Other designdetailing checks

Minimum area of reinforcement

Aamin = 0.26 (fctm / fyk) btd > 0.0013 btd <9.2.1.1>

§ The absolute maximum for vRdmax (and therefore the maximum value of vEd) would be 5.28 MPa when cot 0 would equal 1.0 and the variable strut angle would be at a maximum of 45°. ** For determination of VRdmax see Section 4.3.10.

ft As maximum spacing of links is 294 mm, changing spacing of links would appear to be of limited benefit.

where bt = width of tension zone

Aamin = 0.26 x 0.30 x 300666 x 300 x 392 / 500 = 366 mm2 Curtailment main bars Bottom: curtail

75% main bars 0.081 from end support

= 480 mm say 450 mm from A 70% main bars 0.30/ - ^ = 1800 - 1.125 x 392

= 1359 mm say 1350 from A

Top: curtail

= 1341 mm say 1350 from B 65% main bars 0.30/ + al = 1800 + 441

= 2241 mm say 2250 from B

At supports

25% of As to be anchored at supports 25% of 894 mm2 = 223 mm2

Use min. 2 no. H12 (226 mm2) at supports A, B and C In accordance with SM DSC[21] detail MB1 lap U-ba rs tension lap with main steel. Tension lap = 780 mm (in C30/37 concrete, H12, 'poor' bond condition) < How to: Detailing>

<9.2.1.2.(1), 9.2.1.4(1) & NA 9.2.1.5(1)>

Tension Lap

Figure 4.4

Continuous rectangular beam: RC details

Figure 4.4

Continuous rectangular beam: RC details

0.666

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Responses

  • diana
    What is a 1.4 tension lap?
    7 years ago

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