How to calculate the bottom force of the column in a one story w

1. 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.

2.

Calculation method of wood bearing capacity:

1. In situ test method: it is a method to determine the bearing capacity through direct field test. It includes (static) load test, static cone penetration test, standard penetration test, pressuremeter test and so on

Theoretical formula method: it is a method to determine the bearing capacity according to the theoretical formula calculated by the shear strength index of soil

Standard table method: according to the indoor test index, field test index or field identification index, the bearing capacity can be obtained by consulting the table listed in the specification. Different specifications (including specifications of different departments, instries and regions) will not have the same bearing capacity, so it is necessary to pay attention to their respective service conditions

Local experience method: it is a method to determine the bearing capacity by analogy based on the regional experience. It is a macro auxiliary method

extended data:

characteristics of wood bearing capacity:

1. Column pile: because the displacement of pile bottom is very small, it is not easy to give full play to pile side friction. For general column piles, the resistance at the bottom of the pile accounts for most of the bearing capacity of the pile, and the friction at the side of the pile is very small, which is often ignored. But when the pile is long and the overburden is thick, the elastic compression of the pile body is large enough to give full play to the pile side friction. For this kind of pile, it is suggested that the pile side friction can be calculated according to the existing domestic codes

2. Friction pile: when the bearing reaction of the soil layer at the bottom of the pile reaches the limit value, the displacement value is much larger than the pile side limit friction resistance. At this time, the pile side friction resistance is always brought into full play first, and then the pile bottom resistance is graally brought into play until it reaches the limit value

for friction piles with large pile length, e to the large compression deformation of the pile body, the reaction force at the bottom of the pile has not reached the limit value, the displacement at the top of the pile has exceeded the allowable range of the use requirements, and the load transferred to the bottom of the pile is very small

3. If we only talk about the self weight of the column itself, if the column is a 400mmx500mm square column with a floor height of 5.1m, then the self weight of the column = 0.4x0.5x25 (concrete unit weight) x5.2 (floor height), which is the self weight of one layer of a column
calculation of quantities of heavy steel steel column lattice column:
1. Calculate the weight of two steel columns beside according to the calculation rules of light steel column
2. Calculate the weight of connecting members (connecting members are generally angle steel) according to the actual net length between the webs of two steel columns * the theoretical weight of corresponding specifications
remarks:
1 When calculating the quantities of lattice columns, the quantities of relevant gusset plates shall be calculated according to the node details of the drawings (for example, the shape of gusset plate is irregular or polygonal, the steel plate shall be calculated according to its minimum external rectangular area * the theoretical weight of the specification), and the quantities shall be incorporated into the lattice columns
2. Pay attention to the second calculation when calculating the connecting members.

4.

Calculation method of clear height of frame column on the first floor

:
1. If there is foundation beam, the height from the surface of foundation beam to the bottom of beam on the first floor is the clear height of column

2. If there is no foundation beam, the first floor clear height algorithm is the first floor height + foundation layer height - foundation thickness - first floor beam height

calculation method of column clear height above the first floor column:

from the floor surface of this floor to the beam bottom of the upper floor, if there is no beam column, it is calculated to the bottom of the upper floor

5. Calculation of floor, beam, slab and column quantities of frame structure:
in the cast-in-place reinforced concrete frame structure, the column height should be calculated from the upper surface of column base to the floor or the top surface of column, and the column height between floors should be calculated from the floor level to the next floor level or the top surface of column, that is, the concrete quantities of the joint part of frame column and frame beam are incorporated into the frame column
the length of the frame beam is calculated according to the net length of the beam, and the height of the beam is calculated according to the full height from the bottom of the beam to the top of the beam, that is, the concrete quantity of the intersection part of the beam and the slab is included in the quantity of the beam
the quantity of slab is calculated in cubic meters by multiplying the net length of slab by the net width of slab by the thickness of slab
column height: column height of beam slab: height calculation from the upper surface of column base (or the upper surface of floor) to the upper surface of the upper floor. The height of non beam column from the upper surface of column base to the lower surface of column cap
beam length: when the beam is connected with the column, the beam length is calculated to the side of the column. When the main beam is connected with the secondary beam, the length of the secondary beam is calculated to the side of the main beam. The beam and slab shall be cast as a whole, and the beam height shall be calculated to the bottom of the slab.

6. Floor height + foundation buried depth, if it is a single foundation under the column, it can be estimated 500, the bottom column height is 4.2 + 0.5 = 4.7m, this is the estimation method

7. When pouring concrete, the inspection lot is calculated according to the pouring and tamping volume and time, not according to the components of beam column wall. You fill in the table is the main pouring and tamping time, pouring and tamping parts, in which * * axial intersection * * axial column, beam and slab can be filled. It is worth noting that if the concrete grade of column and slab is different, the inspection batch needs to be made separately.

8. There should be a basic floor with additional quota
for example, for a column with a floor height of 3.6, you only need to set column formwork, and you don't need ultra-high formwork, which should be considered according to the floor height, but whether some formwork heights are based on the floor height
there is only one scaffold, and there is no increase
unless your floor height & gt; 3.6. For example, if the height of one of the floors is 5 meters, then it will be increased here. The quota here will first cover the two subheads mentioned by me and you, and then add the increased subhead of 5 meters

9. If you only calculate the axial force of the column under static force, you can use the above method, but pay attention to the combination coefficient. If we calculate the axial force under wind or earthquake, we have to use the moment distribution.

10. The calculation method of longitudinal reinforcement is as follows: 1. Calculation of longitudinal reinforcement length of foundation column: anchorage length + story height required by the drawing at the bottom, story height + anchorage length at the top, and story height for the rest. The longitudinal reinforcement is calculated as one reinforcement lap for each layer
2. Stirrup: for the foundation column, according to the specification, the densification area is 1 / 2 column height, and the others are 1 / 3 column height
the length of stirrup is: l = 2x (beam height - 2x protective layer + beam width - 2x protective layer) + 2x11.9d + 8D.