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IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints


IASS Symposium 2014

SESSION: Concrete Shell Roofs

Seismic behavior of an earth-formed / earth-covered concrete shell during the 2003 San Simeon, California earthquake

< Table of Contents for Concrete Shell Roofs
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: Concrete Shell Roofs
  • Title: Seismic behavior of an earth-formed / earth-covered concrete shell during the 2003 San Simeon, California earthquake
  • Author(s): Satwant RIHAL, Ali ROUFEGARINEJAD, Mason WALTERS
  • Keywords: Concrete Shells, Seismic behavior and design, Innovative concrete domes, 3-D computer modeling, Code Provisions
Abstract
This paper presents the seismic response and behavior of an innovative earth-formed / earth-covered reinforced concrete shell located in a seismic zone. This paper presents the process of developing a realistic seismic analysis SAP 2000 model, of this as-built reinforced concrete shell, including an oculus at the top of the concrete shell; and a large parabolic vault opening that was designed to enable the excavator to remove the earth of the earth-form after the reinforced concrete shell had been cast and after the concrete had reached its desired strength. This innovative concrete shell experienced the 2003 San Simeon, California earthquake. The object of this study is to focus on the seismic response, behavior and design of such an innovative concrete shell subjected to the 2003 San Simeon, California earthquake. The seismic analysis shell model also includes a more realistic modeling of the ring beam at the base of the as-built concrete shell structure. The results include an estimate of the magnitude of axial forces in the ring beam, as well as the bending moments and shears that must be designed for. The design included a concrete shell thickness that gradually increased toward the ring beam at the base. The state-of-the-art code provisions and seismic design criteria for such a concrete shell are presented. The results include the probable maximum base shears, axial forces, displacements, circumferential as well as meridional membrane stresses in the concrete shell, under the effects of the 2003 San Simeon earthquake. It is hoped that the results of this study will help improve our understanding of the earthquake resistance, behavior and design of concrete shell structures located in seismic zones.

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