Can the fixed supports of two spans of adjacent simply supported beams be installed on the same pier

Probably not... One end is fixed with a movable support at the other end.

Summary. Kiss, yes, the columns at both ends are used to fix the beam span, and they are also resistant to longitudinal deformation. The principle is:

A connection is formed between the beam and the column, the force of the beam causes the column to exert pressure, and the force of the column causes the beam to produce a tensile force, thus canceling each other out so that the beam span remains the same.

The single-span beam and the columns at both ends are fixed together and cast in situ at the same time, and the two ends are fixed supports.

Dear, yes, the pillars at both ends of the big brother field are used to fix the beam dust cultivation span, and they can also resist longitudinal deformation. The principle is: a connection is formed between the rolling beam and the column, the force of the beam makes the column produce pressure, and the force of the column causes the beam to produce tension, thus canceling each other and keeping the beam span unchanged.

Sidestep the question. The question I have to ask is: Are the ends of the beam a fixed support? Or any other form of support?

Okay, kiss, here is the answer for you.

The two ends of the beam can belong to the lead lifting fixed bearing, or it can belong to other support forms, such as sliding bearing, fulcrum bearing, etc. The exact situation depends on the requirements of the structure, such as the flexibility of the required beams, the complexity of the design, etc.

The fixed support can ensure that the beam does not move in a specific direction, while other support forms can ensure that the beam can move in a certain direction. Depending on the characteristics and needs of the structure, it is necessary to decide which supports to use.

Dear, I'm sorry that you still haven't made it clear what I'm asking. I mainly confirm that the beam and column I mentioned above are fixed as a stressed whole at the same time, and the column burial supports at both ends of the beam are one of the four support methods of the bridge scattering shelter? To make it easier for me to confirm the value of the calculated span of the beam.

Please ask the teacher to guide Minzhou!

Dear, I'm sorry for the time. In general, the beam and column are fixed as a stressed whole at the same time, and the column supports at both ends of the beam are cantilever supports (cantilever). The definition of this type of support is:

Cantilever support refers to the suspension of one end of the beam, and the other end is supported by the support, and does not pass through the support of the column, and the span of the cantilever support is the span of the beam.

Kiss! Hello, happy to answer your <>

The continuous beam of the pro-continuous beam with one span at the continuous place should be two supports, that is, there is a void at each end. The continuous beam is a static and indefinite structure, and the internal force in the combustion can be solved by the force method, and the beam with three or more supports is often encountered in the construction project, and the beam with three or more supports is called the continuous beam. Due to the load of the negative bending moment of the fulcrum, the positive bending moment in the span of the continuous beam is greatly reduced, so that the area of the bending moment diagram is reduced, and the span capacity is increased (because the design of the continuous beam is based on the sum of the absolute values of the maximum positive and negative bending moments on the cross-section, that is, the bending moment change amplitude as the standard).

Continuous beam structure, large stiffness, small deformation, good dynamic performance. A continuous beam is a structural system, and a box girder is one of the various cross-section types of the main beam of the structure, and the two are not parallel concepts. For example, a continuous beam can have a box girder section or a T-beam cross-section.

Hope mine can help you <>

Do you have any other questions?

For the sloping and good tomb bridge span structure, it is easy to arrange the fixed land bearing on the pier platform of the elevation.

Continuous beam bridges with two or more spans belong to the super-static system. Under the action of constant live load, the fulcrum negative bending moment generated by the continuous beam has the effect of unloading the positive bending moment in the span, so that the internal force state is relatively uniform and reasonable, so the beam height can be reduced, thereby the clearance under the bridge can be increased, the material is saved, and the stiffness is large, the integrity is good, the overload capacity is large, the purity of the socks is large, the expansion joints of the bridge deck are few, and because the bending moment of the middle section of the span is reduced, the bridge span can be increased.

Summary. Hello dear! The independent foundation short column can be used as the support of the foundation contact beam, and the independent foundation short column is a kind of pull beam and the foundation are poured together, in fact, this kind of foundation should be called a double-column joint foundation.

