-
Anonymous users2024-02-12Calculation formula: There is no specific calculation formula, only analysis and calculation according to the actual situation. The horizontal tension acting on the top of the corbel refers to the force borne by the tie rod formed by the horizontal and longitudinal stressed steel bar at the top.
The stress characteristics of the corbel (short cantilever) can be described by a simple truss model consisting of a tie rod formed by the horizontal and longitudinal stressed steel bar at the top and a concrete diagonal rod within the corbel. The vertical load will be borne by the horizontal tie rod tension and the diagonal rod pressure; The horizontal tension acting outward on the top of the corbel is borne by the horizontal tie rod. Because the corbel is required not to appear parallel to the oblique crack in the direction of the diagonal rod due to the greater pressure of the diagonal rod, the cross-sectional size of the corbel is usually conditioned by not appearing oblique crack, that is, controlled by this formula, and the coefficient in the formula considers the different anti-cracking requirements of different use conditions for corbel.
The configuration of horizontal stirrups in the corbel, especially in the upper part of the corbel, can effectively reduce the possibility of premature oblique cracks in this part. It is a traditional practice in China's engineering community to set up a certain number of bent steel bars in the corbel. However, the test showed that it had no significant effect on improving the shear bearing capacity of the corbel and reducing the possibility of oblique cracking.
The revised specification decided to retain the practice of arranging bent steel bars according to structure in the corbel, but moderately reduced the number of bent steel bars.
-
Anonymous users2024-02-11According to the calculation rules of concrete column engineering quantity, the corbel on the column is attached and incorporated into the column volume for calculation.
-
Anonymous users2024-02-10Hello, glad to answer for you. According to the formula, 550mm 850mm preliminary height = C30FC= 4 pieces with a diameter of 20 areas are selected to meet! = as 2 = = as 2 = to the basic structure of the range between the draft cover of the basic construction provisions:
The bevel angle of the bottom surface of the corbel + the design value of the tensile strength of the steel bar fy = 300n mm, the distance from the resultant point of the longitudinal reinforcement to the near side as=the minimum reinforcement ratio pmin=max[, the area of the compression surface on the top surface of the corbel requires the length of the comma from the concentrated load action point to the lower end of the hypotenuse of the corbel i = bent steel bar key, which should be located in the upper part of the corbel 1 6 to 1 2 The end height of the corbel h1 >= h 3, and not less than 200mm fvks * (hk f vk) * f tk * b * h 0 (the diameter of the stirrups should be 6 12mm, the spacing should be 100 150mm, and the total cross-sectional area of the horizontal stirrups within the upper 2ho 3 = range should not be less than half of the cross-sectional area of the tensile reinforcement bearing the vertical force when a ho, it is advisable to set up the reinforcement meter that the transverse compression length of the bent steel bar must be 2 corbels.
The apparent density of concrete is the "mass per unit volume" of the concrete mixture after tamping, measured in kg m 3. The main points of the method are as follows: >>>More
This thing is actually not very clear, if you are a Chinese, you can say that it was invented in our country--- during the Qin Shi Huang period, the Chinese people used glutinous rice juice and sand soil to build the Great Wall, in fact, it is also a kind of concrete! >>>More
In real life, this reinforced concrete sleeper is still very useful, and the role is also very large, and some advantages and disadvantages of this reinforced concrete sleeper will be introduced below. In addition to saving a lot of high-quality steel, concrete sleepers also have the advantages of long service life, good track stability, and can meet the requirements of high speed and large volume. It has played a great role in promoting seamless lines. >>>More
The full name of the concrete wall is the concrete impermeable wall, the longitudinal cut of the vertical wall, and the wall is extended along the dam body. It is a wall-shaped anti-seepage building built by continuously making holes in a loose and permeable foundation, fixing the wall with mud, and pouring concrete into the holes. It is a hydraulic work on ZD sluice dams and so on. >>>More
Rebar is a material and does not have a seismic rating.
Division. GB50011-20106 Code for Seismic Design of Buildings >>>More