Henryk K. Stolarski

Locking-Free Optimal Discontinuous Galerkin Methods for Timoshenko Beams

In this paper, we consider the so-called

Instrumentation and Modeling of I-35W St. Anthony Falls Bridge

hp

On ‘strange’ properties of some symmetric inhomogeneities

-version of discontinuous Galerkin methods for Timoshenko beams. We prove that, when the numerical traces are properly chosen, the methods display optimal convergence uniformly with respect to the thickness of the beam. These methods are thus free from shear locking. We also prove that, when polynomials of degree

Finite element analysis of composite plates using a weak form of the Kirchhoff constraints

p

Non-linear rotation-free shell finite-element models for aortic heart valves

are used, all the numerical traces superconverge with a rate of order

A multiphysics model of the Pacinian corpuscle.

h^{2p+1}/p^{2p+1}

On Equivalent Inhomogeneities for Particles with Multiple-Component Interphases

. Numerical experiments verifying the above-mentioned theoretical results are shown.

Elastic Solutions for Eccentrically Loaded, Slender, Rectangular Spandrel Beams

The I-35W St. Anthony Falls Bridge was constructed to replace the steel truss bridge that collapsed on August 1, 2007. The design of the replacement bridge featured a smart-bridge system. The smart-bridge concept included instrumentation for long-term monitoring of the structural behavior of the bridge. Truck-load tests were conducted prior to opening the bridge and 26 months later to measure the response of the structure under controlled loading. The measurements were used to validate a FEM model of the bridge constructed to further investigate the behavior of the structure. The correlation between computed and measured results was found to be good. This paper describes the bridge, the instrumentation installed within the bridge, the FEM model, and validation of the model with respect to the truck-load tests. Recommendations are provided for static instrumentation plans of concrete box-girder structures.

I35W collapse, rebuild, and structural health monitoring - challenges associated with structural health monitoring of bridge systems

The paper presents an analysis of elasticity problems involving a single inhomogeneity which possesses certain types of symmetries. As observed earlier, isotropic problems of that kind exhibit some ‘strange’ and remarkable properties. Under the action of uniform far-field stresses, the averages of the fields inside the inhomogeneities preserve the structure of the far-field loads. Here, it is shown that these properties are exhibited for a wider class of problems, which include anisotropic and non-uniform materials subjected to either far-field loads or constant transformational strains within the inhomogeneity. The proposed modified Eshelby technique facilitates a straightforward analysis of these problems, which is based entirely on the assumed symmetry. It is also shown that some remarkable properties of symmetric inhomogeneities discovered here are related to the so-called ‘strange’ properties of the Eshelby inclusions extensively covered in the literature. Some implications of these findings are discussed.

Multiple interacting circular nano-inhomogeneities with surface/interface effects

Abstract A six-node triangular C0 plate element is developed using the assumed strain method. A weak form of the Kirchhoff constraints is used to define the assumed shear strain field. The element so developed is free of shear locking and performs well even when the element boundaries are curved. It is demonstrated that the element provides satisfactory results in the analysis of various composite plates.