Independent foundation and foundation beam belong to the foundation part, and the general foundation part will include foundation beam independent foundation, strip foundation, pile foundation, etc.

Hello dear! The independent foundation short column can be used as the support of the foundation contact beam, and the independent foundation short column is a kind of pull beam and foundation pouring together, and the actual foundation should be called a double-column joint foundation. Independent foundation and foundation beam belong to the foundation part, and the general foundation part will contain the foundation beam, independent foundation, strip foundation, pile foundation, etc.

Calculate the anchorage length of the foundation contact beam, starting from the short column edge.

The short column is generally considered to be the ratio of the clear height of the column to the cross-sectional width of the column is less than four, h h<4. The column between the independent orange spike foundation and the two-layer structure of the Rangwu nucleus will be longer due to the relatively large burial depth, and a beam is often made below, so that the column is shorter, so as to be more economical. Thus the column is divided into two sections.

When the length of the bottom of the posture hand extending into the foundation is greater than the anchorage length, the bending length is greater than 6d and greater than 150mm; When the length of the tuba sticking into the bottom of the foundation is clear to the anchorage length, it should be bent for 15d.

When there are two rows of supports on the pier, what kind of beam can be the support beam on the pier.

The bridge pier is connected with the pier is a steel beam that is supported by the support of the main component bearing the bending moment and shear force, simply supported beam, continuous beam. The structure of the bridge, such as simply supported beams, continuous beams, cantilever beams and so on. There is also the force, and the force of various types of first elimination bridges is different.

calculation of loads, etc. During the construction process, the pile foundation, the pier body of the bearing cap, the vertical body of the beam, and the superstructure of the remaining socks of the beam are very important.

Generally, for the T-beam, 1 support is arranged at the lower end of each beam, and 2 supports are required for the T-beam.

For box girders and plate girders, 2 supports are arranged at the lower end of each beam, so the box girder may need 4 supports. If it is a simply supported girder bridge, how many pieces of girder there are, combined with the drawings or the above quantities to do multiplication. However, in the case of a continuous girder bridge, this is not the case.

Because the coupling involving the continuous beam contains the process of changing from the original simply supported beam to the continuous beam through the system transformation, that is: the construction of the wet joint and the tensioning of the negative bending moment form the continuous beam, then below the position of the wet joint is the common bearing of the original two-span beam. So the number must be less than that of the simple support shoot.

Question 1] A simply supported girder bridge, the width direction is a single box, a total of 12 spans, the cross section shows that there are 2 supports under the box girder, how many supports are there in total?

Answer: 12 4 = 48 (pcs).

Question 2] A continuous girder bridge, the width direction is a single box, the cross section shows that there are 2 supports under the box girder, and the bridge span is arranged in 4 couplets, each with 3 spans, how many supports are there in total?

Answer: 8 4 = 32 (pcs).

Since it is a simply supported beam, it is a stable structure (statically determined), so in fact, the member does not rotate.

When we calculate it, we consider that it rotates around a certain support, which is actually a calculation assumption. Let's assume that one support is removed, so that the member is no longer a stable structure, but can be rotated with another support in the late cavity. The removed support is replaced by a support reaction, which requires the entire member to remain in balance under the action of the load force and the support reaction, so that the magnitude of the support reaction can be calculated using the lever principle.

So, it's okay to rotate around any support, depending on how you want to calculate.

If you want to calculate the reaction force of a support, remove the A support and assume that the member rotates around the B support and vice versa.

In construction engineering, the calculation model of this structure is the standard simply supported beam;

The two ends of the physical object cannot be the same as those in the structural mechanics books (one end does not move the hinge, and the other end has a moving hinge), and the actual engineering everything and the object resistance are similar, and the limit error shall prevail, and the probability theory method is adopted, rather than the function theory method;

The large size of the bridge structure has the conditions to make a hinge bearing that is more similar to that in the structural mechanics books, and because of the large load, the group mu stool is also required to be closer to the theoretical value.