What is the difference between a beam and a diaphragm? What is a beam? Is it a diaphragm?

The beam is divided into an end beam and a middle beam, which is erected on the fulcrum of the pier of each bridge. The diaphragm is located in the middle of each span, not on the support.

First, the nature is different.

transverse partitions. Properties: Members set between beams to maintain the cross-section shape and enhance the lateral stiffness.

2. Beam nature: perpendicular to.

Stringers. beams along the building.

Minor shaft. Orientation arrangement.

Second, the characteristics are different.

1. Characteristics of diaphragm: distributed on the bridge.

Live load. Work.

Cast-in-place concrete.

Transverse partitions are often used for prefabrication.

Prestressed concrete.

T-beams. The transverse partition located at the end of the bridge is called the end partition, and the transverse partition located in the middle is called the middle partition.

2. Characteristics of beams: beams, columns and shelves form a group of shelves. Commonly found in:

Lightweight shelves. Medium-sized shelves.

And. Heavy-duty shelves.

The beam is mainly composed of two parts: the main body.

and columns. Card (pendant).

Extended information: Curved incision of diaphragm.

Base metal. The wheel load stress is mainly for the membrane.

Compressive stress. "Wheel load.

Stress amplitude. Diaphragm base metal that consumes pressure cycles.

Fatigue life. Repeated out-of-plane deformation eventually leads to it.

Fatigue cracking. The inference is related to "diaphragm welded with U-rib or it."

Thermal processing. Keep away from the arc incision.

Near the starting point of the U-rib caused a large remnant.

Tensile stress. Thus the compressive cycle of the wheel load stress becomes the actual tensile cycle.

Fatigue destruction. Corollary, which is more in line with reality needs to be further studied. The thickness of the diaphragm is thin, the out-of-plane deformation stress amplitude is small, and the fatigue of the base metal at the arc cut of the diaphragm does not consider the influence of the membrane compressive stress amplitude, and the conclusion is only that the out-of-plane repeated deformation is unconvincing.

Encyclopedia. Crossbeam.

The diaphragm refers to the position of the expansion joint or the position of the pier top connection section, which is called the end beam and the middle beam respectively.

The diaphragm generally refers to the T beam, and there is a transverse partition at a certain distance in the middle of the T beam, which is the transverse partition.

The so-called beam is a transverse beam, that is, a beam perpendicular to the longitudinal beam, arranged along the direction of the short axis of the building.

Diaphragm usually refers to the transverse connection of the prefabricated beam plate in the bridge to strengthen the transverse connection and enhance the integrity of the bridge superstructure.

So strictly speaking, the two are not exactly the same thing, the meaning of the word beam is broader, and it should be barely reasonable to say that the diaphragm is also a kind of beam.

In house construction, beams are beams that are parallel to the wall.

Because the walls at the end of ancient Chinese houses are in the shape of mountains, they are called gables, and the name of gables has been used until now. Although it is no longer the shape of a mountain, the end of the house and the wall parallel to the end are called gables. Gables are mostly load-bearing walls.

Since most of the houses in ancient China were long in shape, the walls in the short direction were gables, and the long walls were called longitudinal walls, that is, the walls perpendicular to the gables were longitudinal walls. The name of the longitudinal wall has also been used to this day. Longitudinal walls are mostly non-load-bearing walls.

There are also those that call the longitudinal wall as a wall.

In contrast to the longitudinal wall, the gable is also called a transverse wall.

When it comes to beams, beams that are parallel to the wall are often called beams.

The diaphragm refers to the position of the expansion joint or the position of the connecting section at the top of the pier, which is called the end beam and the middle cross beam respectively, and the transverse diaphragm generally refers to the T beam, and there is a transverse partition at a certain distance in the middle of the T beam, which is the transverse diaphragm.

Transverse diaphragm introductionThe structure that connects two prefabricated beam ribs is called diaphragm. The diaphragm is a component set in the bridge to maintain the shape of the cross-section and enhance the transverse stiffness. In the construction of railway bridges, in order to ensure the integrity of the bridge superstructure, it is necessary to set up diaphragms at the support and cantilever ends, and according to the span size of the bridge.

