What is the function of a bowl shaped support
Basin type support is a widely used support device in engineering structures such as bridges and buildings, mainly serving the following functions:
1. Carrying vertical loads
Transmitting the weight of the upper structure: Basin bearings can transfer all vertical loads (including dead and live loads) from the upper structure of a bridge or building (such as bridge decks, floors, etc.) to th
Basin type support is a widely used support device in engineering structures such as bridges and buildings, mainly serving the following functions:
1. Carrying vertical loads
Transmitting the weight of the upper structure: Basin bearings can transfer all vertical loads (including dead and live loads) from the upper structure of a bridge or building (such as bridge decks, floors, etc.) to the lower structure (such as bridge piers, abutments, or foundations). For example, for a highway bridge, the weight of vehicles and the weight of the bridge itself are transmitted to the piers and abutments through bowl shaped supports. This load-bearing effect ensures the vertical stability of the structure, allowing the upper structure to be firmly placed on top of the lower supporting structure.
Adapting to different load conditions: Whether it is the long-term stable dead load such as the self weight of large buildings, or the dynamically changing live load such as vehicle travel on bridges, pot type supports can effectively bear it. And it can withstand huge vertical loads according to design requirements, and some large bridge bowl bearings can carry weights of thousands or even tens of thousands of tons.
2. Achieve horizontal displacement
Displacement caused by temperature changes: Due to changes in ambient temperature, the upper structure of bridges or buildings may experience thermal expansion and contraction. The bowl shaped support can allow the upper structure to produce a certain displacement in the horizontal direction to adapt to this thermal expansion and contraction. Taking a steel structure bridge as an example, during high temperatures in summer, the length of the bridge body will increase due to the thermal expansion of the steel. Basin shaped supports can allow the bridge body to freely extend in the horizontal direction; In winter, when the temperature is low, the bridge body shrinks, and the supports can also adapt to this change, thereby avoiding excessive temperature stress inside the structure and preventing structural damage.
Adapting to displacement under horizontal forces such as earthquakes: When natural disasters such as earthquakes occur, the ground will move horizontally, thereby applying horizontal forces to the upper structure of buildings or bridges. Basin type supports can allow horizontal displacement of the upper structure to a certain extent, playing a role in buffering and energy dissipation. For example, in an earthquake, the bowl shaped bearings of a bridge can dissipate some of the seismic energy through horizontal displacement, reducing the degree of damage to the overall structure of the bridge caused by the earthquake.
3. Provide rotation function
Adapting to the rotation caused by structural deformation: During the use of bridges or buildings, the upper structure may undergo certain rotations due to factors such as uneven settlement, uneven distribution of vehicle loads, and wind loads. The bowl shaped support can provide rotational function to adapt to this structural deformation. For example, in curved bridges, vehicles traveling at different positions can cause varying degrees of twisting of the bridge body. Basin type supports can allow the bridge body to rotate smoothly, ensuring the normal use of the bridge.
Ensure the reasonable distribution of internal forces in the structure: By providing rotational function, pot supports can achieve a reasonable distribution of internal forces (such as bending moment, torque, etc.) in the upper structure. This can avoid excessive concentration of internal forces in certain areas, thereby extending the service life of the structure. For example, in multi story buildings, the rotational function of bowl shaped supports can make the internal force transmission between floors more reasonable, preventing local components from being damaged prematurely due to excessive internal forces.
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