4-legged bridge steel truss piers provide support for gravity, transverse, and longitudinal lateral loads of bridges. Allowing a controlled rocking response for seismic resistance of 4-legged truss piers requires the development of design equations considering ground motions in two horizontal directions and vertical excitation. First, the static kinematic and hysteretic bi-directional behavior ...

The dynamic stability of out-of-plane masonry walls can be assessed through non-linear analysis (rocking analysis), accounting for transverse walls, horizontal diaphragms and tie-rods. Steel tie-rods are widely spread in historical constructions to prevent dangerous overturning mechanisms simulated by proper elasto-plastic models. Conventionally, design guidelines suggest intensity-based assess...

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This study measures the effect of a vestibular stimulal10n program on the stereo typic rocking behavIor of three severely mentally retarded persons within both experimental and natural settmgs. A multiple baselme desIgn was used. Frequency and duration of stereotypic rocking behavior were measured by a partwl-intervaltime sample. Results indicated a statistically sIgnifIcant reduction of both f...

Façade overturning is a frequently observed collapse mechanism occurring in unreinforced masonry (URM) buildings during high-intensity, earthquake-induced shaking. Following complete separation from building, the rocking motion of URM façade and associated impact against return walls are factors that continue to contribute out-of-plane capacity. Seismic vulnerability studies façades have histor...

the asymmetric problem of rocking rotation of a circular rigid disk embedded in a finite depth of a transversely isotropic half-space is analytically addressed. the rigid disk is assumed to be in frictionless contact with the elastic half-space. by virtue of appropriate green's functions, the mixed boundary value problem is written as a dual integral equation. employing further mathematica...

The current study investigated the interpersonal coordination that occurred between two people when sitting side-by-side in rocking chairs. In two experiments participant pairs rocked in chairs that had the same or different natural periods. By instructing pairs to coordinate their movements inphase or antiphase, Experiment 1 investigated whether the stable patterns of intentional interpersonal...