BS-8110-2-1985.pdf
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1、BRITISH STANDARD BS 8110-2: 1985 Reprinted, incorporating Amendments Nos. 1, 2 and 3 Structural use of concrete Part 2: Code of practice for special circumstances ICS 91.080.40 UDC 624.012.3/.4+691.3 ? Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:03:04 GMT
2、+00:00 2006, Uncontrolled Copy, (c) BSI BS 8110-2:1985 This British Standard, having been prepared under the direction of the Civil Engineering and Building Structures Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 August 1985 BSI 30 November 2
3、005 The following BSI references relate to the work on this standard: Committee reference CSB/39 Draft for comment 81/15604 DC ISBN 0 580 14490 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Civil Engineering and Building Structures S
4、tandards Committee (CSB/-) to Technical Committee CSB/39, upon which the following bodies were represented: Association of Consulting Engineers British Aggregate Construction Materials Industries British Precast Concrete Federation Ltd. British Railways Board British Ready Mixed Concrete Association
5、 British Reinforcement Manufacturers Association British Steel Industry Building Employers Confederation Cement Admixtures Association Cement and Concrete Association Cement Makers Federation Concrete Society Department of the Environment (Building Research Establishment) Department of the Environme
6、nt (Housing and Construction Industries) Department of the Environment (Property Services Agency) District Surveyors Association Federation of Civil Engineering Contractors Greater London Council Incorporated Association of Architects and Surveyors Institute of Clerks of Works of Great Britain Incor
7、porated Institution of Civil Engineers Institution of Municipal Engineers Institution of Structural Engineers Precast Flooring Federation Royal Institute of British Architects Sand and Gravel Association Limited Co-opted members Amendments issued since publication Amd. No.Date of issueComments 5914M
8、ay 1989 12061July 2001 1601730 November 2005Indicated by a sideline Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:03:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8110-2:1985 BSI 30 November 2005 i Contents Page Committees responsibleInside front cover F
9、orewordiv Section 1. General 1.1Scope1 1.2Definitions1 1.3Symbols1 Section 2. Methods of analysis for the ultimate limit state 2.1General3 2.2Design loads and strengths3 2.3Non-linear methods5 2.4Torsional resistance of beams5 2.5Effective column height9 2.6Robustness10 Section 3. Serviceability cal
10、culations 3.1General13 3.2Serviceability limit states13 3.3Loads14 3.4Analysis of structure for serviceability limit states15 3.5Material properties for the calculation of curvature and stresses15 3.6Calculation of curvatures15 3.7Calculation of deflection17 3.8Calculation of crack width20 Section 4
11、. Fire resistance 4.1General25 4.2Factors to be considered in determining fire resistance26 4.3Tabulated data (method 1)28 4.4Fire test (method 2)32 4.5Fire engineering calculations (method 3)32 Section 5. Additional considerations in the use of lightweight aggregate concrete 5.1General39 5.2Cover f
12、or durability and fire resistance39 5.3Characteristic strength of concrete40 5.4Shear resistance40 5.5Torsional resistance of beams40 5.6Deflections41 5.7Columns41 5.8Walls41 5.9Anchorage bond and laps41 5.10Bearing stress inside bends41 Licensed Copy: London South Bank University, London South Bank
13、 University, Fri Dec 08 06:03:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8110-2:1985 ii BSI 30 November 2005 Page Section 6. (deleted) Section 7. Elastic deformation, creep, drying shrinkage and thermal strains of concrete 7.1General45 7.2Elastic deformation45 7.3Creep46 7.4Drying shrinkage48
14、7.5Thermal strains49 Section 8. Movement joints 8.1General51 8.2Need for movement joints51 8.3Types of movement joint52 8.4Provision of joints52 8.5Design of joints52 Section 9. Appraisal and testing of structures and components during construction 9.1General53 9.2Purpose of testing53 9.3Basis of ap
15、proach53 9.4Check tests on structural concrete53 9.5Load tests of structures or parts of structures54 9.6Load tests on individual precast units55 Appendix A Bibliography57 Index58 Figure 2.1 Stress strain curve for rigorous analysis of non-critical sections6 Figure 3.1 Assumptions made in calculatin
16、g curvatures16 Figure 3.2 Deflection of a cantilever forming part of a framed structure20 Figure 4.1 Calculation of average cover29 Figure 4.2 Typical examples of beams, plain soffit floors and ribbed soffit floors30 Figure 4.3 Typical examples of reinforced concrete columns31 Figure 4.4 Design curv
17、es for variation of concrete strength with temperature37 Figure 4.5 Design curves for variation of steel strength or yield stress with temperature38 Figure 7.1 Effects of relative humidity, age of loading and section thickness upon creep factor47 Figure 7.2 Drying shrinkage of normal-weight concrete
18、48 Figure 7.3 Effect of dryness upon the coefficient of thermal expransion of hardened cement and concrete50 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:03:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8110-2:1985 BSI 30 November 2005 iii Page Table 2.
19、1 Minimum values of partial safety factors to be applied to worst credible values4 Table 2.2 Values of coefficient “7 Table 2.3 Values of vt,min and vtu8 Table 2.4 Reinforcement for shear and torsion8 Table 3.1 Values of K for various bending moment diagrams19 Table 3.2 Estimated limiting temperatur
20、e changes to avoid cracking22 Table 3.3 Values of external restraint recorded in various structures23 Table 4.1 Variation of cover to main reinforcement with member width32 Table 4.2 Reinforced concrete columns33 Table 4.3 Concrete beams34 Table 4.4 Plain soffit concrete floors34 Table 4.5 Ribbed op
21、en soffit concrete floors35 Table 4.6 Concrete walls with vertical reinforcement36 Table 5.1 deleted 39 Table 5.2 Nominal cover to all steel to meet specified periods of fire resistance (lightweight aggregate concrete)40 Table 5.3 Values of vc, design shear stress for strength class LC20/22 lightwei
22、ght concrete40 Table 7.1 Strength of concrete46 Table 7.2 Typical range for the static modulus of elasticity at 28 days of normal-weight concrete46 Table 7.3 Thermal expansion of rock group and related concrete49 Publications referred toInside back cover Licensed Copy: London South Bank University,
23、London South Bank University, Fri Dec 08 06:03:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8110-2:1985 iv BSI 30 November 2005 Foreword This part of BS 8110 has been prepared under the direction of the Civil Engineering and Building Structures Standards Committee. Together with BS 8110-1 it sup
24、ersedes CP 110-1:1972, which is withdrawn. BS 8110-1 gives recommendations for design and construction. These recommendations relate particularly to routine building construction which makes up the majority of structural applications; they are in the form of a statement of design objectives and limi
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