Find the engineering reinforcement, find the engineering quantity of the reinforcement, and find the

One minute to understand the calculation of the amount of steel bars teasing the work core He Cheng Shan's Kai.

Are you counting stirrups or main bars on a beam? If it is the main reinforcement, it is: the net length of the beam, minus the protective layer on both sides, plus the lap (one lap every eight meters) and the hook, the stirrup is: the outer perimeter divided by the interval, equal to its number.

Supplement the upstairs If the main reinforcement is calculated, the upper iron can not be lapped, the erection bar can be lapped with the pressure beam iron, 12d The main reinforcement must be welded or hooked, anchored into the middle support, the lower iron is empty, and the beam iron is broken, the length is 1 3 plus the column, the hook on both sides is anchored into the bearing, the middle is to take the 1 3 2 of the side with a large span on both sides, plus the column section, the two sides are the same, the middle support of the lower iron does not need to be hooked, and it can be directly anchored into the LA (LAE) When the two sides are not high, the high side of the beam is hooked, and the low side is the same straight anchor If you still don't understand, you can continue to ask questions.

Reinforcement engineering includes the processing of reinforcement and the binding and installation of reinforcement skeleton.

First, the process of steel bar processing.

The process of steel bar processing is: straightening and rust removal - blanking - joint - bending.

1.Blanking. The design length is the length of the axis, and the axis includes an elongated part when bending. When bent at 45°, the elongation is 1 2d; At 90° bending, the elongation is 1d; When bent at 180°, elongation. The rebar is cut using a rebar cutting machine.

When the diameter of the steel bar is less than 19mm, a manual cutting machine is used; When the diameter of the steel bar is 19 40mm, an electric cutting machine is adopted; If the diameter of the steel bar is greater than 40mm, the steel bar is cut by gas cutting.

Figure 13-5 Welded joints.

3.Curved. These include rebar forming bending and end hooks, the purpose of which is to increase the adhesion between steel bars and concrete.

Second, the binding of steel bars.

Binding reinforcement is usually done in the order of the side walls, arches and base plates. The position should be accurate and firm when binding. The lashing nodes are arranged in the shape of plum blossoms. The direction of the binding wires facing the two binding nodes should be in a figure-eight shape (Figure 13-6).

The reinforcement cannot be in direct contact with the formwork, and needs to be separated by prefabricated mortar cushion blocks to ensure the thickness of the protective layer (2cm).

Figure 13-6 Torx tieing.

Calculation formula for reinforcement engineering quantity:

Chapter 1 Beams.

Section 1 Frame beams.

1. Calculation of the first span reinforcement.

1. The upper part is through the rib.

The length of the upper through bar (upper through bar 1) The length of the net span of the through span The anchorage value of the first and last end supports.

2. Negative reinforcement of the end support.

The length of the negative reinforcement of the end support: the first row is the anchorage value of the ln 3 end support;

The second row is the anchorage value of the LN 4 end supports.

3. a lower steel bar.

The length of the lower reinforcement The net span length The anchorage value of the left and right supports.

Note: The result of the calculation of the lower reinforcement is the same regardless of whether it is arranged or not, so we can not enter the arrangement information when marking the lower longitudinal reinforcement of the beam.

The above three types of steel bars are involved in the support anchorage problem, so how to realize the judgment on the support anchorage in 03G101-1 in the software?

Now let's summarize the support anchorage judgment problems of the above three types of steel bars:

The width of the support is lae and , which is a straight anchor, and takes max.

The anchorage value of the end support of the reinforcement The width of the support lae or , is the bending anchor, take max.

The anchorage value of the intermediate support of the reinforcement is max

4. Waist tendons. Structural reinforcement: The length of the structural reinforcement is 2 15d

Torsional reinforcement: The algorithm is the same as that of through reinforcement.

5. Stretching. Length of ribs (beam width 2 protective layer) 2 seismic hook value) 2d

Number of tendons: If we don't give the spacing of the tendons in the flat input, then the number of tendons (stirrup root number 2) (construction rib root number 2); If the spacing of the ribs is given, then the number of roots of the ribs Length of the ribs and the spacing of the ribs.

6. Stirrups. Stirrup length (beam width 2 protective layer beam height - 2 protective layer) 2

Number of stirrups (length of the encrypting zone, spacing between the encrypting zones+1) 2 (length of the unencrypted zone, spacing between the unencrypted zones 1)+1

Note: Because when the member deducts the protective layer, it is deducted to the outer skin of the longitudinal bar, then, we can find that the diameter value of the tension bar and stirrup is deducted at each protective layer; And when we calculate the length of the rebar in the budget, we calculate it according to the skin.

Therefore, the software will automatically add the length of the extra deduction back, therefore, the reinforcement calculation adds 2D, stirrup calculation.

increased by 8d. (as shown in the image below).

7. Suspension bars. The length of the suspension bar is 2 * anchorage + 2 * the length of the inclined section + the width of the secondary beam + 2 * 50, of which the height of the frame beam is 800mm and the angle = 60°

800mm angle = 45°

Lapping of steel bars in the tension zone is not allowed (including welding); Due to the suspension of the project for 110 days, the cement should be tested after the resumption of work, if it is directly used in the engineering entity, if there is a quality accident, the construction unit should submit the material re-inspection certificate, there is obviously no material re-inspection certificate in this project, so the construction unit should bear the main responsibility; In response to the suspension of the project proposed by Party A, the construction unit shall submit a written claim to Party A in a timely manner, and list the relevant reasons for the lack of construction period and nest work.