Seismic design analysis of the country masonry school buildings in the meizoseismal area

2011 ◽  
Vol 10 (3) ◽  
pp. 359-367 ◽  
Author(s):  
Yuan Feng ◽  
Dan Yi ◽  
Qiong Bi
Keyword(s):  
Seismic Design ◽  
Design Analysis ◽  
School Buildings ◽  
Meizoseismal Area

Appropriate Damping on Seismic Design Analysis for Inelastic Response Assessment of Piping

2018 ◽  
Author(s):  
Tomoyoshi Watakabe ◽  
Masaki Morishita
Keyword(s):  
Seismic Design ◽  
Design Method ◽  
Response Spectrum ◽  
Response Assessment ◽  
Design Analysis ◽  
Stress Factors ◽  
Design Rule ◽  
Inelastic Analysis ◽  
Current Design ◽  
Seismic Design Method

The current seismic design rule on piping assumes elastic analysis without the effect of response reduction due to plasticity, although some degree of plasticity is allowed in its allowable limits. Damping for the seismic design analysis is conservatively determined depending on the number of supports and thermal insulation conditions. These conservative assumptions lead to large amount of design margin. Based on such recognition, to provide a more rational seismic design method, a new Code Case for seismic design of piping is now under development in the framework of JSME Nuclear Codes and Standards as an alternative rule to the current design rule. The Code Case provides detailed inelastic analysis with using shell or solid FEA models as a more rational method. Simplified analysis with an additional damping taking the response reduction due to plasticity into account is now under consideration to incorporate the convenience in design. In this study, a series of analysis was made to see the adequacy of the simplified inelastic analysis. Design margins contained in the current design analysis method composed of response spectrum analysis and stress factors was quantitatively assessed in the view point of additional damping.

Combination of modal responses in linear spectral method: comparison of different formulae for correlation coefficients

2021 ◽  
pp. 32-42
Author(s):  
Alexander G. Tyapin
Keyword(s):  
Spectral Method ◽  
Static Analysis ◽  
Seismic Design ◽  
Method Comparison ◽  
Correlation Coefficients ◽  
Design Analysis ◽  
Common Method ◽  
The Common ◽  
The One ◽  
Mode Response

Linear-spectral method (LSM) is still the common method for the seismic design analysis. "One-component one-mode" responses, obtained by static analysis in the conventional variant of LSM, are combined twice: first for different modes but for each single excitation component separately, then for the different excitation components. In the alternative LSM variant presented in the Russian code SP 14.13330, first one chooses the "most dangerous" direction of the one-component excitation for each mode; then calculates the "one-mode" response for this excitation, and finally these responses are combined. In both cases the combination is performed using the complete quadratic combination (CQC) rule. Different documents suggest different formulae for the correlation coefficients. In the paper different formulae are compared to each other. The goal is to limit the number of calculated coefficients and decrease the amount of calculations.

Investigation on Seismic Structural Damages in Anchang County in Wenchuan Earthquake

2013 ◽  
Vol 671-674 ◽  
pp. 1351-1355
Author(s):  
Wei Li ◽  
Shan You Li ◽  
Zhen Zhao
Keyword(s):  
Wenchuan Earthquake ◽  
Seismic Design ◽  
Type A ◽  
Seismic Damage ◽  
Average Level ◽  
School Buildings ◽  
Type B ◽  
Type C ◽  
Damage Investigation

The seismic damage investigation on 488 buildings in Anchang County during Wenchuan earthquake was performed and the investigation data were analyzed, especially for the school buildings. 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 Type-A buildings are most severe, those of the Type-B buildings are second while those of the Type-C buildings are the slightest. Moreover, the damages of Type-B and Type-C school buildings are a little higher than the average level of Type-B and C buildings in Anchang County.

