The importance of structural balance

Designing and analyzing the structure of houses and buildings In order to build a house รับสร้างบ้านราชบุรี  a building, the first variable to know is the size, direction and location of the forces that come to the structure. and to make the structure that must be subjected to such force to be in equilibrium (equilibrium) is to have forces in opposite directions of the same magnitude. so that structural parts can be in balance or stationary equilibrium of the rigid layered structure It is necessary to obtain two conditions as follows:

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  • The sum of the forces acting on the vertical must be equal to zero.

ΣFx = 0 and the sum of the forces occurring in the horizontal dimension at (parallel to the page)

ΣFy = 0 and the sum resulting in the third dimension horizontal (perpendicular to the corner of the page) = 0

ΣFz = 0

ΣFx = 0; ΣFy = 0; ΣFz = 0

  • The sum of the moment points around any point is equal to ΣM = 0.
  • Newton’s 3rd law on the principle of action and reaction force states that when a force strikes an object In the object there will be a reaction against the said force of the same magnitude. but in the opposite direction in the same straight line to maintain the balance of the object at rest.
  • Force acting on a small area. or in the point where there is a support point below as was the case when the beams were placed on both sides of the head. and the pillars were laid on the foundation one more time.
  • When the beam supports the load in building construction บริษัทรับสร้างบ้าน or the load is spread throughout the length of the beam. with certification points on both heads which has the reaction force in the opposite direction to resist, such as in the case of weight from the area of ​​the load or wind
  • The free-body diagram shows various external and reaction forces. occurring in the structure to keep the structure balanced The diagram illustrates the components of a structure that must have its own balance. From small parts to the force acting from the area with stray loads. (furniture residents) to the larger supporting parts and must maintain its own balance as well. such as the next beam to the pillars and finally the foundation to maintain balance of the whole structureRead more about: F 95zone
  1. Pole

A pillar is a strong, slender structural piece. It is designed to support the axial compression of the column. Then transfer the force to the other end of the pole, however, the thin pole. (comparing the cross-sectional area with the length of the column) there is a chance of collapse. (or deflection) due to the deflection, although structural engineers have designed columns with an elevation ratio that does not exceed the specified standards Pillars may also collapse. Because the axial force exceeds the strength of the cross-sectional material of the column to be accepted. In addition, there are other types of forces such as eccentric force. (Not at the center of the column cross-section), which will cause additional moments. and unequal dispersion through the cross-section of the column as well

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  • Kern area is the area around the center of the column cross-section if compression is applied perpendicular to the column’s cross-section within the kerne area. Will cause a unit of compression throughout the cross-section of the column without any force unit, that is, if there is a compressive force acting outside the kerne region, which is very off-center, for example to the right of the kern area. A tensile unit will be formed on the left edge of the column cross-section.Visit here todayeduhub
  • If the pole is very steep. There will be a chance of collapse due to the buckling before the column collapses due to the force generated by the force of the column material itself, i.e. the buckling is a transverse imbalance condition. This is because the erected column is induced by axial compression before the column cross-sectional force reaches the yield point. which will bend in the lateral line Therefore, the higher the pole’s elevation ratio, the greater the chance of deflection. Therefore, the design must try to have the pillars

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  • low slack ratio or to have a gyration radius of the front of the pillar
  • The pole height ratio is The ratio between the column length (L) to the radius (/), therefore, a column with asymmetrical cross-section, such as a rectangle. which has unequal radius (/) on the x-axis and the y-axis. The bounce will occur on the narrower side.
  • Height is effective length. The distance between the two return curves in the post with the potential for deflection.
  • Efficacy length reduction factor due to elevation k is the coefficient used to determine the effective length. They are unequal depending on the pole end mounting conditions. For example, a tipped pole can cut the effective length to half. but can support up to four times more weight than non-attached poles
  • The external force creates a stronger unit within the column cross-section.
  • The gyration radius (r) is equal to the square root of the ratio between the inertia moment and the cross-sectional area of ​​the force.

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