Structure and method for strengthening shear resistance of hollow plate by additionally arranging circumferential reinforcements
A technology for strengthening structures and hollow slabs, which is applied in bridge reinforcement, erection/assembly of bridges, bridge maintenance, etc. It can solve problems such as labor-intensive, social resource waste, and time-consuming, and achieve the effect of shortening the construction period and saving project cost
Pending Publication Date: 2019-02-01
LIAONING PROVINCIAL TRANSPORTATION PLANNING & DESIGN INST +1
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Problems solved by technology
If these hollow slab bridges are demolished and rebuilt, it will be labor-intensive, time-consuming, and expensive, resulting in a huge waste of social resources and greatly affecting regional economic development
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[0016] Such as Figure 1-4 As shown, in order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. A shear reinforcement structure for hollow slabs with additional hoop reinforcement, including hollow slab girders, hinged joints are arranged between every two adjacent hollow slab girders, and the technical points are: stirrups are arranged in the hinged joints, and at the same time Horizontal and longitudinal steel bars are arranged in the ring direction of the hollow slab beam to form a ring reinforcement grid; holes are drilled on the top and bottom of the hollow slab beam, and short steel bars of a certain length are implanted with adhesive to make the newly poured reinforced concrete reinforcement layer Combined with the original main beam.
[0017] The added stirrups 3 in the hinged joints are in the form of double-leg stirrups. The length of the straight par...
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The invention discloses a structure and a method for strengthening shear resistance of a hollow plate by additionally arranging circumferential reinforcements. By sufficiently using the spacesof hingejoints of the hollow plate, hooped reinforcementsare additionally arranged in the hinge joints; transverse and longitudinal reinforcements are additionally arranged in the circumferential direction of the hollow plate to form a reinforcement grid; the shear resistance of the hinge joints can be improved by using the hooped reinforcements; new additionally arranged transverse and longitudinal force-bearing reinforcements can be fixed; and finally, concrete is poured to the circumferential direction of the hollow plate to form a reinforcement concrete reinforcing layer. According to the methodfor strengthening the shear resistance of the hollow plate by additionally arranging the circumferential reinforcements, the anti-shear bearing capacity of a bridge can be improved by 30-50%, the engineering cost of the method is saved by 40-50% when compared with the reconstruction cost, the construction period is greatly shortened, and higher technical, economic and social benefits are realized.
Description
technical field [0001] The invention relates to the technical field of bridge engineering maintenance and reinforcement, and more specifically relates to a structure and method for shear reinforcement of hollow slabs by adding circumferential ribs. Background technique [0002] As a commonly used structural form in the design of small and medium-sized bridges in my country, prefabricated prestressed concrete hollow slab bridges have the characteristics of simple structure, economical materials, convenient construction, fast construction speed, standardization, and factory prefabricated components. Road bridge under construction. With the increase of the service life, the hollow slab bridges built in the early stage mainly caused many structural diseases, such as hinge cracks and slab bottom cracks, mainly due to design, construction, and heavy-load traffic. Hollow slab bridges have a large number and a large number of bases, and are widely used in various throats and arterie...
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IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 张冠华郭卫民王佳伟吴宪锴贾艳敏韩基刚刘心亮
Owner LIAONING PROVINCIAL TRANSPORTATION PLANNING & DESIGN INST