Back calculation of axial force of concrete support by strain ga

1. According to the fact that the strain of reinforcement is equal to that of concrete support.

2.

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3. The calculation of axial force is the same. But the specific design calculation is different. In addition to calculating whether the compressive strength of steel support meets the requirements, it also needs to calculate whether the stability meets the requirements. Because of the large slenderness ratio of steel support, it may be unstable.

4. Generally, it is the sum of the compressive strength of the concrete axis multiplied by the cross-sectional area plus the compressive strength of the steel bar multiplied by the total cross-sectional area of the steel bar, and then multiplied by a stability factor

5. The axial force of concrete support is calculated according to the compression bearing capacity of normal section. There are relevant calculation regulations in the concrete structure design codes of relevant instries, which are generally the axial compressive strength of concrete multiplied by the cross-sectional area, the compressive strength of steel multiplied by the total cross-sectional area of steel, and then multiplied by a stability factor

the standard is included in code for design of concrete structures (GB 50010-2010). Generally, it is the sum of the compressive strength of the concrete axis multiplied by the cross-sectional area plus the compressive strength of the reinforcement multiplied by the total cross-sectional area of the reinforcement, and then multiplied by a stability factor.

6. How to connect the broken green line on the concrete support? My green line broke last week. Let's find a repairman to repair it.

7. The axial force of concrete support is calculated according to the compression bearing capacity of normal section. There are relevant calculation regulations in the concrete structure design codes of relevant instries, which are generally the axial compressive strength of concrete multiplied by the cross-sectional area, the compressive strength of steel multiplied by the total cross-sectional area of steel, and then multiplied by a stability factor. Hope to help you.

8. Embedded in the support

9. What should be paid attention to when using strain gauge for steel support< br />1)   The strain gauge should be installed before the prestressing force is applied, and the bracket should be fully cooled when the initial reading is measured; If the prestressing force has been applied, it must be noted in the report that the data of support axial force reflects the change of force after the prestressing force of steel support is applied< br />2)   After the mounting bracket is welded on the steel support surface, push the strain gauge in a stable and free state without bending or torsion; The installation of mounting bracket and strain gauge shall be parallel to the support axis; The frequency of strain gauge should be controlled reasonably when tightening the screw; The installation position of strain gauge should be selected at the position suitable for protection.

10. The calculation of axial force of concrete support and steel support is the same, there is no big difference. It's just that the weight of the member is slightly different.