Modeling Reinforced-Concrete Beam-Column Joints Subjected to Cyclic Loading

Dynamic Simulation of an Irregular Masonry Building With Different Rehabilitation Methods Applied to Timber Floors

“…The floor models were obtained subdivided the plan dimensions into a mesh of 6x4 floor modules (Figure 4a), having dimensions of 0.8x0.8m, in order to distribute the nodal masses ( Figure 4b) and to fit the discretization used in the wall modelling. Pinching4 model [13] was used to simulate the actual in-plane hysteretic behaviour of the floors characterized by the pinching phenomenon typical of dowel-type fasteners embedded in timber members and cyclically loaded in shear. The non-linear parameters of the floor modules were calibrated fitting the forces-displacement curves obtained from results of cyclic-loading tests available in literature ( [1], [14]), Figure 5.…”

A New Discrete Macro-Node Element for the Seismic Behaviour Modelling of Reinforced Concrete Frames

“…The basic element can be described by referring to a simple mechanical representation in which the element is regarded as an articulated quadrilateral endowed with along-side interfaces that, consistently to a fibre discretization, account for both the concrete and steel bars contributions. This macro-node possesses some similarities to the joint model proposed by Lowes and Altoontash [12], modified by Mitra, and Lowes [13] in order to simulate the behaviour of the joints without transversal steel reinforcements, afterwards calibrated and validated in [14][15][16]. However in the approach proposed herein the interfaces are discretized according to a detailed fibre discretization accounting for node and beams concrete and steel contributions.…”

Development and validation of a metallic haunch seismic retrofit solution for existing under-designed RC frame buildings

“…It 19 is worth recalling that when assessing the seismic performance of existing pre-1970s buildings) under-designed or designed-for-gravity-only buildings via numerical/analytical investigations, an 21 adequate modelling of the complex inelastic behaviour of the whole frame system, including the joint panel zone is a complex but essential task [13,15,16]. In particular, alternative approaches 23 for modelling the RC beam-column joint, ranging from simplified empirical or macro-models (single-or multi-spring models) to refined finite elements models, are available in literature and 25 under continuous development and validation with experimental results.…”

“…A detail discussion on the topic is out of the scope of this contribution. Recent proposals including overviews and summary 27 of available methods/models can be found in References [13,16]. Comparative performance of beam-column joints as well as multi-storey frames for as-built (pre-1970s design) and for retrofitted 29 configurations were carried out through either push-pull (cyclic) or non-linear time-history numerical analyses.…”

“…The readers are referred to References [13,15,16] for recent overviews of 23 different analytical procedures reported in the literature.…”