DAMAGE EVOLUTION SPECTRA FOR SEISMIC ANALYSIS OF HIGH-RISE BUILDINGS

Seismic response spectra are amongst one of the most important tools for characterizing earthquake ground motions. In design practice, the response spectra are presented without including any load history, hence the nonlinear analysis of structures based solely on conventional earthquake response spectra is theoretically unsound, particularly for long-period or vertically irregular high-rise buildings. In this paper, a concept of seismic damage evolution is introduced and the method of analysis for characterizing the process of seismic damage to structures under earthquakes is presented. Seismic damage evolution spectra for analysis and design of high-rise buildings are then developed as an effective means of describing and simplifying earthquake ground motions. These spectra are shown to be very useful in selecting the ground motion-time history and, particularly, validating the equivalent static-load analysis and design of high-rise buildings under near-fault pulse-like ground motions. Case studies of the seismic inelastic performance of two vertically irregular, tall buildings are presented considering the seismic damage evolution spectra.

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Dynamic Seismic Analysis and Design of R.C.C Multi Purpose Building (G+15) By using E-Tabs

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.j9418.08101021 ◽

2021 ◽

Vol 10 (10) ◽

pp. 84-91

Author(s):

T.G.N.C. Vamsi Krishna ◽

◽

V. Amani ◽

P.S. Sunil Kumar* ◽

CH. Naveen Kumar ◽

...

Keyword(s):

Seismic Analysis ◽

Response Spectrum ◽

Construction Materials ◽

Tall Buildings ◽

Poor Quality ◽

Lateral Loads ◽

Analysis And Design ◽

Building Model ◽

High Rise ◽

Construction Methods

An earthquake is a sudden, rapid shaking of the earth caused by the breaking and shifting of rock beneath the earth’s surface. Earthquakes are among the most powerful events on earth, and their results can be terrifying. In0general for0design of tall0buildings both0wind as well0as earthquake0loads need0to be0considered. Governing0criteria for0carrying out0dynamic analyses0for earthquake0loads are different0from wind0loads. However many tall buildings are not so resistant in lateral loads due to earthquake. Reinforced concrete multi-storied buildings in India were for the first time subjected to a strong ground motion shaking in Bhuj earthquake. It has been concluded that the principal reasons of failure may be attributed to soft stories, floating columns, mass irregularities, poor quality of construction materials faulty construction methods, unstable earthquake response, soil and infrastructure, which were determined to cause damage to the attached structure. High-rise buildings are in high demand due to global urbanization and population growth, and high-rise buildings are likely to suffer the most damage from earthquakes. Since earthquake forces are irregular and unnatural in nature, engineering tools need to be sharpened to analyze the structure in the work of these forces. In this study, to understand the behaviour of structure located in seismic zones III for G+15 Multi-Purpose storey building model is considered for study. Performance of frame is studied through Response Spectrum analysis and comparison is made on shear force, storey drift, storey displacement and storey stiffness.

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SEISMIC ANALYSIS OF DIAGRID STEEL STRUCTURES FOR MULTISTOREY BUILDINGS.

June-2020 - International Journal of Engineering Sciences & Research Technology ◽

10.29121/jesrt.v9.i7.2020.5 ◽

2020 ◽

Vol 9 (7) ◽

pp. 37-44

Keyword(s):

Seismic Analysis ◽

Tall Buildings ◽

Steel Structures ◽

Construction Technology ◽

Structural Members ◽

Lateral Loads ◽

Structural System ◽

Exterior Surface ◽

Analysis And Design ◽

High Rise

Advances in construction technology, materials, structural systems and analytical methods for analysis and design facilitated the growth of high rise buildings. Structural design of high rise buildings is governed by lateral loads due to wind or earthquake. Lateral load resistance of structure is provided by interior structural system or exterior structural system. It is very important that the selected structural system is such that the structural elements are utilized effectively while satisfying design requirements. Recently diagrid structural system is adopted in tall buildings due to its structural efficiency and flexibility in architectural planning. diagrid structure consists of inclined columns on the exterior surface of building. Due to inclined columns lateral loads are resisted by axial action of the diagonal. lateral shear can be carried by the diagonals on the periphery of building. Analysis and design of 30 story diagrid steel building is presented. A regular floor plan of 36 m × 36m size is considered. ETABS software is used for modeling and analysis of structural members. All structural members are designed as per IS 800:2007 considering all load combinations. Earthquake is considered for analysis of the structure. Load distribution in diagrid system is also studied for 36 storey building. Similarly, analysis for the different diagrid pattern is carried out. Comparison of analysis results in terms of time period, top storey displacement and storey drift is presented in this paper.

