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Homework answers / question archive / 1 Report of normal section performance test of flexural member 1
1 Report of normal section performance test of flexural member
1. The size, reinforcement, arrangement of measuring points, loading position
and material strength index of the test beam. (test beam size, reinforcement, measuring point arrangement,
Loading position and material strength index)
1.1 The size and reinforcement of the test beam are shown in Fig. 1.
The reinforcement is shown in Figure 1. )
Fig. 1 The size and reinforcement of the test beam
Fig.1 Dimensions and reinforcement diagram of test beam
1.2 The arrangement of dial gauge is shown in Fig. 2. Please measure the actual
positioning size of the test beam and mark it in Fig. 2. (test beam dial indicator, dial indicator layout
As shown in Figure 2, please measure the actual positioning size of the experimental beam and mark it in Figure 2)
Normal section of reinforced concrete beam
Reinforced Concrete Beam Front Section
Specifications (construction instructions):
(1) The concrete strength grade is C20 (the concrete strength grade is C20)
(2) The thickness of the cover of concrete is 15mm (the thickness of the cover of concrete is
15mm)
(3) The stirrups are round steel bars with a diameter of 4 mm (the stirrups are round steel bars with a diameter of 4 mm
of round bars)
(4) The longitudinal bar is a round steel bar with a diameter of 12 mm (the longitudinal bar is straight
12 mm diameter round bar)
2
Fig. 2 The layout of dial gauge of the test beam
Fig. 2 Layout diagram of dial indicator and dial indicator of test beam
1.3 The calculation diagram of the test beam is shown in Fig. 3. Please indicate the
corresponding dimensions in Fig. 3. (The calculation diagram of the test beam is shown in Fig. 3, please note
Specify the corresponding size. )
Fig. 3 Calculation diagram of test beam
Fig. 3 Calculation diagram of test beam
1.4Age of test beam (test beam age) 28 days;
1.5 Test beam size (test beam size)
width (width) b= mm; height (height) h= mm;
effective height (t effective height) h0= mm; thickness of cove (r protective layer) c= mm;
distance between the center of reinforcement and the outer edge of concrete
distance from the center to the outer edge of the concrete) a = mm;
1.6 Strength of materials
strength of concrete (concrete strength) = 22.3; strength of steel bar (reinforcement strength) = 320;
Dialgauge (percentage scale)
3
1.7 Longitudinal reinforced bar (longitudinal reinforced bar) diameter of steel bar (bar diameter) d = 12;
area of steel bar = ; reinforcement ratio of the section (section reinforcement ratio) = ;
1.8 Relationship between resistance strain gauge reading and load sensor conversion
Conversion relationship between resistance strain gauge readings and load cell
1KN~20.
2. Record and collate test results
2.1 Record and sort out the resistance strain gauge readings, dial gauge readings and
crack widths in the test process under all levels of load. Fill it out in Table 1 (. record and
The readings of resistance strain gauges, dial gauges and dial gauges under loads at all levels during the test and
Crack width, etc., are filled in Table 1. )
Table 1 The test data record
Table 1 Test data record form
serial
number
reading of load strain
gauge ( )
reading of the dial gauge
(*10-3
mm)
deflection
Df
(*10-2
mm)
maximum
crack width
D1 D2 D3 D4 D5 w (mm)
1
2
3
4
5
6
7
8
9
10
11
12
4
13
14
15
2.2According to the readings of resistance strain gauge, the load at all levels and the
bending moment of the mid-span section can be calculated and fill them out in Table
2. (Calculate loads at all levels and mid-span section bending moments based on the readings of the resistance strain gauges, and fill in Table 2.)
