Design Basis Ground Motion

2019 ◽  
pp. 29-60
Author(s):  
Hari Prasad Muruva ◽  
A. R. Kiran ◽  
Srijit Bandyopadhyay ◽  
G. R. Reddy ◽  
M. K. Agrawal ◽  
...  
Keyword(s):  
Ground Motion ◽  
Design Basis

Design for seismic torsional forces

1984 ◽  
Vol 11 (2) ◽  
pp. 150-163 ◽  
Author(s):  
J. L. Humar
Keyword(s):  
Ground Motion ◽  
Analytical Study ◽  
Critical Evaluation ◽  
Building Code ◽  
Rotational Ground Motion ◽  
Building Model ◽  
Design Basis ◽  
Building Models ◽  
Adequate Design ◽  
Code Provisions

An analytical study of the responses of a single storey and a multistorey building model to a combined translational and rotational ground motion is presented. The models, which are assumed to be elastic, are eccentric about one plan direction but are symmetric about the perpendicular direction. The ground excitations are represented by idealized spectra.A critical evaluation is made of the torsion provisions of the National Building Code of Canada. It is shown that the code provisions, while not necessarily nonconservative, are somewhat difficult to apply for multistorey buildings. An alternative provision for design eccentricity is proposed. The forces obtained by the use of the proposed method are compared with the analytical results of single storey and multistorey building models and are shown to provide an adequate design basis.

scholarly journals The evaluation of a reactivity insertion due to the group motion of FBR core subassemblies beyond Design Basis Ground Motion

2015 ◽  
Vol 53 (7) ◽  
pp. 1036-1047 ◽  
Author(s):  
Masahiko Ariyoshi ◽  
Akira Yamaguchi ◽  
Takashi Takata ◽  
Hiroshi Endo
Keyword(s):  
Ground Motion ◽  
Design Basis ◽  
Group Motion ◽  
Reactivity Insertion

scholarly journals Evaluation of a Group Motion for FBR Core Subassemblies under Seismic Condition of Design Basis Earthquake Ground Motion

2015 ◽  
Vol 14 (2) ◽  
pp. 113-122 ◽  
Author(s):  
Masahiko ARIYOSHI ◽  
Akira YAMAGUCHI ◽  
Takashi TAKATA ◽  
Hiroshi ENDO
Keyword(s):  
Ground Motion ◽  
Earthquake Ground Motion ◽  
Design Basis ◽  
Group Motion

Soil Structure and Fluid Interaction Assessment of New Modular Reactor: Part 2 — Numerical Study of Soil Reactor Structure Interaction

2014 ◽  
Author(s):  
Amitava Ghosh ◽  
Kaushik Das ◽  
Debashis Basu ◽  
Larry Miller
Keyword(s):  
Ground Motion ◽  
Soil Structure ◽  
Numerical Study ◽  
Nuclear Industry ◽  
Structural Deformation ◽  
Ground Acceleration ◽  
Isolation System ◽  
Reactor Structure ◽  
Design Basis ◽  
Fluid Interaction

To meet the growing demand of affordable power, several designs of Small Modular Reactors (SMRs), which will be installed below-grade, have been proposed by the nuclear industry. The containment vessels of these reactors will be under water. During a seismic event, these reactors will experience a complex soil (ground)-structure (SMR)-fluid (water) interaction that can affect the integrity of the system. Each of these reactors uses a seismic damping or isolation system to protect its important to safety structures, systems, and components from a design-basis earthquake. Designers of these damping/isolation systems need to have a thorough understanding of the complex soil-structure-fluid interactions to ensure the adequacy of the isolation system. In addition, regulators need to understand these interactions to evaluate the safety of such installations and systems. This study was initiated to understand the complexities in modeling facility responses that may accompany a design-basis earthquake. The ability to model these complexities is important to designers and regulators. It was recognized that a three-way coupled approach that can satisfactorily model the unique dynamic characteristics of soil surrounding the reactor, the reactor structure, and fluid contained within the reactor is not available. As a first step in understanding the complex interaction phenomena, a sequential coupling approach was adopted in this study. It was assumed that the feedback loop (such as structural deformation affecting ground motion and sloshing) has limited influence because of the high inertia of the massive structure. The general-purpose geological continuum package FLAC was used to simulate the propagation of earthquake-generated ground motion. The fluid analysis was conducted using the commercial computational fluid dynamics (CFD) package ANSYS-FLUENT. This paper briefly discusses the modeling techniques used in soil-structure and structure-fluid interaction analyses. Using a strong motion earthquake record, the ground acceleration at the base of the SMR was calculated and used as input to the CFD analysis of fluid motion inside the structure.

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