Eight-meter Solar LED Stream Pole Strength Calculation

The following explanation is determined according to GB50135-2006 "Tower Structural Design Specification". Known Conditions are calculated in maximum wind speed V = 36m / s, 12 typhoon. Solar LED Street Light Bar Material Q235 Wait Stress [σ] = 225000kn / m2.

Solar LED street lamp lever shape size 8m, light pole height h = 8m, wall thicknessδ5, upper mouth diameter D = 60, lower mouth diameter D = 165 . The upper part of the light pole is in the upper arm length size is l = 1.3M lamp bottom plate flange 420 ×420 .

Solar LED street lamp foundation size, foundation profile 0.6m×0.6m, buried depth 1.5m, ground bolt hole distance 320 ×320 , the bolt diameter M24 is four.

Solar LED street light pole strength calculation: standard wind pressure calculation, basic wind pressure is W0 = 0.8kN / m2 by wind speed 36m / s, the standard wind pressure W = W0·KT = 0.8×1.1 = 0.88kn / m2. The wind pressure adjustment coefficient KT takes 1.1.

The wind calculation of the solar LED street lamp holder stroke light headμS, conical rod body 8.7 wind pressure high speed change coefficientμZ, take 0.9, the light pole is in the wind area S rod = 1.06m2, the street lamp is in the wind area S light = 0.3m2, the light rod is affected by the wind F rod = W·μYes·μexist·S rod = 0.588KN, the lamp head is affected by wind F light = W·μYes·μexist·S light = 0.166kn

The total bending moment of the solar LED street lamp lever is calculated, the light pole bending moment M rod = f·H / 2 = 1.176KN·m, the lamp head to the bending moment of the pole, M light = F light·H = 1.328KN·M total bending moment,σM = M rod M lamp = 2.504 kN·No

Solar LED street light pole bending modulus calculation. WZ =πD 4—D4 / d = 3.14×(0.1654-0.1554) / 32/0.165=0.0000976m3.

Calculation of solar LED street light pole bending stress. Bending stressσσ=σM / W0 = 25661.8kn / m2σσ

As seen from the above calculations, the strength of the solar LED street light pole is sufficient. The geodial bolt intensity check, the wind direction is the diagonal, the tension of the terrain bolt is the maximum N =σM×Y /σY²= 2.504×0.327 / 0.327²2×0.1²= 6045KN, safety factor k take 2.5 floor bolts M24 effective cross-sectional area, s = 314 ², Q235 steel yield limit,σS = 235n / ², Licensed pull N =σYes×S / K = 235×314 / 2.5 = 295KN> n = 645KN, and the ternary bolts are more than four M24.

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