Damage Index for Different Structural Systems Subjected to Recorded Earthquake Ground Motions

2018 ◽  
Vol 34 (2) ◽  
pp. 773-793 ◽  
Author(s):  
Mario E. Rodriguez
Keyword(s):  
Ground Motions ◽  
Damage Index ◽  
Earthquake Ground Motion ◽  
Structural Systems ◽  
Damage Analysis ◽  
Damage Potential ◽  
Structural Wall ◽  
Earthquake Ground Motions ◽  
Frame Buildings ◽  
Earthquake Performance

This study quantifies the damage index previously proposed by the writer ( Rodriguez 2015 ) for different structural systems subjected to a set of earthquake ground motions recorded during 12 strong earthquakes in different countries. Damage spectra were also computed using this seismic damage index. This study revisits the previously proposed index and shows that this index can also be interpreted as a ratio of velocities in the structural system responding to the earthquake demand. In addition, this study gives a more general damage analysis interpretation than that of the previous study since damage spectra were computed to assess the damage potential of a given recorded earthquake ground motion for different types of earthquake-resisting systems. The results from the damage analysis are consistent with the findings from previous research: most structural wall buildings show satisfactory earthquake performance, whereas frame buildings frequently show severe damage and collapse.

A Study of Elasto-Plastic Response of Single Degree of Freedom System Using Artificial Ground Motions With Given Time-Frequency Characteristics

2010 ◽  
Author(s):  
Ichiro Ichihashi ◽  
Akira Sone ◽  
Arata Masuda ◽  
Daisuke Iba
Keyword(s):  
Ground Motion ◽  
Response Spectrum ◽  
Ground Motions ◽  
Frequency Characteristics ◽  
Earthquake Ground Motion ◽  
Time Frequency ◽  
Displacement Response ◽  
Earthquake Ground Motions ◽  
Design Response Spectrum ◽  
The Given

In this paper, a number of artificial earthquake ground motions compatible with time-frequency characteristics of recorded actual earthquake ground motion as well as the given target response spectrum are generated using wavelet transform. The maximum non-dimensional displacement of elasto-plastic structures excited these artificial earthquake ground motions are calculated numerically. Displacement response, velocity response and cumulative input energy are shown in the case of the ground motion which cause larger displacement response. Under the given design response spectrum, a selection manner of generated artificial earthquake ground motion which causes lager maximum displacement response of elasto-plastic structure are suggested.

scholarly journals Seismic performance assessment based on damage of structures, Part 1: Theory

2011 ◽  
Vol 9 (1) ◽  
pp. 77-88 ◽  
Author(s):  
Djordje Ladjinovic ◽  
Aleksandra Radujkovic ◽  
Andrija Raseta
Keyword(s):  
Plastic Deformation ◽  
Damage Index ◽  
Earthquake Ground Motion ◽  
Seismic Evaluation ◽  
Seismic Performance Assessment ◽  
Damage Potential ◽  
Earthquake Resistant Structures ◽  
History Of ◽  
Ductility Capacity ◽  
And Function

The paper presents methodology for safety assessment and design of earthquake resistant structures based on application of damage spectra. The damage spectrum can be used for seismic evaluation of vulnerability of structures with given properties and can provide information of damage potential of the recorded ground motions. Damage spectrum represents a variation of a damage index versus structural period for a single-degree-of-freedom system subjected to an earthquake ground motion. The improved damage index, based on plastic deformation and hysteretic energy dissipation, is applied. It depends on maximal plastic deformation, ductility capacity and function including cumulative damage effects. This function, besides the parameter including influence of deterioration, depends on the history of cyclic deformations and on both cyclic and accumulative ductility.

SEISMIC COLLAPSING ANALYSIS OF THREE-STORY WOODEN HOTEL

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Tomiya Takatani ◽  
Hayato Nishikawa
Keyword(s):  
Strong Earthquake ◽  
Surface Soil ◽  
Process Analysis ◽  
Ground Motions ◽  
Soil Layer ◽  
Seismic Intensity ◽  
Earthquake Ground Motion ◽  
Earthquake Ground Motions ◽  
Old Japanese ◽  
Upper Level

A 3-D collapsing-process analysis of an old Japanese-style 3-story wooden hotel under strong earthquake ground motions was carried out with three seismic intensity levels to investigate its seismic performance. Three earthquake ground motions were evaluated from three ground boring data around this wooden hotel, using the non-linear amplification characteristics of surface soil layer above the engineering base rock. As a result, this wooden hotel collapsed against a strong earthquake ground motion with JMA seismic intensity of a “6 upper” level.

Development of design spectra for long-duration ground motions from Cascadia subduction earthquakes

1998 ◽  
Vol 25 (6) ◽  
pp. 1078-1090 ◽  
Author(s):  
R Tremblay
Keyword(s):  
Subduction Zone ◽  
Failure Modes ◽  
Ground Motions ◽  
Damage Index ◽  
Cascadia Subduction Zone ◽  
Damage Potential ◽  
Design Spectra ◽  
Subduction Earthquakes ◽  
Long Duration ◽  
Short Period