Discussion on the Seismic Design Analysis Method of Masonry Building

2010 ◽  
Vol 163-167 ◽  
pp. 3952-3957
Author(s):  
Xiao Song Ren ◽  
Yu Fei Tao
Keyword(s):  
Shear Strength ◽  
Seismic Performance ◽  
Seismic Design ◽  
Design Analysis ◽  
Masonry Building ◽  
Analysis Method ◽  
Seismic Capacity ◽  
Major Earthquake ◽  
Moderate Earthquake ◽  
Seismic Design Code

The main seismic objective in China is defined as “no failure under minor earthquake, repairable damage under moderate earthquake and no collapse under major earthquake”. Both strength and deformation are important to evaluate the seismic performance. For masonry building, only the shear strength check under minor earthquake is stipulated in the current Chinese seismic design code. Due to the poor ductility of masonry building, the seismic design analysis method may not guarantee the collapse-resistant capacity under major earthquake. For the achievement of the seismic objective, the demand of ductility is discussed. A typical severely damaged masonry building by the 5.12 Wenchuan Earthquake of 2008 is presented for the analysis of the through X-shape crack on the load-bearing wall. In order to enhance the collapse-resistant capacity, the authors suggest more shear strength margin to take the influence of structural ductility into consideration. The feasible way can be easily realized as a target to raise the limitation for the shear strength check parameter under minor earthquake and to keep uniform seismic capacity in two directions. The investigated building is also illustrated here as an example to process the shear strength check for better seismic performance by the authors’ suggestion.

Damage Analysis of Mianzhu School Buildings in Wenchuan Earthquake

2010 ◽  
Vol 163-167 ◽  
pp. 3359-3363
Author(s):  
Xing Kui Li
Keyword(s):  
Quality Management ◽  
Wenchuan Earthquake ◽  
Seismic Design ◽  
Building Damage ◽  
School Buildings ◽  
Damage Analysis ◽  
Project Quality ◽  
The Wenchuan Earthquake ◽  
Collapsed Buildings

Introduced after the Wenchuan earthquake, the situation of teaching buildings collapsed, buildings destroyed by the actual picture of the location and characteristics of some typical building damage, building damage arising described several major reasons put forward the views of housing and construction reinforcement, stress the seismic design and the importance of project quality management.

Application of Energy Dissipation Technology to C-category Frame Structure of School Buildings for Seismic Retrofit of Increasing Precautionary Intensity

2010 ◽  
Vol 163-167 ◽  
pp. 3480-3487
Author(s):  
Da Gen Weng ◽  
Chao Zhang ◽  
Xi Lin Lu
Keyword(s):  
Energy Dissipation ◽  
Secondary School ◽  
Seismic Design ◽  
Seismic Retrofit ◽  
School Facilities ◽  
Frame Structure ◽  
Earthquake Resistance ◽  
School Buildings ◽  
Primary And Secondary School

In the Ms8.0 Wenchuan earthquake on 12th May 2008, a large number of primary and secondary school buildings were seriously damaged. Therefore, considerable attentions have been paid to earthquake resistance capacity of school facilities and some relevant national codes in China have been updated after earthquake. Recently, many approaches to seismic retrofit of school buildings have been proposed and applied. The focus of this paper is on application of energy dissipation technology to C-category frame structure of school buildings retrofitting, with the objective of increasing one grade of precautionary intensity, while the C-category buildings are designed in conformity with China’s code for seismic design of buildings (GB 50011-2001). Since the seismic precautionary classification of school buildings has been changed from standard precautionary category to major precautionary category, the structural ductility requirements are stricter with the increase of seismic precautionary intensity. Thus, this paper presents the retrofitting difficulties in C-category frame structure of school buildings for the restriction of ductility requirements, and also explores how to apply energy dissipation technology to seismic retrofit of such buildings for achieving expected retrofitting objective and reducing heavy strengthening tasks. In the end, a retrofitting example of C-category frame structure of school building is cited to demonstrate the feasibility of energy-dissipating retrofit method. The analysis results indicate that energy dissipation technology can be well applied to C-category frame structure of school buildings retrofitting for increasing one grade of precautionary intensity.

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