| Autor: |
Trombetta, Nicholas W., Mason, H. Benjamin, Hutchinson, Tara C., Zupan, Joshua D., Bray, Jonathan D., Kutter, Bruce L. |
| Předmět: |
|
| Zdroj: |
Journal of Geotechnical & Geoenvironmental Engineering; May2014, Vol. 140 Issue 5, p1-11, 11p |
| Abstrakt: |
Utilizing a pair of building-foundation models placed in strategic configurations, two centrifuge tests were designed to evaluate nonlinear soil-foundation-structure interaction (SFSI) and structure-soil-structure interaction (SSSI) effects. The models were designed to represent a low-rise inelastic frame building founded on individual spread footings and a midrise elastic shear-wall building founded on a mat foundation designed to rock during seismic excitation. Four experimental cases are considered: (1) the baseline response of the low-rise frame structure; (2) the response of two structures placed adjacent to each other along the direction of earthquake shaking; (3) the response of two structures placed adjacent to each other perpendicular to the direction of earthquake shaking; and (4) the response of the frame structure when two wall structures are placed adjacent to it, such that both effects are promoted. Using spectral-analysis methods, it is demonstrated that the baseline frame structure responds independently from the influence of other structures being tested simultaneously and that wave-based SSSI effects have little practical influence on the SFSI response of an inelastic frame structure with highly nonlinear foundation responses. Measurements indicate that footing-force coupling contributes significantly to the seismic response of a frame structure with individual footings, as the nature of the oscillating vertical footing loads from frame action results in dynamic footing overturning moment and base shear capacities that vary significantly from their static values. The proximity of the dynamic footing-force combinations to the theoretical footing-force bounding surface is observed to significantly influence hysteretic footing response. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
