Seismic Behavior of Frame-Wall-Rocking Foundation Systems. I: Test Program and Slow Cyclic Results

AbstractThe mechanism of foundation rocking has received much attention recently due to its appealing seismic resistant features, namely, self-centering tendency and energy dissipation capability. It is well recognized, however, that other inelastic mechanisms will contribute to a system’s seismic resistance. Considering the strength difference between a rocking footing and a shear wall structural fuse, and the system symmetry, six different two-story-two-bay frame-wall-foundation building models were constructed and tested in a geotechnical centrifuge. In this paper, the test program and experimental results when the models were subjected to slow cyclic loading are presented. A companion paper presents results from the dynamic phase of testing. Results indicate that, with the aid of foundation rocking, the system behaves in a ductile and stable manner with no strength degradation, even when the model is pushed to a drift of more than 2.5%. Importantly, when structural and foundation component strengths a...

[1]  Marianna Loli,et al.  Shaking Table Testing of Rocking—Isolated Bridge Pier on Sand , 2013 .

[2]  Roberto Paolucci,et al.  The role of non-linear dynamic soil-foundation interaction on the seismic response of structures , 2014, Bulletin of Earthquake Engineering.

[3]  Ioannis Anastasopoulos,et al.  Rocking isolation of low‐rise frame structures founded on isolated footings , 2012 .

[4]  G. Mosqueda,et al.  Research Needs for Seismic Rehabilitation of Sub-standard Buildings using Stiff Rocking Cores , 2013 .

[5]  Babak Alavi,et al.  Strengthening of moment‐resisting frame structures against near‐fault ground motion effects , 2004 .

[6]  Bruce L. Kutter,et al.  Recent Advances in Centrifuge Modeling of Seismic Shaking , 1995 .

[7]  José I. Restrepo,et al.  Seismic performance of self-centering structural walls incorporating energy dissipators , 2007 .

[8]  Prishati Raychowdhury,et al.  Performance evaluation of a nonlinear Winkler‐based shallow foundation model using centrifuge test results , 2009 .

[9]  Masahiro Shirato,et al.  Seismic behaviour of shallow foundations: Shaking table experiments vs numerical modelling , 2008 .

[10]  Sandro Carbonari,et al.  Nonlinear seismic behaviour of wall‐frame dual systems accounting for soil–structure interaction , 2012 .

[11]  J. W. Meek,et al.  Dynamic behaviour of building‐foundation systems , 1974 .

[12]  José I. Restrepo,et al.  Shake-Table Tests of Confined-Masonry Rocking Walls with Supplementary Hysteretic Damping , 2009 .

[13]  Sivapalan Gajan,et al.  Effects of Moment-to-Shear Ratio on Combined Cyclic Load-Displacement Behavior of Shallow Foundations from Centrifuge Experiments , 2009 .

[14]  Jonathan D. Bray,et al.  Nonlinear dynamic foundation and frame structure response observed in geotechnical centrifuge experiments , 2013 .

[15]  Sivapalan Gajan,et al.  Capacity, Settlement, and Energy Dissipation of Shallow Footings Subjected to Rocking , 2008 .

[16]  M. Menegotto.  Method of Analysis for Cyclically Loaded R. C. Plane Frames Including Changes in Geometry and Non-Elastic Behavior of Elements under Combined Normal Force and Bending , 1973 .

[17]  Weian Liu.  Balancing the Beneficial Contributions of Foundation Rocking and Structural Yielding in Moment-Frame and Frame- Wall Building Systems / , 2014 .

[18]  Lijun Deng,et al.  Characterization of rocking shallow foundations using centrifuge model tests , 2012 .

[19]  Tara C. Hutchinson,et al.  New Findings from Centrifuge Modeling of Rocking Shallow Foundations in Clayey Ground , 2012 .

[20]  Gokhan Pekcan,et al.  Rocking Wall–Frame Structures with Supplemental Tendon Systems , 2004 .

[21]  Tara C. Hutchinson,et al.  Seismic Behavior of Frame-Wall-Rocking Foundation Systems. II: Dynamic Test Phase , 2015 .

[22]  Sashi K. Kunnath,et al.  Demonstration of Compatible Yielding between Soil-Foundation and Superstructure Components , 2013 .