Size Effect: What Is Its Rationale and Penalty for Neglect
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Bibliographic Details
| Author(s): |
Zdeněk Bažant
Qiang Yu |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008 | ||||
| Published in: | IABSE Congress Chicago 2008 | ||||
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| Page(s): | 236-237 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2008 | ||||
| DOI: | 10.2749/222137908796292416 | ||||
| Abstract: |
Concrete is a typical quasi-brittle material, which inevitably exhibits size effect on the nominal structural strength. This study is focussed on the size effect in shear failure of reinforce concrete beams. By statistical analysis it is shown that if the size effect is ignored, the failure frequency (or probability) of large reinforced beams under shear may typically increase by three orders of magnitude. By computer simulations based on fracture mechanics it is further shown that shear reinforcement cannot eliminate the size effect in large reinforced concrete beams. |
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| Keywords: |
size effect structural safety design codes reinforced concrete shear failure fracture statistical analysis legal risk
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