Determination of Time Period of Vibration Effect on Seismic Performance of Building

2013 ◽  
Vol 330 ◽  
pp. 878-883 ◽  
Author(s):  
Salimi Firoozabad Ehsan ◽  
K. Rama Mohan Rao ◽  
Bagheri Bahador
Keyword(s):  
Seismic Performance ◽  
Ground Motions ◽  
Building Code ◽  
Empirical Formulas ◽  
Seismic Code ◽  
Vibration Effect ◽  
Earthquake Resistant Design ◽  
Time Period ◽  
Earthquake Resistant

Most seismic codes specify empirical formulas to obtain the fundamental period of buildings. The equations specified in present IS codes, are according to the available data on the time period of buildings measured from their recorded accelerograms. Shear-wall dominant reinforced concrete buildings, constructed, using codes specification are commonly built in different countries, facing a substantial seismic risk, in spite of their high resistance against ground motions. Current seismic code provisions including the Uniform Building Code (International Conference of Building Officials, Whittier, CA, 1997) and the Indian Seismic Code (Criteria for earthquake resistant design of buildings, fifth revision, 2002) are considered to evaluate the effect of time period on seismic behavior of building.In this study, time period obtained by code formulas are compared with those obtained by modal analysis in SAP2000. Also the top story displacement (as an adequate parameter of determination the seismic performance of building) correspond to the values of mentioned time period are estimated using uniform building code and software respectively. It is observed that current empirical equation for calculating the time period of RCC buildings is rather inaccurate. Also it is shown that the time period has very effective influence on seismic performance of building.

scholarly journals The development of seismic zones and the evaluation of lateral loadings for earthquake resistant design of buildings in Papua New Guinea

1984 ◽  
Vol 17 (4) ◽  
pp. 292-296
Author(s):  
Kevin McCue
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Building Code ◽  
Seismic Zoning ◽  
Seismic Zones ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant

A recently published seismic zoning map of Papua New Guinea does not correlate particularly well with either presentday seismicity or tectonic models of the region. Several reasons are given and a modified version of the map is presented for discussion and as a replacement in the Building Code.

scholarly journals ASSESSMENT OF KNOWLEDGE AND AWARENESS REGARDING MRT OF NBC; A CASE OF TILOTTAMA MUNICIPALITY, NEPAL

2020 ◽  
Vol 8 (7) ◽  
pp. 50-66
Author(s):  
Sandeep Regmi ◽  
Anjay Mishra
Keyword(s):  
Sampling Method ◽  
Total Population ◽  
Tracking System ◽  
Building Code ◽  
Construction Process ◽  
Building Permits ◽  
Technical Requirements ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Private Housing

The study was carried out to analyze the compliance status of NBC and Byelaws in private housing construction of Tilottama Municipality. The permitted building samples with all necessary documents is taken for research purpose to trace the compliance status of National Building Code and Byelaws in construction of private housing. Field verification and review of approved drawings and building permits of 51 numbers of households from the total population of 323are selected by purposive sampling method to check the compliance status of NBC and Byelaws provisions. The samples are taken from both ProfessionallyEngineeredBuildingsandMandatoryruleofthumb-(NBC205) buildings constructed in the Tilottama Municipality. From the study, it is found that after the earthquake concerned stakeholders possess good knowledge of earthquake and its consequences. Knowledge regarding the earthquake resistant design and construction process is found fairly adequate. The perspective of concerned stakeholders towards building code and byelaws are positive. Out of 51 households surveyed, only 7 of the buildings have not complied with all the technical requirements of NBC whereas the building byelaws provisions are found to be effectively implemented by 44 buildings. The adopted process and existing mechanism for the implementation of building code and byelaws by the municipality is not effective as the tracking system of building permit process is ineffective.

scholarly journals Preliminary Amplification Studies of Some Sites using Different Earthquake Motions

2020 ◽  
Vol 6 (10) ◽  
pp. 1906-1921
Author(s):  
Manish Bhutani ◽  
Sanjeev Naval
Keyword(s):  
Ground Motions ◽  
Ground Surface ◽  
Earthquake Hazard ◽  
Response Analysis ◽  
Seismic Zone ◽  
Ground Response ◽  
Ground Response Analysis ◽  
Ground Acceleration ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant

Stability of infrastructure during earthquakes demands ground response analysis to be carried out for a particular region as the ground surface may suffer from amplified Peak Ground Acceleration (PGA) as compared to bedrock PGA causing instability. Many studies have been carried out the world over using different techniques but very few studies have been carried out for the northern part of India, Punjab situated at latitude of 31.326° N and longitude of 75.576° E, which is highly seismic and lies in seismic zone IV as per IS:1893-2016. In this paper 1-D equivalent non-linear ground response analysis has been conducted for sixteen sites of Jalandhar region, Punjab (India) by using five earthquake motions. Input ground motions are selected from the worldwide-recorded database based on the seismicity of the region. Based on the average SPT-N values, all the sites have been classified as per the guidelines of National Earthquake Hazard Reduction program (NEHRP). Shear modulus (G) was calculated using correlation between G and SPT–N Value. The ground surface PGA varies from 0.128 to 0.292 g for the sites of Jalandhar region with Amplification Factor values varying from 1.08 to 2.01. Hence the present study will be useful to the structural designers as an input towards suitable earthquake resistant design of structures for similar sites.

