Neighborhood structure effects on the Dynamic response of soil-structure interaction by harmonic analysis

• Published in: MATEC Web of Conferences Vol. 31; p. 13005
• Main Authors: Pan, Dan-guang, Yu, Xin
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Les Ulis EDP Sciences 01.01.2015
• Subjects: Dynamic characteristics; Dynamic response; Equivalence; Fourier analysis; Harmonic analysis; Mathematical analysis; Mathematical models; Neighborhoods; Resonant frequencies; Seismic engineering; Seismic response; Soil dynamics; Soil investigations; Soil-structure interaction; Surface structure
• ISSN: 2261-236X; 2274-7214; 2261-236X
• DOI: 10.1051/matecconf/20153113005

For realizing the variation of structural dynamic characteristics due to neighbor structure in buildings group, the surface structure is idealized as an equivalent single degree of freedom system with rigid base whose site consists of a single homogeneous layer. Based on the model, a equivalent method on the equivalent seismic excitation is proposed. Then, the differences of seismic response and equivalent seismic input between soil - structure interaction (SSI) system and structure -soil-structure interaction (SSSI) system are investigated by harmonic analysis. The numerical results show that dynamic responses would be underestimated in SSSI system when the forcing frequencies are close to the Natural frequency if the effects of neighborhood structure were ignored. Neighborhood structure would make the translational displacement increase and rocking vibration decrease. When establishing an effective seismic input, it is necessary to consider the impact of inertia interaction.