Seismic performance evaluation of setback buildings using nonlinear static and dynamic methods
Shibajee Sutar1, Lipika Halder2* Graduate Student, Department of Civil Engineering, National Institute of Technology Agartala, India, 799046 shibajeesutar@gmail.com 2*Assistant Professor, Department of Civil Engineering, National Institute of Technology Agartala, India, 799046 erlhalder@yahoo.co.in Abstract: Three ten-storey reinforced concrete framed buildings comprising of one regular in elevation and two setbacks at different level are considered in this study to address the seismic response of vertically irregular buildings. Both inelastic static and dynamic analysis are performed considering three different load patterns and an ensemble of 4
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2. The performance point IO, LS, CP along with median value of nonlinear dynamic analysis at MCE and DBE level are shown in the curve. The trend in the capacity curve is similar for all the buildings. The figure shows that higher stiffness and base shear capacity is yielded from uniform load pattern as compared with triangular and IS code load pattern. However, for any base shear, the displacement due to uniform lateral load pattern is minimum where as IS code load produce maximum displacement. From the figure it could also be inferred that the inelastic time history median results for 0.36 g nearly match the pushover curve obtained from the IS code lateral load pattern in both X and Y …show more content…
4. The figure shows that interstorey drift ratio of all the three building frames resulting from pushover analysis have large values at the bottom and middle stories and smaller value in the upper stories, which indicate the susceptibility of bottom and middle stories. From the three different load patterns, uniform load pattern shows smaller values and IS load pattern shows large values of interstorey drift ratio for all the building. However, interstorey drift ratio at of all the three building satisfies the requirement of LS performance level i.e. limiting drift of 2% as suggested in ATC-40 [8]. It also seems that, comparing the results of inelastic analysis, pushover analysis overestimates the interstorey drift at the bottom level and underestimates at the top. The interstorey ratio obtained from nonlinear time history analysis is less than ATC-40 [8] global limit of IO of
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= IDSS/2 then Schokley’s equation can be written as, I_DSS/2=〖I_DSS (1-V_GS/V_(GS(off)) ) 〗^2 1/2=(1-V_GS/V_(GS(off)) ) ^2 V_GS=0.29V_(GS(off))
The story of Vasquez Rock Natural Park located in Agua Dulce, California began in 1874 when Tiburcio Vasquez a Californian bandit used the rocks to escape being capture by law enforcements. Due to the impact that Tiburcio created in the nearby communities the park was name after him. By 1970 the Los Angeles County Government acquired the rights to the park, but it was not until 1972 that the park was added to the National Registry of Historic Places. At the begging of its creation the park was populated by its first habitants the Tataviam Indians until the intrusion of the Spaniards. The Spaniards ruled the park and ruled the Indians until their death.
The impact of the New Madrid earthquake, although did not result in a lot of fatalities or destruction, left lasting effects on the land and those involved. Many did not know what to do, and it caused terror and fear in those who were ill prepared for the earthquake. It remains the largest earthquake in North America, and will always be remembered in the hearts of the Americans.
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Compare the Burj Khalifa and the Willis (Sears) Towers: key facts, construction, height, technical details. The buildings in our lives are improving very fast and some of these buildings are towers and skyscrapers. Willis Tower and Burj Khalifa are two of the most amazing skyscrapers on the planet. Both have their own characteristics in construction, design and technical features. This essay will compare between Burj Khalifa and Willis Tower in terms of facts, design, construction and technical features.
I had first formal exposure to civil engineering in course “Architecture 1”. This course provided me the fundamental concepts of civil architectural principles such as designing procedure, architectural component’s layouts, functional spaces as well as environmental impacts. To strengthen my concepts I pursued the courses “Strength of Materials”, “Structural Mechanics” which gave me essential knowledge about the external and internal forces occuring in simple structural elements under action of various types of loading as well as fundamental concepts in structural analysis such as modellisation, classification of structures. I gained valuable exposure to the analysis of simple structures submitted to compound loadings by the application of the principle of superposition for such cases as: unsymmetric bending, combined bending and tension or compression, combined bending and torsion, general compound loading. Futhermore, I was fascinated by the force method and displacement method for analysis of statically and kinetically indeterminate structures.
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Dashrath Manjhi (1934– 17 August 2007), also known as Mountain Man, was a poor labourer in Gehlaur village, near Gaya in Bihar, India, who carved a path 110 m long, 9.1 m wide and 7.6 m deep through a hillock using only a hammer and chisel. After 22 years of work, Dashrath shortened travel between the Atri and Wazirganj blocks of Gaya town from 55 km to 15 km. This is just one instance that illustrates the magic power of Civil Engineering in effecting radical social and economic changes. From the very outset, it is precisely this magic power of Civil Engineering that has fascinated me as a scientific discipline.
“Earthquakes are unique challenges for schools. Unlike other natural or man-made hazards, they occur with no warning. Schools cannot be closed in advance, nor evacuated. However, with proper training and planning in advance, everyone in your school community can be prepared to react appropriately during and after an earthquake, with appropriate supplies on hand. This lesson provides an overview of school earthquake preparedness and provides resources for use in incorporating earthquakes into your overall emergency plans (Benthien, n.d.).