1st Edition

Tubular Structures XI 11th International Symposium and IIW International Conference on Tubular Structures

Edited By Jeffrey A. Packer, Silke Willibald Copyright 2006

    This topical book contains the latest scientific and engineering developments in the field of tubular steel structures, as presented at the "11th International Symposium and IIW International Conference on Tubular Structures". The International Symposium on Tubular Structures (ISTS) has a long-standing reputation for being the principal showcase for manufactured tubing and the prime international forum for discussion of research, developments and applications in this field.

    Various key and emerging subjects in the field of hollow structural sections are covered, such as: novel applications and case studies, static and fatigue behaviour of connections/joints, concrete-filled and composite tubular members, earthquake resistance, specification and code developments, material properties and structural reliability, impact resistance and brittle fracture, fire resistance, casting and fabrication innovations. Research and development issues presented in this book are applicable to buildings, bridges, offshore structures, entertainment rides, cranes, towers and various mechanical and agricultural equipment. This book is thus a pertinent reference source for architects, civil and mechanical engineers, designers, steel fabricators and contractors, manufacturers of hollow sections or related construction products, trade associations involved with tubing, owners or developers of tubular structures, steel specification committees, academics and research students.

    The conference presentations herein include two keynote lectures (the International Institute of Welding Houdremont Lecture and the ISTS Kurobane Lecture), plus finalists in the CIDECT Student Papers Competition. The 11th International Symposium and IIW International Conference on Tubular Structures – ISTS11 – took place in Québec City, Canada from August 31 to September 2, 2006.

    A. Applications & case studies

    • Tubular structures for liquid design architecture
    • Tubular steel roof for Spencer Street railway station in Melbourne, Australia
    • João Havelange Olympic Stadium–Tubular arches of suspended roof
    • Roof of Santa Caterina market in Barcelona
    • Advantages of using tubular profiles for telecommunication structures
    • Survey of support structures for offshore wind turbines

    1. Fatigue & fracture

    • Fatigue of bridge joints using welded tubes or cast steel node solutions
    • Probabilistic fatigue analysis of a post-weld treated tubular bridge
    • Notch stress factor of welded thick-walled tubular dragline joints by effective notch stress method
    • Effect of thickness and joint type on fatigue performance of welded thin-walled tube-to-tube T-joints
    • Welded thin-walled RHS-to-RHS cross-beams under cyclic bending
    • Effects of hydrogen removal heat treatment on residual stresses in high strength structural steel welds

    2. Static strength of joints

    • The ultimate strength of axially loaded CHS uniplanar T-joints subjected to axial chord load
    • Experimental study on overlapped CHS K-joints with hidden seam unwelded
    • Test results for RHS K-joints with 50% and 100% overlap
    • First practical implementation of the component method for joints in tubular construction
    • Local buckling behaviour of cold-formed RHS made from S1100
    • Study on effect of curved chords on behavior of welded circular hollow section joints

    3. Static strength of members/frames

    • Experimental and numerical studies of elliptical hollow sections under axial compression and bending
    • Cross-section classification of elliptical hollow sections
    • Finite element analysis of structural steel elliptical hollow sections in pure compression
    • Behaviour of hollow flange channel sections under concentrated loads
    • Analytical modelling of non-uniform deformation in thin-walled orthotropic tubes under
      pure bending
    • Three-dimensional second order analysis of scaffolds with semi-rigid connections
    • Prevention of disproportionate collapse of tubular framed construction by performance based specification of connectio

    4. Static strength of joints

    • Through-plate joints to elliptical and circular hollow sections
    • Evaluation of experimental results on slender RHS K-gap joints
    • Finite element analysis of slotted end tubular connections
    • Design of gusset-plate welded connections in structural steel hollow sections
    • Strength of slotted rectangular and square HSS tension connections
    • New ultimate strength formulae for CHS K joints
    • Tests of stainless steel RHS X-joints
    • Design and tests of cold-formed high strength stainless steel tubular sections subjected to web crippling

