Abstract This paper proposes a novel twin-column pier with steel shear link (SSL) installed in the cap beam to reduce seismic damage transverse direction. The SSL interrupts rigid and relieves coupled deformation of two columns. Benefits yieldable event strong earthquake are longer effective column limited axial compressive load. A benchmark reinforced-concrete bridge is employed performance ev...

This work studies the rate-dependent mechanical behavior of filament-wound fiber-reinforced polymer (FRP) composite pipes. Commercially available tubes with a filament winding angle ±55° were tested under cyclic axial compression for four loading rates. Stress relaxation constant strain was observed as well dependence stress on rate. A novel modeling methodology is presented to capture nonlinea...

BACKGROUND The major objective of the present study is to investigate the differences in the load and strain changes in the intertrochanteric region of human cadaveric femora between the loss of medial or lateral wall and after treatment with proximal femoral nail antirotation (PFNA). METHODS After measuring the geometry of the proximal femur region and modeling the medial or lateral wall def...

This paper presents the first near-real-time freehand ultrasound elastography system using a (3-D) mechanical probe. Acquisition is complete within two sec, and only an additional 20 sec are required for generation of a full 3-D strain volume. The strain is axial, with estimates of lateral and elevational tissue movement used to increase the accuracy of the axial strain measurement. This is the...

MRI cardiac tagging has been established as the gold standard in assessing intramyocardial displacement and strain. Yet, despite the high imaging quality of cardiac MRI, tagging techniques are limited by low spatial and temporal resolution. It has been recently shown that axial displacement and strain could be estimated and utilizing Bscan ultrasonography [1]. We compared and correlated intramy...

This paper investigates the distribution of principal strain by micro mechanical measurement of concrete axial strain in Reinforced Cement Concrete (RCC) moderate deep beams across its width and depths for various span-to-depth ratios. A complete shear deformational behavior along with load-deflection response, crack patterns and modes of failure were studied experimentally. Twelve beams were t...

The cervical facet joints are a source of pain in some chronic whiplash patients. Clinical data show that a head-turned posture increases the severity and duration of whiplash-related symptoms. The objective of this study was to quantify strains in the facet capsule during whiplash-like loading with an axial intervertebral pre-torque simulating an initial head-turned posture. These strains were...

This article presents a new method for acquiring three-dimensional (3-D) volumes of ultrasonic axial strain data. The method uses a mechanically-swept probe to sweep out a single volume while applying a continuously varying axial compression. Acquisition of a volume takes 15-20 s. A strain volume is then calculated by comparing frame pairs throughout the sequence. The method uses strain quality...

the relations of fibrolite-biotite are discussed by presenting data from the ardara aureole, nw ireland. biotite-fibrolite intergrowths are developed in all three aureole zones including: the outer kyanite-bearing andalusite zone, the middle kyanite-free andalusite zone and the inner prismatic sillimanite zone. a strain-assisted mechanism is proposed for the fibrolitisation of biotite in the ar...

We investigate the phase sensitivity of the fundamental mode of hollow-core photonic bandgap fibers to strain and acoustic pressure. A theoretical model is constructed to analyze the effect of axial strain and acoustic pressure on the effective refractive index of the fundamental mode. Simulation shows that, for the commercial HC-1550-02 fiber, the contribution of mode-index variation to the ov...