Earthquake resistant structures

About: Earthquake resistant structures is a research topic. Over the lifetime, 1126 publications have been published within this topic receiving 27467 citations.

Enhancement of Ductility of Existing Seismic Steel Moment Connections

Abstract: The fracture of beam-to-column connections of steel buildings in the Northridge and Kobe earthquakes generated concerns about the reliability of current design and construction technology for steel connections. The same type of fracturing may occur at similar beam-to-column connections of steel buildings in other seismically active areas. A simple method is proposed here to enhance the ductility of beam-to-column connections of existing buildings. By trimming the bottom flange of the beam slightly, the ductility of the connection can be greatly improved. Experimental studies of the newly designed connections under cyclic load show that the ultimate strengths are almost unaltered; however, the plastic rotational capacity can be increased significantly. When adopting the proposed method, the only work needed is to trim part of the bottom flange plate, and this can be done without removing the floor slab. The proposed connection method can be easily implemented to enhance the ductility of beam-to-column conn...

Analysis of Flanged Shear Wall Using Ansys Concrete Model

Abstract: The frequent occurrence of the major earthquakes in the Indian subcontinent, and construction of tall buildings, especially over the last two decades demands for the construction of earthquake resistant buildings. Many of the tall buildings had collapsed in recent earthquakes and the reasons attributed were poor design and construction practices. The objective of this work is to discuss the possibilities of modeling reinforcement detailing of reinforced concrete models in practical use. To carry out the analytical investigations, the structure is modeled in a Finite Element software ANSYS. The specimens are modeled as (i) discrete model and (ii) smeared model. It reports the results of the analysis of the flanged shear wall with two different types of modeling under cyclic loading. The consequences of small changes in modeling are discussed and it is shown that satisfactory results are obtained from the two models.

Observations from the bhuj earthquake of january 26. 2001

Abstract: The devastating earthquake that struck the Kutch area in Gujarat, India on January 26, 2001, was the most severe natural disaster to afflict India since her independence in 1947. The devastation was major in terms of lives lost, injuries suffered, people rendered homeless, as well as economic impacts. This report is based on first hand observations of reconnaissance team that visited the site in February 2001. Additional information was gathered from several sources, including other visiting teams, news reports and technical literature. The paper touches upon seismological/geotechnical aspects of the earthquake and discusses the performance of engineered buildings. Precast concrete construction, including non-building uses of precast concrete, is discussed. In concluding the paper, the building code situation in India is briefly commented upon.