Counterforce loading frame for multifunctional self-balancing type continuous beam test

Abstract

The invention relates to a counterforce loading frame for a multifunctional self-balancing type continuous beam test. A longitudinal sliding groove is machined in the middle of the upper surface of a counterforce frame bottom plate. Electric hoisting devices, counterforce loading frame stand columns and distribution beam supports are arranged on the slide groove. Full threads are machined in the counterforce loading frame stand columns. Orientation wheels are arranged at the bottoms of the counterforce loading frame stand columns. Lower beams are arranged on the tops of the counterforce loading frame stand columns through screw thread fit. Middle beams and upper beams are fixedly arranged on beam stand columns through nuts. Test beams are arranged between the middle beams and the upper beams. Displacement monitoring device supports are arranged on the tops of the upper beams. Distribution beams are placed on the distribution beam supports. The two sides of the distribution beams are provided with rulers and slide grooves, wherein hooks are arranged on the slide grooves. Roller supports are located on the distribution beams. Jacks are arranged on the lower portions of the distribution beams. The counterforce loading frame is suitable for tests of continuous beams, simply supported beams and columnar components, and the span can be changed so that the counterforce loading frame can be used for components of different sizes.

Description

technical field [0001] The invention is a multi-functional self-balancing counter force loading frame for tests of continuous beams, simply supported beams, columns, etc., and belongs to the technical field of civil engineering test devices. Background technique [0002] In civil engineering tests, beam members are a type of test that often needs to be carried out. According to their mechanical characteristics, they can be divided into simply supported beams and continuous beams. At present, the experimental research on beam components mainly focuses on simply supported beams, while the research on continuous beams is relatively scarce. One of the important reasons is that simply supported beam tests are easy to operate and the test difficulty is low, while continuous beam tests using existing equipment However, it is more difficult, the preparation work before the test is complicated, the test accuracy is difficult to control, etc., and a relatively wide test site is requir...

AI Technical Summary

Problems solved by technology

At present, the experimental research on beam components mainly focuses on simply supported beams, while the research on continuous beams is relatively scarce. One of the important reasons is that simply supported beam tests are easy to operate and the test difficulty is low, while continuous beam tests using existing equipment It is very difficult, the preparation work before the test is complicated, the test accuracy is difficult to control, etc., and a relatively wide test site is required, and the force characteristics of continuous beams are different from simply supported beams, so it is also necessary to study them.

When a few scholars conduct experiments on continuous beams, they often use several reaction frames pre-buried in the concrete ground, place iron blocks on the ground as supports, and install loads between the test beam and the reaction frame beams. Sensors and jacks apply load to the beam for subsequent tests, but the size of the test beam depends on the distance between the fixed reaction frames, the test range is limited, and it is difficult to achieve simultaneous loading of multiple loading points during loading, which is likely to cause test errors , it is inconvenient to lean over and bow your head when observing and measuring cracks on the surface of components, and due to limited space, it is impossible to carry out tests in specific environments (such as constant temperature, freeze-thaw cycles, etc.), the whole test has certain difficulties and inconveniences

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