Seismic performance of dual-steel moment resisting frames

Nonlinear Behaviour, Design and Analysis of Steel Structures: Recent Findings and New Trends for the Next Generation of European Design Standards

“…The paper by Tenchini et al [24] investigates the potential advantages of using high strength steel in the seismic design of chevron braced frames. In line with former studies carried out by those authors [25,26], the actual benefit of using high strength steel is quite limited for medium rise buildings. A very interesting paper on buckling restrained braces (BRBs) was presented by Zsarnóczay et al [27], which completes this thematic issue.…”

The influence of beam stiffness on seismic response of chevron concentric bracings

“…All steel members (i.e., beams, bracings and columns) have cross section satisfying the Class 1 requirements according to EN 1993:1-1 [7]. In particular, for the EC8-compliant frame the dual steel concept [19,[48][49][50][51] was used in order to reproduce an even more common design practice consisting in minimizing the beam depth to limit architectural interference. Therefore, S 235 steel grade was used for the dissipative elements (i.e., diagonal members), S 460 steel grade for beams of the braced bays and S 355 steel grade for columns.…”

High strength steel in chevron concentrically braced frames designed according to Eurocode 8

“…Notwithstanding this consideration, Hoang et al [1] showed that in sway frames the use of HS steel entails some disadvantages, because the structural design is influenced by stiffness criteria to reduce lateral displacements. More recently, Tenchini et al [2] confirmed this result highlighting the limited benefit in using HS steel for seismic application in moment resisting frames (MRFs) compared to using solely MC steel, because the design of MRFs is conditioned by the need to guarantee lateral stability and to satisfy the performance limits in terms of story displacements. On the contrary, when the seismic design is associated to Theory of Plastic Mechanism Control (TPMC) [3][4][5][6][7][8][9][10][11][12][13][14][15], the HS steel has provided adequate seismic performance where it is possible to see a reduction of the steel weight compared to frames in complacent with European code.…”