Response of partially-restrained bolted beam-to-column connections under cyclic loads

Dissipating Effect of Glazed Curtain Wall Stick System Installed on High-Rise Mega-Braced Frame-Core Buildings Under Nonlinear Seismic Excitation

“…On the other hand, the insight on the well-known physical phenomena allows their easy calibration into classical fiber-based FE models, saving significant computational time. In this light, since a three-dimensional approach would be extremely onerous to investigate the full-scale mega-frame dynamic response, the contribution of the resisting frame system was easily incorporated into classical fibre force-based [13] FE models, able to represent bolted [14,15,16,17,18] and welded [11,19,20,21] connections, and the other members besides. By contrast, aiming to develop a qualified façade numerical model and to understand the phenomena underpinning the mechanical global behavior, detailed brickbased FE simulations were performed in order to assess the aluminium frame deformability, the interaction between glass panels and aluminium frame, the gasket mechanical distortion and the transom-to-mullion connection stiffness.…”

“…Prospective buckling mechanisms in both braces and gusset plates were considered applying an out-of-plane imperfection equal to 0.1% of the length at its midspan. Similarly, according to [12,14,15,16,18,39,40,42], the Tstub bolted joint mechanical idealization was assumed to reproduce the hysteresis behavior, as a partially restrained connection. Accordingly to the Grant and Priestley paradigm [41], when considering the tangent stiffness-proportional Rayleigh damping, the stiffness-proportional matrix multiplying coefficient used to perform nonlinear dynamic analyses was correlated to the damping ratio associated to the fundamental period of the structure [38,41,42,43].…”

Experimental and Numerical Study on Single-Bolted Cold-Formed Angles under Tension and Compression

“…In addition, tied constraint is used for the case of bolt-bolt nut contact. Interesting details are included in Brunesi et al (2014), about the contact conditions simulation as well as the bolt pretension. Some simplifications are allowed to be used in order to overcome convergence difficulties.…”

Seismic Retrofit of Defective RC Beam-Column Joints

“…Through a series of FE analyses and by taking into account the effects of friction, bolt pretension and the relative slippage of components, the authors were able to replicate the cyclic-reversal test protocol. To evaluate how much partially restrained (PR) bolted beam-column connections affect the overall dynamic response of MRF buildings subjected to seismic excitation, a numerical process incorporating 3D solid and 1D fibre based finite element models were constructed and verified using previous experimental data [31]. A method by the name of "planar joint expansion" was recommended by Pimanmas and Chaimahawan [19,32] which involves broadening the shear area of the joint by using on-site cast reinforced concrete.…”