satisfactory seismic behaviour, and to identify which structural attributes can best help alleviate this problem. In this work the effect of a real earthquake of medium magnitude (Lorca, 2011) on buildings of three, five and eight stories with unidirectional frames of wide-beam concrete was assessed. The methodology included non-linear static (pushover) analyses and dynamic response simulations with the aim to understand the effect on the seismic performance of changing some of the geometrical and material parameters. Maximum displacements and capacity curves for the top floor of a set of representative buildings were evaluated and compared. In particular, capacity curves obtained from non-linear static (pushover) analysis are compared for different building configurations, as well as the maximum displacements obtained through non-linear dynamic analysis. This paper highlights the seismic vulnerability of buildings constructed between 2002 and 2010 and the results indicate that a higher density of infill walls (walls whose bricks are not part of the main structure) is the feature that most significantly improves the seismic behaviour of the structures analysed. Moreover, counterintuitively, incorporating stronger concrete and reinforcing steel and using alternative column arrangements only have a small positive effect on the seismic behaviour of these types of buildings.

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“…It is due to the fundamental frequency of bridge depending on the span length and the type of bridge construction [7]. Furthermore, empirical relationships exist in codes to estimate elastic fundamental frequency but they miss experimental data to validate them accounting for national feature of building design [8].…”

Section: Iconcees 2015mentioning

confidence: 99%

Identification of Dynamic Characteristics of Bridge Crossing Sungai Simpang Kiri Using Free Vibration Analysis

Yusoff

Sooria²,

Kamarudin

et al. 2016

MATEC Web of Conferences

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Abstract. This paper presents a free vibration analysis (FVA) of a reinforced concrete bridge crossing Sungai Simpang Kiri, located at Batu Pahat. The bridge consists of three simple spans with a total length of 70meter (20 m + 30 m + 20 m). The concrete deck of the bridge is supported by concrete tensioned pre-stressed T-beam. The girders are sitting on two abutments at both ends and two piers as internal supports. The base of the piers is considered as fixed base and the abutments were free to move. The structural dynamic characteristics of the bridge in terms of fundamental frequency and mode shapes were obtained analytically using SAP2000 three-dimensional finite element modeling software. It is very important to evaluate the dynamic characteristics of reinforced concrete bridges that can lead to the detection of stiffness reduction or damage of the structure. From the analysis, the fundamental frequency of the bridge was 1.94 Hz with fundamental mode shape is critical in transverse bending mode.

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Comparison between seismic vulnerability models and experimental dynamic properties of existing buildings in France

Cited by 58 publications

References 22 publications

Ambient Vibration Test on Reinforced Concrete Bridges

Ambient Vibration Test on Reinforced Concrete Bridges

Structural Resistance of Reinforced Concrete Buildings in Areas of Moderate Seismicity and Assessment of Strategies for Structural Improvement

Identification of Dynamic Characteristics of Bridge Crossing Sungai Simpang Kiri Using Free Vibration Analysis

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