How to calculate the column concentrated force

1. The load transferred from the floor is transferred to the beam
the load of the beam is transferred to the column
according to one-way slab or two-way slab, the dead load and live load are combined and distributed to the beam according to the coefficient.

2. There are limitations in manual calculation, so it is impossible to carry out spatial collaborative calculation for frame structure. Therefore, for relatively simple and regular frame structure, plane frame calculation is often carried out only for the transverse frame (main stress direction) which plays a controlling role, and out of plane frame calculation is no longer carried out, That is to say, it is assumed that the moment of the beam column joint is balanced outside the plane, and only the vertical force is transferred. The vertical force adopts the fixed end beam at both ends of the single span, and the reaction force of the beam support is calculated and superimposed on the transverse frame joint. Thus, from the perspective of spatial system of frame structure, the error of manual calculation is great. I'm sorry, because it's not easy to explain your two questions separately. I kneaded them together according to my thinking, but the organization is not very clear, and I don't know if this explanation can be made clear.

3. Do you want to know the horizontal concentrated force on the column or the axial force on the column? If the axial force is natural, according to the sum of the constant live load transmitted by the beam and slab that the column bears, that is, all the loads within the loading area of the column, including all floors from top to bottom, the live load can be reced according to the number of floors, referring to the load specification.

4. There is no punctuation in your sentence "how to calculate the concentrated load of the middle column of the top column of the two-way slab", which is difficult for ordinary people to understand. According to my understanding, is it:

(there is a building, the top floor is a two-way slab, I want to know how to calculate the concentrated load of the top (in the structure) column and the middle (intermediate) column of the two-way slab? If it is such a question, it will be easy for people to answer you

the middle column bears the "all" load from the slab structure in the range of each adjacent span and "1 / 2 of each range" from the adjacent span column.

5.

For frame shear wall structure, if the overturning moment borne by the frame part is greater than 50% of the total overturning moment under the action of basic mode earthquake, the seismic grade of the frame part should be determined according to the frame structure, and the limit value of column axial compression ratio should be adopted according to the frame structure

The moment is the cross proct of the vector diameter of the action point of the reference point and the force, which has nothing to do with the shape of the rod. According to this, we can connect OP, calculate the length, and calculate the angle between OP and force according to the geometric relationship. The force moment is that the force multiplied by OP multiplied by the angle, which is sinusoidal. The direction is judged according to the right-hand rule

extended data:

the moment of a force on an axis is a physical quantity to measure the rotation effect of a force on an object around the axis. It is defined as the projection of the moment M of force F to o point on any axis oz passing through o point, which is called the moment of force F to Oz axis, expressed by MZ, MZ = MCOs β，β It is the angle between the vector m and the positive direction of the oz axis, and it is stipulated that the positive direction of the object rotation and the positive direction of the oz axis satisfy the right-handed spiral relationship.

MZ is an algebraic quantity, whose positive and negative represent the rotation tendency of the object, MZ & gt; 0 means that the force F makes the rotation tendency of the object consistent with the positive rotation direction, MZ & lt; 0, on the contrary. It must be pointed out that the moments of force F to different points on the oz axis are different, but the projections of these moments on the oz axis are equal

6. According to the plane layout, the rectangular guide load of one-way slab means that half of the slab load is transferred to the beam with the long side
two-way slab: Trapezoidal guide load in the long direction and triangular guide load in the short direction

7. The way you look at the picture is not right
the load of the slab is transferred to the beam first, and then to the column
if you look at a slab, it is divided into four regions, and the load of each region is the only beam transferred to this region
the load of the beam is then transferred to the column connected to the beam
is that clear?

8. The strip foundation has a large rigidity, so the foundation reaction under it can be regarded as a straight line distribution. According to this, the maximum, minimum and average values of the reaction (expressed by pressure and stress) can be calculated. The specification has provisions on the maximum and average values. If the provisions are not met, the size of the strip foundation shall be adjusted. Until this is met. According to concentrated force as fulcrum (column), strip foundation as beam of floor, reaction force as line load, internal force of strip foundation section is calculated, and reinforcement is made accordingly
the above is the calculation of foundation bearing capacity of strip foundation under concentrated load and the design of strip foundation
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