Breakthrough of High Strength Steels in Construction Ilkka Sorsa, Ruukki Construction Stålbyggnadsdagen 23 oktober 2014
1
www.ruukki.com Ilkka Sorsa 27/10/2014
Benefits of HSS in vehicles are based on savings in life cycle costs (LCC) By using HSS in container during life time of container – 60 000 litres less fuel used – 160 t less emissions of CO2
19 000 GJ 1 496 t
Lifetime energy consumption and CO2 emissions
Energy consumption and CO2 emissions in production 73 GJ/4,6 t
* Tandem trailer, 150,000 km/a, lifetime 10 a
27 October 2014 | www.ruukki.com |
2
CO2 35 x Energy 27 x
2 000 GJ 160 t
Lifetime CO2 and energy savings in operation 9.6 %
Benefits of HSS in Steel Construction are based on savings in value chain Steel price and processing costs will guide the selection of steels Raw- material Processing Painting Logistic Erection
Weight and costs savings in order of 2040% and 10-20% respectively can be reached
to compensate the increased steel cost
market price EN 10025-6
market price EN 10149-2
R. Stroetmann: High Strength Steel for improvement of sustainability, EUROSTEEL 2011, Budapest, Hungary
3
27/10/2014
R. Stroetmann: High Strength Steel for improvement of sustainability, EUROSTEEL 2011, Budapest, Hungary
www.ruukki.com Ilkka Sorsa
In steel constructions costs have to be optimized Case study tubular girder truss of 30m span
130
Materials studied: CFRHS 350/350, 420/355 hybrid 550/550, 550/355 hybrid 700/700, 700/355 hybrid
prefabrication
125
Relative price
material costs
cutting
120 115
assembling
110
welding
105 100
painting
95
(transport)
90 S355MC
S420MC
S550MC
S700MC
(erection)
4
27/10/2014
www.ruukki.com Ilkka Sorsa
Cost optimization
Relative cost and weight of 30 m span truss when total costs are optimized 110,0 %
costs
105,0 %
mass 100,0 %
95,0 %
90,0 %
85,0 %
80,0 %
75,0 %
70,0 % S355/355
5
27/10/2014
S420/355
S550/355
S550/550
S700/355
S700/700
www.ruukki.com Ilkka Sorsa
Cost of 30 m span truss when total costs are optimized 2500 2300 2100 1900 1700
Material Processing Total
1500 1300 1100 900 700 500 S355/355
6
27/10/2014
S420/355
S550/350
www.ruukki.com Ilkka Sorsa
S550/550
S700/355
S700/700
Manufacturing costs of 30 m span truss when total costs are optimized 400
350
S355/355 S420/355 S550/350 S550/550 S700/355 S700/700
300
250
200
150
100
50
0 Blasting
7
27/10/2014
Painting
Welding
Sawing
Jig
Tacking
www.ruukki.com Ilkka Sorsa
Effective use of HSS calls for redesign of construction Effect of the joint type on truss welding cost
140% 130% 110% 100% 90% 80% 70% 60% 50% Chord S420MC Diagonals S355MC
8
27/10/2014
www.ruukki.com Ilkka Sorsa
diagonal chord
120%
Reference
• Reduction of the volumes of welded joints, e.g. joint type (see picture), bolted joints,… • Introduction of low energy welding technologies, e.g. low energy MAG, laser welding,… • Introduction of laser and plasma technologies, e.g. in cutting • Redesign of manufacturing procedures, e.g. welding sequences • Increasing automation in processing, e.g. mechanized welding, robotics,..
Chord S700MC Diagonals S700MC
Chord S700MC Diagonals S355MC
Will HSS make a breakthrough in Steel Construction? Steel market size in construction sector in EU 27 and CIS countries
Evolution drivers: new HSS production technologies and products improved HSS design knowledge and tools improved processing technologies of HSS availability of HSS
Value chain costs play the key role in evolution but other factors like environmental footprint and improved architectural appearance can’t be underestimated. 9
27/10/2014
www.ruukki.com Ilkka Sorsa
Research and promotion is needed Despite of its necessity the evolution takes time because of need for updating standards responding to the latest research results, introduction of factual evidence of benefits and assurance of the availability of HSS
Research
Technical support
Marketing
Sales
10
27/10/2014
• Deep cooperation within stakeholders
• Design tools and guides
• Promotion of HHS successful cases
• Secure the availability from several steel suppliers
more studies are required for validation of the results of HSS and to renew codes new generation manufacturing technologies have to be adopted in steel construction workshops design and processing guidelines and their training is needed successful case stories are needed to show benefits of HSS availability of HSS from several steel suppliers has to be assured
www.ruukki.com Ilkka Sorsa
THANK YOU FOR YOUR ATTENTION! prefabrication e.g. blasting
materials
cutting
erection
assembling
355 HSS
transport
welding
painting
11
27/10/2014
www.ruukki.com Ilkka Sorsa
12
27/10/2014
www.ruukki.com Ilkka Sorsa