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Implementing the performance-based seismic design for new reinforced concrete structures: Comparison among ASCE/SEI 41, TBI, and LATBSDC

Earthquake Spectra ◽

10.1177/8755293020981968 ◽

2021 ◽

pp. 875529302098196

Author(s):

Siamak Sattar ◽

Anne Hulsey ◽

Garrett Hagen ◽

Farzad Naeim ◽

Steven McCabe

Keyword(s):

Reinforced Concrete ◽

Los Angeles ◽

Seismic Design ◽

Common Ground ◽

Seismic Analysis ◽

Tall Buildings ◽

The United States ◽

Analysis And Design ◽

Performance Based Seismic Design ◽

New Buildings

Performance-based seismic design (PBSD) has been recognized as a framework for designing new buildings in the United States in recent years. Various guidelines and standards have been developed to codify and document the implementation of PBSD, including “ Seismic Evaluation and Retrofit of Existing Buildings” (ASCE 41-17), the Tall Buildings Initiative’s Guidelines for Performance-Based Seismic Design of Tall Buildings (TBI Guidelines), and the Los Angeles Tall Buildings Structural Design Council’s An Alternative Procedure for Seismic Analysis and Design of Tall Buildings Located in the Los Angeles Region (LATBSDC Procedure). The main goal of these documents is to regularize the implementation of PBSD for practicing engineers. These documents were developed independently with experts from varying backgrounds and organizations and consequently have differences in several degrees from basic intent to the details of the implementation. As the main objective of PBSD is to ensure a specified building performance, these documents would be expected to provide similar recommendations for achieving a given performance objective for new buildings. This article provides a detailed comparison among each document’s implementation of PBSD for reinforced concrete buildings, with the goal of highlighting the differences among these documents and identifying provisions in which the designed building may achieve varied performance depending on the chosen standard/guideline. This comparison can help committees developing these documents to be aware of their differences, investigate the sources of their divergence, and bring these documents closer to common ground in future cycles.

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Response of higherise buildings to ground motion from underground nuclear detonations

Bulletin of the Seismological Society of America ◽

10.1785/bssa0590062343 ◽

1969 ◽

Vol 59 (6) ◽

pp. 2343-2370

Author(s):

John A. Blume

Keyword(s):

Ground Motion ◽

Las Vegas ◽

Spectral Response ◽

Vertical Plane ◽

Time History ◽

Tall Buildings ◽

Response Spectra ◽

Statistical Parameters ◽

Typical Data ◽

Earthquake Design

abstract Typical data obtained thus far in the AEC nuclear test program on the response of highrise Las Vegas buildings to ground motion from distant nuclear events including Boxcar and Benham are presented, together with measured building response to distant earthquakes and to wind gusts. Major variations in response spectra are shown over the city for a specific event, from period band to period band at the same location for different events, and statistical parameters are shown for the randomness of spectral response. The peak response of tall buildings is shown for the top levels in translation and in orbital motion, and in the vertical plane with simultaneous multi-level measurements. The variation of peak modal response is shown with elapsed time, modal combinations are noted, and an example of time-history computed response is compared to measured response. It is shown that highrise Las Vegas buildings respond to ground motion with considerable amplification, that the fundamental modes tend to dominate the peak responses although there are exceptions, that there can be significant modification of loading conditions because of simultaneous motion in the two horizontal axes even though a building is symmetric, and that some building periods vary with amplitude and history of non-damaging prior response while others do not. In general there are indications that code earthquake design criteria are by no means conservative.

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Optimal Design of Hysteretic Damper with Stopper Mechanism for Tall Buildings under Earthquake Ground Motions of Extremely Large Amplitude

Reliability-Based Analysis and Design of Structures and Infrastructure ◽

10.1201/9781003194613-25 ◽

2021 ◽

pp. 381-394

Author(s):

Shoki Hashizume ◽

Izuru Takewaki

Keyword(s):

Optimal Design ◽

Large Amplitude ◽

Ground Motions ◽

Tall Buildings ◽

Earthquake Ground Motions ◽

Hysteretic Damper

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Seismic Analysis of High Pier Three-Span Continuous Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.744-746.890 ◽

2015 ◽

Vol 744-746 ◽

pp. 890-893

Author(s):

Xun Wu ◽

Yong Lan Zhang

Keyword(s):

Seismic Analysis ◽

Linear Time ◽

Time History ◽

Response Spectra ◽

Elastic Response ◽

Modeling And Analysis ◽

Continuous Beam Bridge ◽

Comparison Results ◽

Elastic Response Spectra ◽

Nonlinear Time History

In this paper, SAP2000 and ANSYS software are used to modeling and analysis athree-span continuous beam bridge with high piers case study.By using differentbearing types and combinations to form different options, create two finiteelement models.Analysis dynamic characteristics ,elastic response spectra,linear time history and nonlinear time history .And focus on comparing dynamiccharacteristics of the earthquake response of the two programs .Running outputdata processing and comparison results show that the application of thedifferent parameters of the rational combination of rubber bearing basin bridgearrangement has better seismic performance.

