Effects of Corrosion on Compressive Arch Action and Catenary Action of RC Frames to Resist Progressive Collapse Based on Numerical Analysis

Abstract

Many negative factors can influence the progressive collapse resistance of reinforced concrete (RC) frame structures. One of the most important factors is the corrosion of rebar within the structure. With increasing severity of corrosion, the duration, robustness, and mechanical performance can be greatly impaired. One specific side effect of rebar corrosion is the significant loss of protection against progressive collapse. In order to quantify the effects of rebar corrosion on load-resisting mechanisms (compressive arch action (CAA) and tensile catenary action (TCA)) of RC frames, a series of numerical investigations were carried out in this paper. The previous experimental results reported in the literature provide a benchmark for progressive collapse behavior as a sound condition and validate the proposed numerical model. Furthermore, based on the verified numerical model, the CAA and TCA with increasing corrosion and an elapsed time from 0 to 70 years are investigated. Comparing with the conventional empirical model, the proposed numerical model has shown the ability and feasibility in predicting the collapse resistance capacity in structures with corroded rebar. Therefore, this numerical modeling strategy provides comprehensive insights into the change of load-resisting mechanisms in these structures, which can be beneficial for optimizing the design.

Strengthening of Reinforced Concrete Beams Subjected to Concentrated Loads Using Externally Bonded Fiber Composite Materials

“…Then, a lot of research activity has been devoted to studying beam action and arch action. Some of the many references are [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ].…”

Progressive Collapse Safety Evaluation of Truss Structures Considering Material Plasticity

“…Finding critical progressive collapse paths is the key for evaluating the anti-collapse performance of a structure. Numerical simulation is mostly employed for path searching [ 3 , 4 , 10 ]. However, it requires adequate modeling experience of engineers.…”

“…The progressive collapse of a structure often starts from the failure of components within a local region. Such failure might overspread the whole structure, eventually leading to the collapse event [ 4 ]. Therefore, how to avoid progressive collapse is an important issue in structural design, construction and operation.…”

Reinforced Concrete Beam under Support Removal—Parametric Analysis

“…where x can be regarded as a counterpart of x at the design point and differs inconsiderably from the vector x while the covariance matrix of u can be written as Σ = J −1 u,x (J −1 u,x ) T . Using Equation (16) in the formula for g u1 (u) and taking into account that β = αu * leads to g u1 (u) = − ∇g u αJ u,x ( x − x * ). Hence, the variance of g u1 (u) can be expressed as…”

“…The behaviour of reinforced concrete structures is a challenging subject, not only in static analyses (e.g., Dudziak [12]) and dynamic earthquake engineering (e.g., Paulay and Priestley [13]) but also in dynamic analyses under accidental loads acting on structures (e.g., Ellingwood [14] and Grierson et al [15]). In particular, the progressive collapse caused by excessive corrosion [16], earthquake loads [17,18] or bidirectional seismic effects [19], have been studied. At the material level, the reinforced concrete composite is a subject of extensive research in various areas such as the constitutive models, mechanical properties (e.g., Neville [20], Kent and Park [21], Scott et al [22], Mander et al [23], Galeota et al [24]), the effect of strain-rates (e.g., Scott et al [22], Mainstone [25], Asprone et al [26], Filiatrault and Holleran [27], du Beton [28,29], Malvar and Crawford [30], Fu et al [31], Bischoff and Perry [32], Malvar [33]), the assessment of concrete confinement [21,24,[34][35][36][37][38][39][40] or strengthening of reinforced concrete with fibre-reinforced polymer materials (e.g., Derkowski and Walczak [41]).…”