Led display screen

The LED display structure optimization

3.1 column the structure improvement

Because of the concrete filled steel tube bending moment, concrete will pull out by work, lead to bending stiffness down dramatically. Now consider inside reinforced concrete filled steel tube in add, concrete and steel pipe by bend produced the nuisance interaction force, thus improve the pillar bending stiffness. In the concrete filled steel tube match for reinforced, taking into account the pillar by bending and axial force near lesser, can consider to not try to reduce the weight of pillar. The bending stiffness specific computation formula is as follows:

(6)

For 30 mm diameter steel, sectional area

For their heart shape steel shaft section of the x axis of inertia approximate calculation formula:

(xi for reinforced to shape heart shaft distance)

So with reinforced concrete filled steel tube bending stiffness for:

The results from calculation, it is known that the pillar bending stiffness stiffness improve nearly 20%, in the actual engineering construction, also can see the effect.

Figure 1 concrete-filled steel tube column section

3.2 the LED display structure optimization basis

The LED display structure foundation is an important part of the structure, it will bear the upper structure to inherit all the load transfer to safety foundation, and keep the structural stability role. To ensure that the LED display structure security and stability, the requirement to resist the LED display itself based pressure caused by the force of bending moment and pull out.

The LED display structure design in general use of the foundation under column independent extended basic, this structure way need concrete and steel reinforced amount is large, poor economic performance, it is necessary to form of foundation to improve. Figure 2 for improved the LED display basic elevation and plan. Foundation for the bottom 10 x 4 m, floor thick 130 cm, 1400 x 400 respectively rib beam cm, 1600 x 400 m, 1800 x 400 m 3 kinds. The biggest characteristic is to use foundation beam slab structure instead of conventional independent foundation vertebral concrete, concrete consumption reduced.

Figure 2-a advertising base elevation figure 2-b advertising base plan

Checking the foundation bearing capacity whether meet the requirements:

Type: G as the foundation self-respect standard; W as the foundation of the bottom resistance moment; P Max, P min load effect respectively standard combination edge maximum pressure value based and minimum pressure value; Load N = 1669.5 KN, M = 12857 KN,

G = 8960 KN, A = 140 m 2,. According to provide data calculation P Max = 115.3 KPa, P min = 36.57 KPa.

Due to the characteristic value of subgrade bearing capacity fa = 131.43 KPa, P Max = 115.3 KPa < 1.2 fa = 157.7 KPa and, therefore, the LED display to meet the requirements of the bearing capacity of the foundation.

Four, the conclusion

This article mainly from the structure of the knowledge of the mechanics of independent column LED display optimization analysis. The main conclusions are:

(1) for the independent column LED display the load analysis, obtained the size of wind load; Through the analysis of structure stability, and calculates the pillar bending stiffness value.

(3) of independent column LED display pillar and structure optimization basis, the optimal results relatively reasonable, from stress and economic indicators, than conventional base bigger superiority.

reference

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[2] LuHui, the academician sea. Round steel tube concrete bending stiffness calculation method is discussed. The industrial architecture, 2004

[3] GB50009-2001 building structure load regulating. China plans to press. 2001

[4] of the ministry of construction of the People's Republic. Building structure load specifications (GB50009-2001). In march of 2002

[5] HuangBenCai. Structure wind analysis principle and application. Tongji university press. 2001

[6] have the soup. The LED display wind design and measures are discussed. The building structures (30 aug.27. 2000