There is now growing evidence that large-magnitude earthquakes have occurred and could occur again along the Cascadia subduction zone located west of Vancouver Island, Bristish Columbia. Numerical simulations indicate that these earthquakes would produce long-duration ground motions and would thus be capable of inducing a large number of reversals of inelastic deformations in engineered structures. Efforts have now been undertaken to account for this damage potential in building codes. In this paper, inelastic design spectra are developed for Cascadia subduction earthquakes for four sites in British Columbia. These spectra are compared with elastic design spectra that have been developed recently for the same sites based on empirical attenuation relationships for Cascadia events. The approach used to develop the inelastic spectra aims at providing the same level of protection against structural failure for both subduction events and crustal or subcrustal earthquakes. Force modification factors are first determined for structures exhibiting various failure modes and ductility levels when subjected to representative crustal and subcrustal earthquake ground motions. Thereafter, design spectra are developed for the same structures to prevent structural collapse under simulated Cascadia subduction ground motions. The study reveals that the elastic spectra do not reflect adequately the damage potential of Cascadia earthquakes. These elastic spectra generally are unconservative for Tofino and Victoria. For Vancouver and Prince George, the elastic spectra overestimate the demand, especially for short-period structures.Key words: collapse, crustal earthquakes, damage index, design spectrum, ductility, duration, ground motion, subduction zone.

scholarly journals Cumulative Damage Evaluation of RC Bridge Piers subjected to Multiple Earthquakes

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Do Hyung Lee ◽  
Byeong Hwa Kim ◽  
Jung Joong Kim ◽  
WooSeok Kim
Keyword(s):  
Reinforced Concrete ◽  
Seismic Analysis ◽  
Ground Motions ◽  
Bridge Piers ◽  
Stiffness Degradation ◽  
Earthquake Ground Motion ◽  
Concrete Bridge ◽  
Bridge Structure ◽  
Reinforced Concrete Bridge ◽  
Earthquake Ground Motions

Successive earthquakes of Kocaeli and Duzce within three months indicated that even the survived lifeline structures such as bridges under the former event may have damage or collapse potential under the latter event due to their possible stiffness degradation. It is thus important that a rigorous seismic analysis of such structures should account for the effect of prior earthquake damage. For this purpose, nonlinear seismic analysis of a reinforced concrete bridge structure has been carried out under both single and multiple earthquake ground motions. Behavior and response evaluation of the bridge piers subjected to such motions have been discussed in terms of using both flexure-axial and flexure-shear-axial interaction models. Analytical results show that the stiffness degradation under multiple earthquake ground motions is more pronounced than that under single earthquake ground motion. In addition, comparison of the response without and with shear demonstrates that shear deformation is of significance. The response with shear exhibits the increase in displacement demand and decrease in lateral force carrying capacity, leading to a decrease in energy dissipation capacity. It is concluded that seismic analysis of reinforced concrete bridge structure should account for the effect of multiple earthquake ground motions to assess the demand on such structure properly.

scholarly journals Deconvolution effect of near-fault earthquake ground motions on stochastic dynamic response of tunnel-soil deposit interaction systems

2012 ◽  
Vol 12 (4) ◽  
pp. 1151-1157 ◽  
Author(s):  
K. Hacıefendioğlu
Keyword(s):  
Dynamic Response ◽  
Ground Motions ◽  
Earthquake Ground Motion ◽  
Rigid Base ◽  
Stochastic Dynamic ◽  
The Finite Element Method ◽  
Near Fault ◽  
Earthquake Ground Motions ◽  
Input Model ◽  
The Mean

Abstract. The deconvolution effect of the near-fault earthquake ground motions on the stochastic dynamic response of tunnel-soil deposit interaction systems are investigated by using the finite element method. Two different earthquake input mechanisms are used to consider the deconvolution effects in the analyses: the standard rigid-base input and the deconvolved-base-rock input model. The Bolu tunnel in Turkey is chosen as a numerical example. As near-fault ground motions, 1999 Kocaeli earthquake ground motion is selected. The interface finite elements are used between tunnel and soil deposit. The mean of maximum values of quasi-static, dynamic and total responses obtained from the two input models are compared with each other.

scholarly journals Proposal of Damage Index Ratio for Low- to Mid-Rise Reinforced Concrete Moment-Resisting Frame with Setback Subjected to Uniaxial Seismic Loading

2021 ◽  
Vol 11 (15) ◽  
pp. 6754
Author(s):  
Taufiq Ilham Maulana ◽  
Badamkhand Enkhtengis ◽  
Taiki Saito
Keyword(s):  
Reinforced Concrete ◽  
Experimental Test ◽  
Structural Damage ◽  
Ground Motions ◽  
Frame Analysis ◽  
Damage Index ◽  
Experimental Tests ◽  
Test Results ◽  
Earthquake Ground Motions ◽  
Index Ratio

A vertical irregularity setback in reinforced concrete (RC) building affects its performance and response especially subjected to earthquake ground motions. It is necessary to understand how the seismic damage is established due to setbacks and avoid damage concentration on the irregularity section. The objective of this study is to propose a formula to estimate the damage distribution along the height of the setback building from a geometric measure of the degree of irregularity. First, previous experimental tests for two types of setback buildings, a towered and a stepped setback frames, were analyzed to verify the accuracy of the frame analysis. The results of the frame analysis considerably matched the experimental test results. Furthermore, to study the relationship between the degree of setback and the distribution of damage, a parametric study was conducted using 35 reinforced concrete setback frames, consisting of models with stepped setback type and towered setback type with different degrees of setback. The inelastic dynamic analyses of all the frames under three earthquake ground motions were conducted. The irregularity indices proposed in literature were adopted to express the degree of setback and the structural damage was expressed by the Park–Ang damage index. Using nonlinear regression analysis, formulas to estimate damage index ratio between two main structure parts (tower and base) from setback indices were proposed. Finally, the proposed formula was applied to the experimental test results to confirm its validity.

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