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Earthquake-Induced Pounding of Medium-to-High-Rise Base-Isolated Buildings

Applied Sciences ◽

10.3390/app9214681 ◽

2019 ◽

Vol 9 (21) ◽

pp. 4681

Author(s):

Hosein Naderpour ◽

Payam Danaeifard ◽

Daniel Burkacki ◽

Robert Jankowski

Keyword(s):

Seismic Isolation ◽

General Trend ◽

Ground Motions ◽

Seismic Damage ◽

Large Displacements ◽

Gap Size ◽

Structural Pounding ◽

High Rise ◽

Adjacent Structures ◽

Fixed Base

During earthquakes, out-of-phase vibrations in adjacent buildings with limited distance may cause pounding between them. In recent years, the use of seismic isolation has expanded considerably as an effective approach to reduce seismic damage. However, the isolated building experiences large displacements during earthquakes, and there is a possibility of collisions with adjacent structures. The research on earthquake-induced pounding of base-isolated buildings has been mainly focused on interactions between low structures. In this paper, the influence of structural pounding on the response of medium-to-high-rise base-isolated buildings is investigated under different ground motions. The analysis has been focused on collisions between two insufficiently separated five-story and eight-story base-isolated and fixed base buildings aligned in three different configurations. The results of the study indicate that structural pounding may significantly increase the response of medium-to-high-rise base-isolated buildings during earthquakes. Moreover, substantial dependence of the structural behavior on the gap size between structures has been observed. The general trend shows the reduction in the pounding-involved response with the increase in the gap size value. The results indicate that the increase in the response of the base-isolated building is larger when the height of the structure is bigger. They also show that larger amplifications of peak accelerations of the upper stories can be expected due to collisions. On the other hand, the amplifications of the story shears have not shown any specific trend for different stories of the analyzed base-isolated building.

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Comparison of Scaling Ground Motions Using Arithmetic with Logarithm Values for Spectral Matching Procedure

Shock and Vibration ◽

10.1155/2020/8180612 ◽

2020 ◽

Vol 2020 ◽

pp. 1-14

Author(s):

Rui Zhang ◽

Dong-sheng Wang ◽

Xiao-yu Chen ◽

Hong-nan Li

Keyword(s):

Ground Motions ◽

Time History ◽

Response Spectra ◽

Time History Analysis ◽

Spectral Matching ◽

Moment Resisting Frame ◽

History Analysis ◽

Moment Resisting ◽

Structural Responses ◽

Structural Time

In recent studies, spectral matching is the most commonly proposed method for selecting earthquake records for time-history analysis of structures. However, until now, there have been no serious investigations of the effects of coordinate values on the scaling of ground motions. This paper investigated the influence of using arithmetic and logarithmic values of response spectra in spectral matching procedures (i.e., ASM and LSM methods) on the results of nonlinear structural time-history analysis. Steel moment resisting frame structures of the 3-, 9-, and 20-stories, which represent low-, medium-, and high-rise buildings, respectively, were used as examples. Structural benchmark responses were determined by calculating the arithmetic mean and median of peak interstory drift ratio (PIDR) demands based on the three record sets developed by the American SAC Steel Project. The three record sets represent seismic hazard levels with 50%, 10%, and 2% probabilities exceeded in 50 years, and their average acceleration spectra were also taken as the target spectrum. Moreover, another 40 record components for selection were scaled both by ASM and LSM methods. The seven components whose spectra were best compatible with the target spectra were selected for the structural time-history analysis. The scale factors obtained by the LSM method are nearly larger than that of the ASM method, and their ranking and selection of records are different. The estimation accuracies of structural mean (median) responses by both methods can be controlled within an engineering acceptable range (±20%), but the LSM method may cause larger structural responses than the ASM method. The LSM method has a better capacity for reducing the variability of structural responses than the ASM method, and this advantage is more significant for longer-period structures (e.g., 20-story structure) with more severe nonlinear responses.

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Non-Linear Response of Cable-Mass-Spring System in High-Rise Buildings under Stochastic Seismic Excitation

Materials ◽

10.3390/ma14226858 ◽

2021 ◽

Vol 14 (22) ◽

pp. 6858

Author(s):

Hanna Weber ◽

Stefan Kaczmarczyk ◽

Radosław Iwankiewicz

Keyword(s):

Linear System ◽

Ground Motions ◽

Vertical Direction ◽

Equivalent Linearization ◽

Mass System ◽

High Rise ◽

Earthquake Ground Motions ◽

Cantilever Structure ◽

Non Linear ◽

Non Linear System

In high-rise buildings earthquake ground motions induce bending deformation of the host structure. Large dynamic displacements at the top of the building can be observed which in turn lead to the excitation of the cables/ropes within lift installations. In this paper, the stochastic dynamics of a cable with a spring-damper and a mass system deployed in a tall cantilever structure under earthquake excitation is considered. The non-linear system is developed to describe lateral displacements of a vertical cable with a concentrated mass attached at its lower end. The system is moving slowly in the vertical direction. The horizontal displacements of the main mass are constrained by a spring-viscous damping element. The earthquake ground motions are modelled as a filtered Gaussian white noise stochastic process. The equivalent linearization technique is then used to replace the original non-linear system with a linear one with the coefficients determined by utilising the minimization of the mean-square error between both systems. Mean values, variances and covariances of particular random state variables have been obtained by using the numerical calculation. The received results were compared with the deterministic response of the system to the harmonic process and were verified against results obtained by Monte Carlo simulation.

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