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BS EN 1992-1-2:2023

BS EN 1992-1-2:2023

$215.11

Eurocode 2. Design of concrete structures – Structural fire design

Published By Publication Date Number of Pages
BSI 2023 94
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1.1 Scope of prEN 1992 1 2 (1) This document deals with the design of concrete structures for the accidental situation of fire exposure and is intended to be used in conjunction with prEN 1992 1 1 and EN 1991 1 2. This document identifies differences from, or supplements to, normal temperature design. (2) This document applies to concrete structures required to fulfil a loadbearing function, separating function or both. (3) This document gives principles and application rules for the design of structures for specified requirements in respect of the aforementioned functions and the levels of performance. (4) This document applies to structures, or parts of structures, that are within the scope of prEN 1992 1 1 and are designed accordingly. (5) The methods given in this document are applicable to normal weight concrete up to strength class C100/115 and lightweight concrete up to strength class LC50/60. 1.2 Assumptions (1) In addition to the general assumptions of prEN 1990 the following assumptions apply: – the choice of the relevant design fire scenario is made by appropriate qualified and experienced personnel or is given by the relevant national regulation; – any fire protection measure taken into account in the design will be adequately maintained.

PDF Catalog

PDF Pages PDF Title
2 undefined
13 1 Scope
1.1 Scope of EN 199212
1.2 Assumptions
2 Normative references
14 3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
3.2.1 Latin upper case letters
16 3.2.2 Latin lower case letters
18 3.2.3 Greek lower case letters
20 3.2.4 Units
3.2.5 Sign conventions
21 4 Basis of design
4.1 General rules
4.2 Nominal fire exposure
22 4.3 Physically based fire exposure
4.4 Actions
4.5 Design values of material properties
4.6 Verification methods
23 4.7 Member analysis
4.8 Analysis of parts of the structure
24 4.9 Global structural analysis
4.10 Detailing
4.11 Spalling
4.12 Protective layers
25 5 Material properties
5.1 General
5.2 Concrete thermal properties
5.2.1 Emissivity coefficient
5.2.2 Thermal conductivity
5.2.3 Specific heat
27 5.2.4 Density
5.3 Mechanical properties
5.3.1 Concrete
5.3.1.1 Concrete under compression
29 5.3.1.2 Tensile strength
30 5.3.1.3 Thermal expansion
5.3.2 Reinforcing steel
5.3.2.1 Strength and deformation properties
32 5.3.2.2 Thermal expansion
5.3.3 Prestressing steel
5.3.3.1 Strength and deformation properties
33 5.3.3.2 Thermal expansion
34 6 Tabulated design data
6.1 General
35 6.2 General design rules
37 6.3 Columns
6.3.1 General
6.3.2 Method A
6.3.2.1 General
38 6.3.2.2 Columns exposed to fire on four sides
40 6.3.2.3 Columns exposed to fire on one side
41 6.3.3 Method B
6.4 Walls
6.4.1 Non load-bearing walls (partitions)
6.4.2 Load-bearing solid walls
43 6.5 Tensile members
6.6 Beams
6.6.1 General
45 6.6.2 Simply supported beams exposed to fire on one, two or three sides
46 6.6.3 Continuous beams exposed to fire on one, two or three sides
48 6.6.4 Beams exposed on all sides
6.7 Slabs
6.7.1 General
49 6.7.2 Simply supported slabs
50 6.7.3 Continuous solid slabs
6.7.4 Flat slabs
6.7.5 Ribbed slabs
53 7 Simplified design methods
7.1 General
7.2 Temperature profiles
7.2.1 General
7.2.2 Basic solution for one side exposure
55 7.2.3 Walls, slabs and rectangular cross-sections
57 7.2.4 Circular cross-sections
58 7.3 Structural analysis
7.3.1 General
7.3.2 Reduction of cross-section
60 7.3.3 Bending
7.3.3.1 General
61 7.3.3.2 Simplified verification
7.3.3.3 Refined verification
63 7.3.4 Bending and axial load
7.3.4.1 General
7.3.4.2 Simplified verification
66 7.3.4.3 Refined verification
67 7.3.5 Shear and torsion
7.3.5.1 General
7.3.5.2 Shear resistance of members dependant on concrete tensile strength
7.3.5.3 Shear resistance of members with shear reinforcement
68 7.3.5.4 Torsion resistance of members with shear reinforcement
70 8 Advanced design methods
8.1 General
8.2 Thermal analysis
8.3 Mechanical analysis
71 8.4 Validation of advanced design methods
72 9 Detailing
9.1 General
9.2 Detailing of reinforcing and prestressing steel
9.3 Detailing of members
73 9.4 Joints
74 9.5 Connections
9.6 Fire protection systems
75 10 Rules for spalling
77 Annex A (normative)Lightweight aggregate concrete structures
A.1 Use of this annex
A.2 Scope and field of application
A.3 Material properties
78 A.4 Tabulated design data
A.5 Rules for spalling
79 Annex B (informative)Steel fibre reinforced concrete structures
B.1 Use of this annex
B.2 Scope and field of application
B.3 Design rules
80 Annex C (informative)Recycled aggregates concrete structures
C.1 Use of this annex
C.2 Scope and field of application
C.3 Design rules
81 Annex D (normative)Buckling of columns under fire conditions
D.1 Use of this annex
D.2 Scope and field of application
89 Annex E (informative)Load-bearing solid walls — complementary tables
E.1 Use of this annex
E.2 Scope and field of application
E.3 Complementary tables

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BS EN 1992-1-2:2023
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