Research On Mechanical Properties Of Bridge Piers Made Of Small Reinforced Concrete Hollow Bricks

In engineering, masonry structures made of small reinforced concrete hollow bricks are of excellent mechanical properties and energy saving property, which are widely used in the field of architecture. Meanwhile, such structures can be used in the construction of bridge piers for the purpose of energy saving, and the research on the application of such structures in bridge piers have some certain practical significance.Considering the general form of stress of piers in the actual projects as well as seismic action, the paper designed two groups of experiments. In the first group of experiments, the failure pattern, bearing capacity and deformation capacity of piers made of small reinforced concrete hollow bricks were studied under the action of large eccentric compression, considering the stress form under the piers’ weight and static loads; in the other group, the stress, deformation, deformation response, ductility and other properties of piers made of small reinforced concrete hollow bricks were studied under repeated quasi static loading, considering that most of the piers were destroyed in the earthquakes. Results show that piers made of small reinforced concrete hollow bricks is with good carrying capacity under the action of large eccentric compression. Most of the cracks emerge in the position with the most the mortar joints. The masonry bricks and the concrete filling in have a good adhesive strength and work performance, and the curved shape and deformation were similar to those of reinforced concrete under large eccentric compression. No brittle and partial destruction have occurred to the masonry components. The piers made of small reinforced concrete hollow bricks under repeatedly quasi static loading showed good hysteresis characteristics, reply deformation capacity and ductility, which are similar to the typical performances of reinforced concrete components and owns the seismic behavior not inferior than that of reinforced concrete. And the masonry structures have not completely lost their bearing capacity even with a relatively large deformation.By simulation using finite element software ABAQUS, the test results were verified. Referring to the relevant norms and research findings of others and combining with the test data, the constitutive relations of the model was calculated by using plastic damage of concrete to design the constitution of the masonry structure. The finite element model was established using integrated modeling method. Calculation results are in good agreement with the experimental results, indicating that the model was correct. By the convenience of finite element software, the stress situation which cannot be simulated in tests was simulated, and results show that the small reinforced concrete hollow bricks piers also owns good mechanical properties in actual stress situations.