Table 2 Load at all levels and the bending moment at the mid-span
Table 2 Loads at all levels and mid-span bending moment
serial number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
reading of load
strain gauge
load (KN)
bending moment
2.3According to the reading of the dial meter, draw the average strain distribution
diagram of the test beam section before cracking, after cracking and before failure on
Fig. 5. (According to the dial gauge readings, draw the test beam section before cracking, after cracking and before failure on Figure 5 average strain distribution. )
Fig. 5Average strain distribution of pure bend section of test beam
Fig. 5. Average strain distribution diagram of the pure bending section of the test beam
2.4 Draw the curve of test beam according to the dial gauge
reading on Fig. 6. (Plot the test beam curve on Fig. 6 based on the dial indicator reading.)
Before cracking After cracking Before failure
5
Fig. 6 The curve of test beam
Figure 6 Test Beam Curve
2.5 Plot the crack distribution of the test beam in Fig. 7.
Made on Figure 7. )
Fig. 7 Crack distribution of test beam
Fig. 7 Distribution of cracks in the test beam
8
2 Report of inclined section performance test of flexural member
Performance test report of oblique section of flexural member
1. The size, reinforcement, arrangement of measuring points, loading position and material strength index of the test beam. (test beam size, reinforcement, measuring point arrangement,
Loading position and material strength index)
1.1 The size and reinforcement of the test beam are shown in Fig. 1.
The reinforcement is shown in Figure 1. )
Fig. 1 The size and reinforcement of the test beam
Fig.1 Dimensions and reinforcement diagram of test beam
1.2 The calculation diagram of the test beam is shown in Fig. 2. Please measure the actual positioning size of the test beam and mark it in Fig. 2. (The calculation diagram of the test beam is shown in Fig.
As shown in Figure 2, please measure the actual positioning size of the experimental beam and mark it in Figure 2. )
Inclined section of reinforced concrete beam
Reinforced Concrete Beam Inclined Section
Specifications (construction instructions):
(1) The concrete strength grade is C20 (the concrete strength grade is C20)
(2) The thickness of the cover of concrete is 15mm (the thickness of the cover of concrete is 15mm)
(3) The stirrups are round steel bars with a diameter of 4 mm (the stirrups are round steel bars with a diameter of 4 mm muscle)
(4) The longitudinal bar is a rebar with a diameter of 14 mm (the longitudinal bar is an l-thread steel)
(5) The erection bar is a round bar with a diameter of 6 mm (the erection bar is a circle with a diameter of 6 mm Rebar)
9
Fig. 2 Calculation diagram of test beam
Fig. 2 Calculation diagram of test beam
1.3Age of test beam (test beam age) 28 days;
1.4 Test beam size (test beam size)
width(width) b = mm;
height (height) h= mm;
effective height (effective height) h0= mm;
thickness of cover (protective layer) c = mm;
distance between the center of reinforcement and the outer edge of concrete (steel
The distance from the center of the tendon to the outer edge of the concrete) a = mm;
1.5 Strength of materials strength of concrete (concrete strength) = 22.4;strength of steel bar (reinforcement strength) = 520;
1.6 Longitudinal reinforced bar (longitudinal reinforced bar) diameter of steel bar (rebar diameter) d = 14; area of steel bar = ;reinforcement ratio of the section (section reinforcement ratio) = ;
1.7 Stirrup (stirrup) diameter of steel bar (bar diameter) d = 4;
area of steel bar (bar area) = ; strength of steel bar = 290
7. Relationship between resistance strain gauge reading and load sensor conversion
The conversion relationship between the reading of the resistance strain gauge and the load cell
10
1KN~20.
2. Record and collate test results
2.1 Record and sort out the resistance strain gauge readings, dial gauge readings and crack widths in the test process under all levels of load. Fill it out in Table 1 (. record and
Organize the readings of the resistance strain gauge, dial indicator and dial indicator under the loads of all levels in the test process and
Crack width, etc., are filled in Table 1. )
Table 1 The test data record
Table 1 Test data record form
Serial number reading of load strain
gauge ( ) load (KN) shear (KN) The test phenomenon
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
2.2 Plot the crack distribution of the test beam in Fig. 3. (Plot the crack distribution of the test beam
Made on Figure 3. )
11
Fig. 3 Crack distribution of test beam
Fig. 3 Distribution of cracks in the test beam
