63 / 2016-09-23 20:57:26

Structure Performance Testing of the Precast Layered Assembled Noise Barrier Pillar

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The precast pillar of the precast layered assembled noise barrier pillar is steel fiber reinforced concrete prefabricated components, but its structure performance is unknown. This paper presents testing the deflection change of the top and the strain on the bottom of the precast layered assembled noise barrier pillar under loads. The equivalent elastic modulus of the precast pillar and the precast layered assembled noise barrier pillar was obtained by processing the results. The following conclusions are obtained from the test results (1)when the load was less than 2 times of design load value, the precast pillar cylinder is in normal working condition, its equivalent elastic modulus increased with the increasing load; when the load was more than 2 times of design load value, cracks appear in the precast pillar cylinder, and its equivalent elastic modulus decreases with the increasing load.(2) In normal working condition, the equivalent elastic modulus of the precast pillar was more than 60GPa, when the precast pillar works with cracks, it was more than 45GPa. (3)The equivalent elastic modulus of the precast layered assembled noise barrier pillar decreased with the increasing load. After cracks appearing in the precast pillar, the decreasing trend of the equivalent elastic modulus was accelerated. (4)In normal working condition, the equivalent elastic modulus of the layered assembled precast noise barrier pillar was 64GPa and it was more than 34GPa when it broke.