Architectural design and practice Phần 7 docx

... In Figs 10.6 and 10 .7, f v =0.35(1+ 17. 5?), a/d=6 and ␥ mv =2.0. For these conditions it is apparent that shear strength will be a limiting factor for steel ratios above 0.0 07 0.009 and 0.003–0.004 ... METHODS OF DESIGN Design against progressive collapse could be introduced in two ways: • Design against the occurrence of accidental damage. • Allow accidental damage to occur...

Ngày tải lên: 08/08/2014, 01:20

... elastic strain for brickwork and 3 times for concrete blockwork and these values should be used for the design in the absence of specific data. 11 .7. 6 Thermal effect In practice, materials of different ... load of 2kN/m and a characteristic live load of 3.5kN/m. The masonry characteristic strength f k =19.2N/mm 2 at transfer and service, and the unit weight of masonry is 21kN/...

Ngày tải lên: 08/08/2014, 01:20

... where is the design strength of the structure, and the design loading effects. Here ␥ m and ␥ f are partial safety factors; R k and Q k are characteristic values of resistance and load actions, ... bricks are also used, covered by BS 1 87 and BS 6 073 . Bricks of shapes other than rectangular prisms are referred to as ‘standard special’ and covered by BS 472 9. Concret...

Ngày tải lên: 08/08/2014, 01:20

... types of sand:sand type S and sand type G. Both types of sand will produce satisfactory mortars. However, the grading of sand type G, which falls between the lower limits of sand S and sand G, may ... 8110 may not be applicable. In order to compensate for this and for free flowing of the mix to fill the space and the void, a slump of 75 mm and 175 mm for concrete mix has been recom...

Ngày tải lên: 08/08/2014, 01:20

... built in brickwork and the other in blockwork. 4.2.3 Sections 3 and 4: design Sections 3 and 4 contain the main design information, starting with a statement of the basis of design. Unlike its ... materials, components and workmanship. In general, these should be in accordance with the relevant British Standard (e.g. BS 5628: Part 3; Materials and components, design and wor...

Ngày tải lên: 08/08/2014, 01:20

... M i and N i are respectively the design bending moment and vertical load at the top or bottom of the wall and e hi and e a are ©2004 Taylor & Francis where h is the clear storey height and ... principle of design can be expressed as design vertical loading р design vertical load resistance in which the term on the left-hand side is determined from the known applie...

Ngày tải lên: 08/08/2014, 01:20

... h=2650 mm and the clear span L 3 = 279 7.5 mm Taking e hi =0 and e a= h ef /450=1.988/450=0.004m equation (5.4) be- comes The design vertical stress at the junction is 2 07. 57/ 102.5 and since ... (W 1 )=1.4×105+1.6×19= 177 .4 kN/m Load from left (W 2 ) dead load only=1.4×4.1=5.7kN/m imposed load=5 .7+ 1.6×2.2=9.2 kN/m Load from right (W 3 ) dead load only=1.4×4.1=5.7kN/m...

Ngày tải lên: 08/08/2014, 01:20

... equation (7. 3) into equation (7. 5) (7. 6) Similarly, for a wall with two returns (Fig. 7. 5 (a)): (7. 7) (7. 8) From equation (7. 3) (7. 9) For various values of ␣ , the q 1 /q 0 and q 2 /q 0 ... triangles and one rectangle for simplification of the calculation) 7. 21) From equations (7. 20) and (7. 21), (7. 22) or Fig. 7. 9 Idealized fracture lines. ©2...

Ngày tải lên: 08/08/2014, 01:20

... load=3. 17 102.5×10 3 /10 3 =324.9kN/m. 12 .7. 1 Selection of brick and mortar combination for wall A: according to EC6 Design vertical load resistance of wall , where depends on eccentricity and slenderness ratio . 12 .7. 2 Calculation ... principle of design according to EC6, the wall A in the ground floor will be redesigned. The dead and live loading is taken as calculated before...

Ngày tải lên: 08/08/2014, 01:20

... Engineer, 49, October, 4 67 74 Stafford-Smith, B.S. and Riddington, J.R. (1 977 ) The composite behaviour of elastic wall- beam systems, Proc. Inst. Civ. Eng. (Part 2), 63, June, 377 –91 Wood, R.H. (1952) ... wall l e effective length or span M i design bending moment at top or bottom of a wall M m design bending moment at mid-height of a wall M RD design bending moment of a beam N i...

Ngày tải lên: 08/08/2014, 01:20