Seismic Analysis of Intake Towers Considering Multiple-support Excitation and Soil-structure Interaction Effects PDF Download
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Author:
Publisher:
ISBN:
Category : Earthquake hazard analysis
Languages : en
Pages : 91
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Author:
Publisher:
ISBN:
Category : Earthquake hazard analysis
Languages : en
Pages : 91
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Author: Aidcer L. Vidot Vega
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 226
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Author: Jaime A. Mercado
Publisher:
ISBN:
Category :
Languages : en
Pages : 175
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Book Description
Soil-structure interaction (SSI) effects are relevant for the seismic analysis of tall buildings on shallow foundations since the dynamic behavior of structures is highly affected by the interaction between the superstructure and supporting soils. As part of earthquake-resistant designs of buildings, considering SSI effects in the analysis provides more realistic estimates of its performance during a seismic event, particularly when both the structure and soil undergo large demands that can compromise serviceability. Oversimplifications of structural or soil modeling in the analysis introduces variability and biases in the computed seismic response.
Author: Alok Goyal
Publisher:
ISBN:
Category : Briones Dam (Calif.)
Languages : en
Pages : 448
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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The seismic design of secondary systems such as piping requires knowledge of the motions at various locations of the primary structures. When the structure or buildings are subjected to earthquake-like excitations at the ground level, the responses at different floor levels may be quite different from each other. This difference depends on the building and soil frequency characteristics, the characteristics of the input signals, the damping levels, and soil-structure interaction effects. When multiple independent excitations are considered in the analysis of piping systems, the responses can be considered to have two distinct components. One is due to the inertia of masses alone (dynamic component) and the other is due to the time varying differential motion of the support points (pseudo-static component). To address this problem, a sample of six piping systems, two of which were subjected to thirty-three earthquakes, were studied to develop a statistical assessment of different methods of predicting the dynamic, pseudo-static and combined response. Both uniform and independent support motion methods were considered. The results are obtained in tabular form. The mean and standard deviation for the two piping systems subjected to thirty-three earthquakes were obtained to allow an assessment of the adequacy and level of conservatism associated with each method. These results are also displayed in graphical form for selected, critical locations in the piping systems. The limitations of each method and recommendations are discussed.
Author: Luis Fernando Gonzalo Vásquez Chicata
Publisher:
ISBN:
Category :
Languages : en
Pages : 290
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Author: Q. A. Hossain
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
While developing seismic analysis models for buildings that support safety-related equipment, a number of issues should be considered to ensure that the input motions for performing seismic qualification of safety-related equipment are properly defined. These considerations are listed and discussed here with special attention to the effect and importance of the interaction among the foundation soil, the building structure, the equipment anchors, and the equipment structure. Typical industry practices are critically examined to assess their adequacy for determining the input motions for equipment seismic qualification. The features that are considered essential in a soil-structure interaction (SSI) model are described. Also, the effects of inappropriate treatment or representation of these features are discussed.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 98
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Author:
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ISBN:
Category :
Languages : en
Pages : 5
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The Process, Purification and Stack Buildings are collocated safety related concrete shear wall structures with plan dimensions in excess of 100 feet. An important aspect of their seismic analysis was the determination of structure soil structure interaction (SSSI) effects, if any. The SSSI analysis of the Process Building, with one other building at a time, was performed with the SASSI computer code for up to 50 frequencies. Each combined model had about 1500 interaction nodes. Results of the SSSI analysis were compared with those from soil structure interaction (SSI) analysis of the individual buildings, done with ABAQUS and SASSI codes, for three parameters: peak accelerations, seismic forces and the in-structure floor response spectra (FRS). The results may be of wider interest due to the model size and the potential applicability to other deep soil layered sites. Results obtained from the ABAQUS analysis were consistently higher, as expected, than those from the SSI and SSSI analyses using the SASSI. The SSSI effect between the Process and Purification Buildings was not significant. The Process and Stack Building results demonstrated that under certain conditions a massive structure can have an observable effect on the seismic response of a smaller and less stiff structure.
Author: Amar Mahmood Rahman
Publisher:
ISBN:
Category : Soil-structure interaction
Languages : en
Pages : 190
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