A certain number of inter-beam diaphragms are arranged between the spans. This approach is adopted in the general bridge construction in China, which is also in line with the provisions of China's "Highway Reinforced Concrete and Prestressed Concrete Bridge and Culvert Design Code". However, there are many problems in the construction of bridge diaphragm, such as the longitudinal cracks of wing plate joints that are easy to appear in bridge construction.

Cracks also appeared in the ribs of the main beam; The transverse rigidity of the bridge span structure is also reduced, resulting in the safety of the whole bridge, so we should pay attention to the disease of the diaphragm of the bridge in railway construction, and prevent and remediate. 2. The setting of the diaphragm is different for different bridge structures.

The transverse diaphragm of a straight girder bridge is preferably a T-shaped girder bridge. In this regard, Tongji University has done an experiment, the reinforced concrete simply supported bridge composed of 5 T-shaped main beams is a scale of 1 20 plexiglass model experiment, the experiment proves that the straight beam bridge is the most effective to use T-shaped diaphragm, and the diaphragm plays a role in maintaining the lateral stability of the bridge in the open section girder bridge such as T-shaped beam.

Ensure that each main beam is connected with each other to form a whole, which improves the torsional stiffness of this kind of beam body, and also makes the main beam connect into a whole in the horizontal direction, and is convenient to bear the horizontal load of transverse. In curved bridges, the requirements for diaphragms are even higher due to the interaction of bending and torsion. For curved bridges, whether it is an open section or a box-shaped cross-section beam.

After setting up a certain number of diaphragm trousers to ensure the transverse connection of beam body, the bending stress and winding of beam body will basically be stable, if there is not enough transverse support, the deformation of curve beam cross section is very large, so the setting of diaphragm should be established on the basis of warping stress. It is not only necessary to count the number of diaphragms.

And the internal forces are also calculated.

The beam is divided into an end beam and a middle beam, which is erected on the fulcrum of the pier of each bridge. The diaphragm is located in the middle of each span, not on the support.

Beams are beams that are erected on the roof and are load-bearing members;

The diaphragm is not load-bearing, but only plays the role of separating the partition;

The T beam diaphragm pin plate is a concrete beam structure used to increase the stiffness in the T beam, and is generally not used in the box girder, and the diaphragm is generally used on the T beam with a span greater than 20 meters.

The bridge deck at the junction between the plate and the bridge deck is stressed under the most unfavorable loading conditions. The tensile stress (hot spot stress), the compressive stress on the bottom surface, and the most unfavorable stress on the top and bottom surfaces of each scheme are obtained by linear extrapolation of the welding toe position of the bridge deck at the junction of the diaphragm and the bridge deck according to the above method.

The main tensile stress on the top surface of the bridge deck at the junction between the diaphragm and the bridge deck of each scheme is basically unchanged, and the main compressive stress on the bottom surface increases to a certain extent, but the stress values are very small. Aashto: Class C fatigue rating in 2010 and Chinese code requirements.

When the beam is connected with the column, the beam length is calculated to the side of the column, and when the main beam is connected with the secondary beam, the secondary beam length is calculated to the side of the main beam.

When the ring beam is connected to the beam, the volume of the ring beam should be deducted from the volume of the beam protruding into the ring beam.

When the concrete eaves protruded at the ring beam part, the protruding part is within 300px, and it is incorporated into the ring beam volume for calculation; When the protruding part is outside 300px, the outer skin of the ring beam is the boundary, and the extruded part is the eaves gutter.

Precast concrete beams are calculated by volume according to the dimensions shown in the design drawing. The volume occupied by the steel bars and embedded iron parts in the component is not deducted.

First, the nature is different.

1. Diaphragm properties: components set between beams in order to maintain the cross-sectional shape and enhance the transverse stiffness.

2. Beam nature: the beam perpendicular to the longitudinal beam is arranged along the direction of the short axis of the building.

Second, the characteristics are different.

1. Characteristics of the diaphragm: it plays a role in the live load distributed on the bridge. Cast-in-place concrete diaphragms are commonly used for precast prestressed concrete T-beams. The diaphragm located at the end of the bridge is called the end bulky partition, and the diaphragm located in the middle is called the middle partition.

2. Characteristics of beams: beams, columns and shelves form a group of shelves. It is commonly found in light, medium, and heavy-duty shelves. The beam is mainly composed of two parts: the main body and the column card (pendant).