User profiles for Roberto Leon

Roberto Leon

DH Burrows Professor of Construction Engineering, Virginia Tech
Verified email at vt.edu
Cited by 7448

Bolted steel connections: tests on T-stub components

JA Swanson, RT Leon - Journal of Structural Engineering, 2000 - ascelibrary.org
The results of tests on 48 T-stub specimens are presented and discussed. These tests were
carried out as part of a SAC Phase II project in order to provide insight into the behavior, …

Steel beam-column connections using shape memory alloys

J Ocel, R DesRoches, RT Leon, WG Hess… - Journal of Structural …, 2004 - ascelibrary.org
This study evaluates the feasibility of a new class of partially restrained connections using
shape memory alloys. In the martensitic form, shape memory alloys (SMAs) have the ability to …

Parametric analysis of steel bolted end plate connections using finite element modeling

YI Maggi, RM Gonçalves, RT Leon… - Journal of Constructional …, 2005 - Elsevier
This paper presents and discusses results of parametric analyses on the behavior of bolted
extended end plate connections using Finite Element (FE) modeling tools. The analyses …

Experimental results of a NiTi shape memory alloy (SMA)-based recentering beam-column connection

MS Speicher, R DesRoches, RT Leon - Engineering structures, 2011 - Elsevier
A half-scale interior beam-column connection incorporating superelastic nickel-titanium
shape memory alloy (SMA) tendons was designed, fabricated, and tested to assess the …

Design and analysis of braced frames with shape memory alloy and energy-absorbing hybrid devices

CSW Yang, R DesRoches, RT Leon - Engineering Structures, 2010 - Elsevier
A hybrid seismic device that provides both energy-absorbing and re-centering capabilities
to overcome external forces is developed and evaluated. The hybrid device is composed of …

Passive wireless antenna sensor for strain and crack sensing—Electromagnetic modeling, simulation, and testing

…, Y Wang, MM Tentzeris, RT Leon - Smart Materials and …, 2013 - iopscience.iop.org
This research investigates a passive wireless antenna sensor designed for strain and crack
sensing. When the antenna experiences deformation, the antenna shape changes, causing …

Advanced finite element modeling of bolted T-stub connection components

JA Swanson, DS Kokan, RT Leon - Journal of Constructional Steel …, 2002 - Elsevier
The results of a finite element investigation of the behavior of T-stub flanges are presented
and compared to experimental data. Two types of models were employed; a three …

Shear strength and hysteretic behavior of interior beam-column joints

RT Leon - Structural Journal, 1990 - concrete.org
The performance of four half-scale interior joints with respect to joint shear stress and beam
bar anchorage lengths is described. The main variable in the tests was the column depth, …

Stiffness modeling of bolted T-stub connection components

JA Swanson, RT Leon - Journal of structural engineering, 2001 - ascelibrary.org
The results of 48 T-stub component tests and eight full-scale T-stub connection tests are used
to develop and calibrate a comprehensive T-stub connection stiffness model. The model, …

Shape memory alloy tension/compression device for seismic retrofit of buildings

…, DE Hodgson, R DesRoches, RT Leon - Journal of materials …, 2009 - Springer
A tension/compression device is developed for applications as bracing elements in buildings.
The device is designed to allow Nitinol forms, such as helical springs or Belleville washers…