    B. Code development & applications

    • Hollow Structural Sections (HSS) in the 2005 AISC Specification
    • Field joints for tubulars – Some practical considerations
    • Building bridges with new materials – Footbridge over Bayerstrasse in Munich
    • Tubular structures in free-form architecture
    • Launchinga140 m span tubular truss bridge in Spain
    • Cost comparison of a tubular truss and a ring-stiffened shell structure for a wind turbine tower

    5. Composite construction

    • Nonlinear in-plane behaviour and buckling of concrete-filled steel tubular arches
    • Elastic buckling of thin circular tubes with an elastic infill under uniform compression
    • Rehabilitation of tubular members with carbon reinforced polymers
    • Numerical modeling of FRP-strengthened long HSS columns
    • Mechanical property of concrete filled CFRP-steel tube under uni-axial compression
    • Numerical analysis of concrete filled tubular beam-columns

    6. Fire

    • Fire protection of hollow structural sections with intumescent coatings – Case examples
    • Fire resistance of SCC filled square hollow structural steel sections
    • Numerical studies on HSC-filled steel columns exposed to fire
    • The behaviour of rotationally restrained concrete filled tubular columns in fire
    • Shear behavior of fin plates to tubular columns at ambient and elevated temperatures
    • Buckling of circular steel arches subjected to fire loading

    7. Composite construction

    • Experimental and analytical investigation of vanadium micro-alloyed concrete-filled tube-concrete footing connections
    • Axial capacity of concrete filled stainless steel circular columns
    • A numerical and experimental study of Concrete Filled Tubular (CFT) columns with high strength concrete

    8. Cast steel

    • Connecting tubular structures with steel castings
    • Cast steel nodes in tubular construction – Canadian experience
    • Comparison between a cast steel joint and a welded circular hollow section joint

    9. Static strength of joints

    • Effect of chord loads on the strength of RHS uniplanar gap K-joints
    • A steel tubular column-shearhead system for concrete flat plates
    • A joints solution by laser cutting in the chords of CHS structures
    • Hollow flange channel bolted web side plate connection tests
    • Tests on welded connections made of high strength steel up to 1100 MPa
    • Elasto-plastic behavior of high-strength bolted friction joints for steel beam-to-diaphragm connections

    10. Fatigue & fracture

    • Selection of butt-welded connections for joints between tubulars and cast steel nodes under fatigue loading
    • Fatigue assessment of weld root failure of hollow section joints by structural and notch stress approaches
    • Assessment of risk of brittle fracture for beam-to-column connections with weld defects
    • Applicability of partial joint penetration groove welded joints to beam-to-RHS column connections and assessment of safety from brittle fracture
    • Crack surface under weld toe in square hollow section T-joints
    • J-integral assessmen to flow temperature fracture of a welded K-joint

    C. Seismic

    • Influence of connection design on the inelastic seismic response of HSS steel bracing members
    • Experimental study on behavior of tubular joints under cyclic loading
    • Concrete filled hollow sections under earthquake loading: Investigation and comparison of structural response
    • Low-cycle fatigue behavior of circular CFT columns
    • Seismic performance of Confined Concrete Filled Tubular (CCFT) columns
    • Proposition of multi-column pier system with high seismic performance using steel tubes for elevated bridges


    Dr. Jeff Packer is Professor of Civil Engineering at the University of Toronto, Canada. Since his appointment at the University of Toronto in 1980 he has undertaken research, development and consulting work on tubular steel structures. He has published extensively on this topic, including several co-authored CIDECT Design Guide books.

    Dr. Silke Willibald is currently working as a Postdoctoral Fellow at the University of Toronto. She received both her diploma and doctoral degree at the University of Karlsruhe, Germany. During her studies and Postdoctoral Fellowship she has been working extensively in research on tubular structures.