scholarly journals Soil-structure interaction analysis considering concrete creep and shrinkage

2018 ◽  
Vol 11 (3) ◽  
pp. 564-585 ◽  
Author(s):  
L. M. P. ROSA ◽  
B. R. DANZIGER ◽  
E. M. L. CARVALHO
Keyword(s):  
Structural Analysis ◽  
Structural Design ◽  
Soil Structure ◽  
Interaction Analysis ◽  
Shallow Foundation ◽  
Soil Structure Interaction ◽  
Foundation Design ◽  
Concrete Creep ◽  
Structure Interaction ◽  
Creep And Shrinkage

Abstract The paper presents some results from Rosa’s [1] research that aimed to verify the effect of creep and shrinkage of the concrete in soil-structure interaction. The construction consists in a 17 storeys building. It is set down on shallow foundation, in the central part of the construction, and steel piles, on the boundary. The structure was submitted to instrumentation during construction, including the monitoring of foundation settlements and columns deformation. It was possible to compare the structural design with a numerical refined structural analysis. Comparisons of the structural and foundation design with and without due consideration of soil-structure interaction are also presented. Finally, the different design assumptions were confronted with instrumentation results, both related to foundation settlements and to columns loading as well. Attention is pointed out on the effect of concrete creep and shrinkage in the soil-structure interaction analysis.

DIRECT APPROACH TO SEISMIC SOIL – STRUCTURE–INTERACTION ANALYSIS – BUILDING GROUP CASE

2010 ◽  
Vol 2 (1) ◽  
pp. 22-30 ◽  
Author(s):  
Abdelhacine Gouasmia
Keyword(s):  
Structural Analysis ◽  
Soil Structure ◽  
Interaction Analysis ◽  
Soft Soil ◽  
Near Field ◽  
Soil Layer ◽  
Careful Consideration ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Response Amplification

Nowadays, the new and emerging concept of seismic structural design, the so-called performance-based design, requires careful consideration of all aspects involved in structural analysis. One of the most important aspects of structural analysis is soil-structure interaction (SSI). Such interaction may alter the dynamic characteristics of structures and consequently may be beneficial or detrimental to the performance of structures. In order to observe such effects we study the seismic response of an idealized small city composed of five equally spaced, five storey reinforced concrete buildings anchored in a soft soil layer overlaid by a rock half-space. Our results show predict response amplification of the buildings in the near field in accordance with the results observed in similar cases.

State-of-the-Art Techniques for Seismic Soil-Structure Interaction Analysis of Steel Gravity Structures

2014 ◽  
Author(s):  
Frederick Tajirian ◽  
Mansour Tabatabaie ◽  
Basilio Sumodobila ◽  
Stephen Paulson ◽  
Bill Davies
Keyword(s):  
Soil Structure ◽  
State Of The Art ◽  
Interaction Analysis ◽  
Layered Soil ◽  
Soil Structure Interaction ◽  
Soil System ◽  
Cyclonic Storm ◽  
Structure Interaction ◽  
Analysis Methods ◽  
Moderate Seismicity

The design of steel jacket fixed offshore structures in zones of moderate seismicity is typically governed by Metocean loads. In contrast the steel gravity structure (SGS) presented in this paper, is a heavy and stiff structure. The large mass results in foundation forces from seismic events that may exceed those created by extreme cyclonic storm events. When computing the earthquake response of such structures it is essential to account for soil-structure interaction (SSI) effects. Seismic SSI analysis of the SGS platform was performed using state-of-the-art SSI software, which analyzed a detailed three-dimensional model of the SGS supported on layered soil system. The results of this analysis were then compared with those using industry standard impedance methods whereby the layered soil is replaced by equivalent foundation springs (K) and damping (C). Differences in calculated results resulting from the different ways by which K and C are implemented in different software are presented. The base shear, overturning moment, critical member forces and maximum accelerations were compared for each of the analysis methods. SSI resulted in significant reduction in seismic demands. While it was possible to get reasonable alignment using the different standard industry analysis methods, this was only possible after calibrating the KC foundation model with software that rigorously implements SSI effects. Lessons learned and recommendations for the various methods of analysis are summarized in the paper.

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