Click image to view full size image
teel structure bridge (it rigid frame bridge), the main bearing structure adopt rigid frame Bridges.Beam and legs or pier (Taiwan) constitute a rigid connection, because of pier girder consolidation, beam and pier integral force, vertical pressure caused by not only bear the load on the beam piers, also take the bending moment and horizontal thrust.Structure can be divided into the door type rigid frame bridge, the slant leg rigid frame bridge, T rigid frame and continuous rigid frame bridge, the steel structure of the bridge girders generally all needs to inherit the positive and negative bending moments, cross section, appropriate USES box section continuous steel structure bridge girder and continuous beam basic same, cross section form and size and continuous beam are basically the same.
Portal rigid frame bridge
Its legs and vertical intersection beam portal structure, can be divided into single span structure, double cantilever sheet across the door structure, multiple gate bridge across different gate structure and three legs.The first three spanning capacity is not big, suitable for bridge crossing, require good geological conditions, the available steel and reinforced concrete structure building.Three spans two legs door structure bridge, on both ends with abutment, using prestressed concrete structure construction, spanning capacity can reach more than 200 meters.
Slant leg rigid frame bridge
Bridge pier is inclined to support the rigid frame bridge, legs and beam bending moment than greatly reduce the door type rigid frame bridge with long span, and the axial stress increases;Ditto bearing type arch bridge construction does not need to set the arch, compared the structure is simple.Bridge is beautiful, magnificent, spanning capacity is larger, apply to gorge bridge and highway bridge crossing, with steel and prestressed concrete structure construction.Such as ankang hanjiang river bridge (bridge), leg between toes Distance of 176 meters, was built in 1982.
T rigid frame bridge
Simply-supported prestressed bridge and long-span steel box girder bridge, on the basis of soil under the influence of cantilever construction.The upper structure of box girder and truss and truss arch, and pier consolidation T, bridge is beautiful, magnificent, light, apply to the balance of long-span cantilever construction, can not support across deep water rapids, to avoid disruption lower construction difficulties or shipping, also do not need system transformation, the construction is simple.
Continuous rigid frame bridge
Divide mainspan for multiple span rigid frame and continuous beam span continuous rigid frame bridge, adopt prestressed concrete structures, there are two or more main piers with pier beam consolidation, possesses the advantages of T rigid frame.But with the same kind bridge (such as continuous girder bridge, T rigid frame bridge) : keep the multi span rigid-frame bridge superstructure continuous beam properties, spanning capacity big, less construction difficulty, vehicle body, maintenance is simple, low cost, such as the multitude bridge in guangdong.Multi-span continuous - just structure bridge is set in the main span cross hinge, on both sides of the span of continuous system, can use the weight of the side span continuous beam make T made before long cantilever structure, in order to increase the span of the mainspan.
Portal rigid frame bridge
Its legs and vertical intersection beam portal structure, can be divided into single span structure, double cantilever sheet across the door structure, multiple gate bridge across different gate structure and three legs.The first three spanning capacity is not big, suitable for bridge crossing, require good geological conditions, the available steel and reinforced concrete structure building.Three spans two legs door structure bridge, on both ends with abutment, using prestressed concrete structure construction, spanning capacity can reach more than 200 meters.
Slant leg rigid frame bridge
Bridge pier is inclined to support the rigid frame bridge, legs and beam bending moment than greatly reduce the door type rigid frame bridge with long span, and the axial stress increases;Ditto bearing type arch bridge construction does not need to set the arch, compared the structure is simple.Bridge is beautiful, magnificent, spanning capacity is larger, apply to gorge bridge and highway bridge crossing, with steel and prestressed concrete structure construction.Such as ankang hanjiang river bridge (bridge), leg between toes Distance of 176 meters, was built in 1982.
T rigid frame bridge
Simply-supported prestressed bridge and long-span steel box girder bridge, on the basis of soil under the influence of cantilever construction.The upper structure of box girder and truss and truss arch, and pier consolidation T, bridge is beautiful, magnificent, light, apply to the balance of long-span cantilever construction, can not support across deep water rapids, to avoid disruption lower construction difficulties or shipping, also do not need system transformation, the construction is simple.
Continuous rigid frame bridge
Divide mainspan for multiple span rigid frame and continuous beam span continuous rigid frame bridge, adopt prestressed concrete structures, there are two or more main piers with pier beam consolidation, possesses the advantages of T rigid frame.But with the same kind bridge (such as continuous girder bridge, T rigid frame bridge) : keep the multi span rigid-frame bridge superstructure continuous beam properties, spanning capacity big, less construction difficulty, vehicle body, maintenance is simple, low cost, such as the multitude bridge in guangdong.Multi-span continuous - just structure bridge is set in the main span cross hinge, on both sides of the span of continuous system, can use the weight of the side span continuous beam make T made before long cantilever structure, in order to increase the span of the mainspan.