Experimental Tests of Steel Unstiffened Double Side Joints with Flush and Extended End Plate

Abstract

Experimental tests of steel unstiffened double side bolted end-plate joints have been presented. The main aim of the conducted tests was to check the behavior of joints in an accidental situation and possibility of creating secondary mechanism, i.e. catenary action in the scenario of column loss. Two types of end plate joints were tested: flush end-plate (FP) and extended end-plate (EP) with different thickness and different number of bolt rows in each. The tests were carried out on an isolated cross beam-column-beam type system until joint failure. During tests the available moment resistance and rotation capacity of bending joints and also values of tension forces in the beam were determined. The joints with extended end-plate have demonstrated higher bending and rotational capacity than flush end-plate. Significant deformation of column flanges, web and end plate were observed. The fracture of bolts was the failure mode of joints. Obtained results of axial force values in beam exceeded standard requirement what confirmed that the joints with unstiffened web column, flush or extended end-plate possess the ability of development the catenary action.

Novel bolted steel joint to improve anti‐collapse resistance of steel structure

“…The numerical analysis of AR joints were conducted at previously validated models as presented in paper [11] based on experimental tests [9] of pure double side flush end-plate joints. The results of validation of FEA model with experimental test results in Fig.…”

“…A new ideas for improving the load capacity and rotational capacity of extended bolt end-plate joints under large deformations were presented in [10]. Based on experimental [9] and numerical observations [11] of joint behavior additional elements (Fig. 1) such as additional rings (AR) was proposed to improve structural robustness of steel moment frame.…”

Numerical analysis of steel double side joints with flush and extended end plate under accidental situation

“…This element type has capability of representing geometrical and material nonlinearities, large deformations and fracture simulations. Six numerical models were created for six types of connections using Abaqus [15] software and validated by the experimental tests conducted by the authors [4].…”

“…The experimental results of two-dimensional frame system of this project were presented in details in [2,3]. To develop further research to mitigate progressive collapse of steel structures, the experimental tests of bolted end-plate joint presented in [4] were carried out. Six of double side beam to column with flush and extended end-plate joints were tested.…”

Shaping of Curvilinear Steel Bar Structures for Variable Environmental Conditions Using Genetic Algorithms—Moving towards Sustainability

“…The requirements of the design standards for steel structures are related conditions regarding load-bearing capacity, serviceability, reliability, resistance to exceptional impacts of the natural environment, etc., which are interrelated [3][4][5][6][7]. The important issue is the design and calculation of the joints and nodes of steel bar structures, whose behaviour is often tested in experimental way [8,9]. This is the reason why the shaping of any steel structure should be considered in terms of various aspects, such as the structure's function, safety, applied technology, and material cylindroid shapes are concerned, they are not as popular as the hyperbolic paraboloid ones and they receive little attention in the literature.…”