Three-way loading mechanical property test system of multifunctional lining segment joint
A technology for lining segment and test system, applied in the direction of using stable shear force to test material strength, using stable bending force to test material strength, scientific instruments, etc., can solve the problem of shear stiffness and bending moment transfer coefficient. Carry out problems such as test measurement, complex test loading system, and large volume of prototype whole-loop test to achieve the effect of improving work efficiency and data accuracy
Active Publication Date: 2012-02-29
TONGJI UNIV
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Problems solved by technology
As far as we know, the test of the mechanical properties of joints is mainly to obtain the bending stiffness of the longitudinal joint, so the test equipment can only apply axial force and bending moment
And the test framework is relatively simple, and the loading control system is relatively low-level
In addition, the test of mechanical properties of this kind of joint cannot be used to test the shear stiffness and moment transfer coefficient between segment rings in the case of staggered assembly.
The full-ring test can measure the deformation and internal force of the segment ring under the design load, and can also test the interaction between the segment rings under the condition of staggered joint assembly. However, due to the large volume of the prototype full-ring test, The test loading system is relatively complex and can easily cause errors, so the test results of some key design parameters are often unreasonable
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[0041] Such as Figure 1 to Figure 3 Shown, test system of the present invention mainly comprises following six parts:
[0042] 1. The self-balancing frame subsystem mainly includes the main frame 1 and the connecting beam 2 that constitute the balanced frame structure. The main frame 1 includes two frame top beams 101, two frame bottom beams 102, two left frame columns 103 and two The right frame column 104, two connecting beams 2 are arranged between the two left frame columns 103, and two connecting beams 2 are arranged between the two right frame columns 104;
[0043] 2. The loading subsystem mainly includes the X-direction loading subsystem, the Y-direction loading subsystem, and the Z-direction loading subsystem, wherein: the X-direction loading subsystem mainly includes the X-direction loading actuator 11 and the X-direction loading right reaction beam 1001. The left reaction beam 1002 is loaded in the X direction, and the two ends of the right reaction beam 1001 are r...
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The invention provides a three-way loading mechanical property test system of a multifunctional lining segment joint, which mainly comprises a self-balancing frame sub-system, a loading sub-system, a test-piece support sub-system, a test-piece transporting sub-system, a loading control sub-system and a data acquisition sub-system. The loading sub-system adopts a modular design and can finish a shield tunneling lining segment inter-ring shearing test, a bending moment transferring test, a longitudinal joint corner rigidity test, a longitudinal joint radial shearing test and the like by different combinations. The system of the invention can preferably imitate three-way stress states of the shield tunneling lining segment joint in actual conditions and can finish various different loading modes to obtain mechanical parameters of the shield tunneling lining segment joint and mechanical properties of other similar structures.
Description
technical field [0001] The invention relates to a test device, in particular to a device for performing a mechanical performance test on a shield tunnel lining segment joint. Background technique [0002] As a special underground structure, the shield tunnel has the following characteristics compared with the above-ground structure and other underground structures when studying its mechanical properties: 1) There is interaction between the shield tunnel and the surrounding soil, so the shield tunnel The stress on the lining segment is relatively complex and the loads received at different stages and positions are different; 2) The actual load acting on the lining segment of the shield tunnel is simplified to the longitudinal force and the axial force and bending moment along the ring direction. Therefore, the actual 3) The shield tunnel lining adopts the segment assembly method, and the segment joint structure is relatively complex, so its mechanical properties are relativel...
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IPC IPC(8): G01N3/00G01N3/20G01N3/24G01N3/02
Inventor 闫治国丁文其朱合华顾赟黄锋彭益成陈宝常岐沈碧伟
Owner TONGJI UNIV