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Search Publications by: Jonathan Weigand (Fed)

Displaying 26 - 50 of 64

QUANTIFICATION OF UNCERTAINTIES IN THE RESPONSE OF BEAM-COLUMNS IN STEEL MOMENT FRAMES

June 25, 2018

Author(s)

Siamak Sattar, Jonathan M. Weigand, Kevin K. Wong

Various sources of uncertainties including material, modeling, and loading uncertainties can have a significant influence on prediction of earthquake-induced damage and estimates of the collapse risk of a building obtained through the performance-based

New Connections for Enhancing Robustness of Precast Concrete Frame Structures

February 24, 2018

Author(s)

Travis E. Thonstad, Yihai Bao, Jonathan M. Weigand, Joseph A. Main, Hai S. Lew

A recent experimental and computational study of two precast concrete moment-frame assemblies under a column removal scenario revealed vulnerabilities in the moment connections arising from (a) local bending of reinforcing bars due eccentricity in the

Thermal performance of composite slabs with profiled steel decking exposed to fire effects

February 5, 2018

Author(s)

Jian Jiang, Joseph Main, Jonathan Weigand, Fahim H. Sadek

This paper presents detailed numerical modeling of heat transfer in composite floor slabs with profiled steel decking. The detailed modeling approach represents the concrete slab with solid elements and the steel decking with shell elements. After

Closure to "Component-Based Model for Single-Plate Shear Connections with Pretension and Pinched Hysteresis"

October 16, 2017

Author(s)

Jonathan M. Weigand

Behaviour of high-strength bolts at elevated temperatures under double-shear loading

September 13, 2017

Author(s)

Mina S. Seif, Jonathan M. Weigand, Rafaela Peixoto, Luiz Vieira

During fire events, connections in steel structures may be subjected to large unanticipated deformations and loads. Those fire effects can produce failures of connections, including local buckling of the connection zone, rupture of connection plates, shear

Performance of Composite Beams in Fire: Pre-test Analysis of Full-scale Experiments

July 23, 2017

Author(s)

Joseph Main, Fahim H. Sadek, Jonathan Weigand, Jian Jiang, Lisa Choe, Selvarajah Ramesh, Matthew Hoehler, John L. Gross

This paper presents results from pre-test analysis of a full-scale 42 ft (12.8 m) span composite beam with bolted angle connections, under uniform gravity loading simulated using six equally spaced concentrated loads, and subjected to a 4000 kW compartment

Numerical Modeling and Analysis of Heat Transfer in Composite Slabs with Profiled Steel Decking

April 25, 2017

Author(s)

Jian Jiang, Joseph A. Main, Fahim Sadek, Jonathan M. Weigand

This report presents detailed and reduced-order finite element modeling of heat transfer in composite floor slabs with profiled steel decking. The detailed modeling approach uses solid elements for the concrete slab and shell elements for the steel decking

Acceptance Criteria for Nonlinear Alternative Load Path Analysis of Steel and Reinforced Concrete Frame Structures

April 5, 2017

Author(s)

Jonathan Weigand, Yihai Bao, Joseph Main

Alternative load path analysis is the primary approach for evaluating the potential for disproportionate collapse in structural design. In this approach, individual load-bearing elements are notionally removed from a structure, and the remaining structure

Modeling of double-angle connections for robustness evaluation of steel gravity frames

October 13, 2016

Author(s)

Jonathan Weigand, Judy Liu, Joseph Main

Component-based models of bolted double-angle beam-to-column connections have been developed for evaluating the structural robustness of steel gravity frames. The component-based models were developed based on results from high-fidelity finite-element

STEEL GRAVITY CONNECTIONS SUBJECTED TO LARGE ROTATIONS AND AXIAL LOADS

October 13, 2016

Author(s)

Jonathan M. Weigand, Jeffrey W. Berman

Steel gravity framing systems (SGFSs) rely on connections for system robustness when a column suffers damage that compromises its ability to carry gravity loads. Redistribution of gravity loads through the development of a sustained tensile configuration

DEFORMATION LIMITS AND ROTATIONAL CAPACITIES FOR CONNECTIONS UNDER COLUMN LOSS

October 12, 2016

Author(s)

Jonathan Weigand, Joseph Main

For structural steel framing systems subjected to column loss, the ultimate gravity load carrying capacity of the system is often controlled by the rotation and deformation capacities of the connections within the affected bays. Within current design

Enhanced connections for improved robustness of steel gravity frames

October 12, 2016

Author(s)

Jonathan Weigand, Joseph Main

Potential vulnerabilities to collapse have been identified for steel gravity framing systems with conventional gravity connections subjected to column loss. To address these potential vulnerabilities, a high-fidelity finite element modeling approach is

New Component-Based Model for Single Plate Shear Connections with Pretension and Pinched Hysteresis

September 23, 2016

Author(s)

Jonathan M. Weigand

The behavior of single plate shear connections under extreme loads is complex. However, component-based connection models provide a natural framework for modeling these complexities, by capturing both the individual behaviors of the connection components