Experimental studies on a welded k-type joint of high-strength steel in a slim floor truss

Pooya Saremi, Wei Lu, Jari Puttonen, Dan Pada, Jyrki Kesti

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


The use of High-Strength Steel (HSS) and novel joints in trusses challenge the applicability of current European standards and stress the need of experimental results. Particularly, the lack of loading capacity required by the HSS member can be a challenge for many test facilities. This study resolves these challenges by a novel welded K-type truss joint made of S420 and S700 steel grades and by the use of dimensional analysis to reduce the size of the test samples. The procedure and results of experimental tests on the joints are presented. The specimens are isolated joints with scaled-down geometries to meet the available loading capacity. The Finite-Element Model (FEM) is created and validated against the test results of the S420- and S700-grade joints. The validated FEM is then used to estimate the failure mode of the S700-grade joints. This FEM is used to study the deformation and failure modes of this truss joint to enhance the design of similar K-type joints in practical design.
Original languageEnglish
Title of host publicationProceeding of 9th international conference on steel and aluminium structures ICSAS19
EditorsDennis Lam, Xianghe Dai, Therese Sheehan, Jie Yang, Kan Zhou
PublisherIndependent Publishing Network
Number of pages12
ISBN (Print)978-1-78972-197-3
Publication statusPublished - 2019
MoE publication typeA4 Conference publication
EventInternational Conference on Steel and Aluminium Structures - Bradford, United Kingdom
Duration: 3 Jul 20195 Jul 2019
Conference number: 9


ConferenceInternational Conference on Steel and Aluminium Structures
Abbreviated titleICSAS
Country/TerritoryUnited Kingdom


  • High-strength steel
  • Welded K-type tube-to-plate joint
  • long-span steel truss
  • slim floor system
  • sustainable steel buildings


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