Evaluation of Damage Potential of Ground Motions during Great Earthquakes

2003 ◽  
Vol 19 (3) ◽  
pp. 713-730 ◽  
Author(s):  
Y. Sunasaka ◽  
K. Toki ◽  
A. S. Kiremidjian
Keyword(s):  
Ground Motions ◽  
Damage Index ◽  
Geological Structure ◽  
Large Area ◽  
Damage Potential ◽  
Seismic Safety ◽  
Great Earthquakes ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Index Value

In order to select appropriate input ground motions for earthquake-resistant design or estimation of seismic safety of structures, their characteristics should be identified. In this paper, damage potential is defined as a spectrum of strength demand required to maintain a damage index less than or equal to a tolerable damage index value. The damage index proposed by Park and Ang (1985) and a bilinear model are used to calculate the strength demand spectrum. The damage index describes the state of the concrete structure from slight damage to severe damage or collapse. Studies of the damage potential of ground motions during the recent great earthquakes, including the 1995 Hyogoken-Nanbu earthquake in Japan and the 1999 Chi-Chi earthquake in Taiwan, show that damage potential may be greatly affected by the location of the fault, the geological structure of the site, and the fault rupture mechanism. Furthermore, an estimation of damage potential of ground motions over a large area, Kawasaki City in Japan, is described.

Study on the Anti-Seismic Performance of New Swing Structure System Based on PUSHOVER

2014 ◽  
Vol 580-583 ◽  
pp. 1653-1657
Author(s):  
Di Liu
Keyword(s):  
Seismic Performance ◽  
Frame Structure ◽  
Deformation Model ◽  
Structural System ◽  
Current Frame ◽  
Structure System ◽  
Rigid Frame ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Existing Structure

Swing structure is added to the current frame structure for forming the new swing structure system. In this paper, by taking the existing structure as an example, the anti-seismic performance of the new swing system is analyzed with pushover method and the current earthquake resistant design code, and influence of swing rigid frame with different stiffness ratios on the anti-seismic performance of the new structural system is discussed. According to the results, by setting swing rigid frame with different stiffness ratios, it can enhance the bearing capacity and ductility of the structural system remarkably, coordinate the deformation model of the structural system, give full play to the energy-dissipating capacity of the structure, and improve the anti-seismic performance of the structure.

scholarly journals Modeling Population Spatial-Temporal Distribution Using Taxis Origin and Destination Data

2021 ◽  
Vol 13 (7) ◽  
pp. 3727
Author(s):  
Fatema Rahimi ◽  
Abolghasem Sadeghi-Niaraki ◽  
Mostafa Ghodousi ◽  
Soo-Mi Choi
Keyword(s):  
Regression Analysis ◽  
Mean Squared Error ◽  
Population Distribution ◽  
Temporal Distribution ◽  
Coefficient Of Determination ◽  
Temporal Modeling ◽  
Location Data ◽  
Time Period ◽  
Proposed Model

During dangerous circumstances, knowledge about population distribution is essential for urban infrastructure architecture, policy-making, and urban planning with the best Spatial-temporal resolution. The spatial-temporal modeling of the population distribution of the case study was investigated in the present study. In this regard, the number of generated trips and absorbed trips using the taxis pick-up and drop-off location data was calculated first, and the census population was then allocated to each neighborhood. Finally, the Spatial-temporal distribution of the population was calculated using the developed model. In order to evaluate the model, a regression analysis between the census population and the predicted population for the time period between 21:00 to 23:00 was used. Based on the calculation of the number of generated and the absorbed trips, it showed a different spatial distribution for different hours in one day. The spatial pattern of the population distribution during the day was different from the population distribution during the night. The coefficient of determination of the regression analysis for the model (R2) was 0.9998, and the mean squared error was 10.78. The regression analysis showed that the model works well for the nighttime population at the neighborhood level, so the proposed model will be suitable for the day time population.

scholarly journals FUNDAMENTAL STUDY ON EARTHQUAKE RESISTANT DESIGN OF FILL-TYPE DAMS

1983 ◽  
Vol 1983 (339) ◽  
pp. 127-136 ◽  
Author(s):  
Yoshio OHNE ◽  
Hidehiro TATEBE ◽  
Kunitomo NARITA ◽  
Tetsuo OKUMURA
Keyword(s):  
Fundamental Study ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant
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