An evaluation method to predict progressive collapse resistance of steel frame structures

Abstract

In the current work, a probabilistic assessment method of a steel framed building under abrupt removal of a column due to catastrophic events is developed. A multi-storey steel framed model taking into account the influence of catenary effect has been analyzed. Uncertainties in the structural variables are incorporated in the probabilistic simulation approach. Based on the changes of component internal energy, the progressive collapse sensitivity to abrupt removal of a column has been investigated. Besides, a simplified beam damage model is proposed to analyze the energies absorbed and dissipated by structural beams under large deflections. In addition, the correlation incorporating catenary action between bending moment and axial force in a beam during the whole deformation development process is studied. With the methodologies adopted for progressive collapse assessment under removal of a column, a deterministic method has been developed, framed within the Advanced First Order Reliability Method (AFORM). A robustness index (RI) is proposed to evaluate the structural robustness performance based on the acceptable probability of global failure and structural collapse probability.

Evolution characteristics and performance evaluation of extended end-plate joints with single and double side connections under cyclic loading

“…The actual structure is three-dimensional and spatial effects are not considered, and the existing analysis methods present some invalidity in the face of the multiple directions of external effects, the uncertainty of susceptibility and the randomness of the influencing factors [ 31 ], which cannot reproduce the complex working behavior and damage mechanisms of the joint structure. Moreover, due to the lack of theoretical concepts and the incompetence of technical methods, the large amount of strain data from the test that is not easily accessible is not sufficiently valued, which leads to the failure of this part of the data to give deep analysis [ 32 , 33 ], where new research tools have been needed to reveal the unseen effects of changes in the structural response on the evolution of the joint failure.…”

Enhancing progressive collapse resistance of steel structures using a new bolt sleeve device

“…Recently, there has been significant interest relating to the resistance of steel structures to progressive collapse under accidental loads such as seismic action [1,2], blast [2][3][4][5] and fire [2,6,7].…”

Progressive Collapse Safety Evaluation of Truss Structures Considering Material Plasticity

“…The negative effect of the missing component is simulated by the so-called conceptual removal method. A component is removed from the structure every time, and the mechanical behavior of the residual structure is analyzed to evaluate any negative effect [ 15 ]. A greater importance coefficient implies a higher possibility of collapse risk, meaning the damage or failure of this component is more likely to cause a progressive collapse of the structure.…”