Comprehensive high -rise buildings related information and examples of high rod lamp design. The shape of the light rod is better, and it can also be made into a positive 12 -bond. The wind resistance coefficient of the cylinder rod body is about 0.7, the wind resistance coefficient of the 12 ridges is 0.96, and the cylinder shape with the same cross -sectional area of the rod body is the smallest of the wind resistance coefficient compared with the bonding rod body of any border. However, the 12 -bonding rod body is suitable for a complete set of light rods, which eliminates the welding combination between the lights of each section, but it also increases the actual total length of the overall light pole (30m high rod lamp to make three sections into three sections. Light rods and two sockets, actual growth rod body is 1.5 to 2.0m), which not only increases the cost, but also increases the load of the roots, which is beneficial and disadvantages.

In the overall design of the light rod, the scientific wind load should be calculated. Refer to the fixed high rod lights of the high rod lamp, the underwriting force of the wind load, the wind load bending moment at the roots of each light pole, the resistance, stress at the roots of the pole, and the upper and lower end of each section The outer diameter, wall thickness and basic carrying situation involve the stability of the entire high rod lamp, the slope of the overall light rod, and the safety factor of the rod body steel.

General requirements:

(1) The center of gravity of the entire high rod lamp on the ground is less than the radius of the bottom plate at the bottom plate of the light rod at the roots of the light rod at the wind load.

(2) The overall slope of the light rod TGα is between 0. 0055 ～ 0. 007, that is, 0. 0055 ≤ TGα≤ 0. 007. The larger the self -weight of the lamp, the closer the value of the TGα value;

(3) The safety factor β of each section of the light rod steel. In principle, the safety factor β 1 of the bottom lamp rod is not less than 1.64, and the safety coefficient value of the steel rod steel in each section is β 4> β3> β2> β1> 1. 64.

       From the relevant high -rod light information held by the author, the design of some high rod lights in China seems to pay attention to increasing the wall thickness of the rod body, but ignores the rationality of TGα. Some wall thickness is reasonable, and the value of TGα is small, manifested as the outer diameter of the pole is small. These issues are questionable. The wall thickness is too large, the self -weight of the pole body increases, which is not economical, the pressure on the base is also increased, and the additional bending moment brought by the rod body's disturbance when the wind load is affected by the wind load. Increasing, it is bound to increase the axial tension of the basic embedded bolt. There are many unfavorable use of the production, installation, basic construction and safe use of the light rod; the TGα value is small, the outer diameter of the rod must be small, the degree of self -weight stability of the entire high rod lamp, the resistance of the rod root section, etc. The situation of the series will inevitably have an impact, and it may also be hidden.

      The author designed 30M high rod lamps, the design maximum wind speed is 33.5m /s; the basic wind pressure ω 0 = 0.7014kn /m2; the light disk self -weight G 0 ≤ 750kg; The wall thickness of the rod is 5, 6, and 8mm, respectively. TGα = 0. 0058, 350mm of poles, and the steel type of the pole body ② ②, the safety factor at the root of each section is 3.1, 1.94, 1.68, respectively. The practice indicates that it is ideal. If this high rod lamp is required to withstand the maximum wind speed of 36m /s, the diameter and weight of the lamp dish, the upper and lower end diameter of the lamp rod are unchanged, the wall thickness of the three sections of lamps needs to be taken separately, respectively. 6, 8 and 10mm, the safety factor of the steel at the roots of the pole is 1.64; while the design of the wind resistance is 45m /s, the condition of the lamp dish is not changed, and the wall thickness of the high rod lights is still 6, 8, and 10mm. The model of steel is still the same. To ensure that the safety factor of the steel at the root of the rod is greater than 1.64, the value of the TGα must be adjusted again and increases the outer diameter at the root of the rod. From this we can see that in different regions and different wind resistance requirements, even if the high rod lamp with the same height and the same light disk, the overall light rod is slope, the wall thickness of each section, and the upper and lower end of the light pole and the lower end of the light pole and the lower end and lower end of the light pole and the lower end and lower end. The outer diameter is not necessarily the same. Here, we might as well calculate the 30M high rod light provided by some high -rod light manufacturers, 350mm diameter of the upper tip; 650mm in the diameter of the lower pole;