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Frame structure refers to a structure composed of beams and columns connected by steel bars to form a load-bearing system, that is, a frame composed of beams and columns to jointly resist horizontal and vertical loads during use. The frame structure of the house wall is not load-bearing, but only plays the role of enclosure and separation. Generally, prefabricated aerated concrete, expanded perlite, hollow brick or porous brick, pumice, vermiculite, ceramsite and other lightweight boards are used for masonry or assembly. made.

frame building

The frame structure is also called the frame structure. The frame of the house is divided into single-span and multi-span according to the number of spans; according to the number of floors, it is divided into single-storey and multi-storey; according to the composition of the facade, it is divided into symmetrical and asymmetrical; Frame or steel and reinforced concrete mixed frame, etc. Among them, the most commonly used are concrete frames (cast-in-place, prefabricated, integrally assembled, and prestressing can also be applied as needed, mainly to beams or slabs) and steel frames. Prefabricated and assembled monolithic concrete frames and steel frames are suitable for large-scale industrial construction, with higher efficiency and better engineering quality.

The main advantages of frame buildings: flexible space separation, light weight, and material saving; it has the advantage of being able to flexibly match the layout of the building, which is conducive to arranging building structures that require larger space; the beam and column components of the frame structure are easy to standardize and shape. , it is convenient to use the assembled integral structure to shorten the construction period; when the cast-in-place concrete frame is used, the integrity and rigidity of the structure are better, and the design and treatment can also achieve a better seismic effect, and the beams or columns can be cast into various the desired cross-sectional shape.

The disadvantages of the frame structure system are: the stress concentration of the frame nodes is significant; the lateral stiffness of the frame structure is small, and it is a flexible structural frame. Under the action of strong earthquake, the horizontal displacement of the structure is large, which is easy to cause serious non-structural damage. The number of times is large, the joint workload is large, the procedures are many, and the labor is wasted. The construction is greatly affected by the season and the environment; it is not suitable for the construction of super high-rise buildings. The frame is a rod structure composed of beams and columns, and its bearing capacity and stiffness are low. Especially in the horizontal direction (even if the cast-in-place floor and beams can be considered to work together to improve the horizontal stiffness of the floor, it is limited), its force characteristics are similar to the vertical cantilever shear beam, and its overall horizontal displacement is large. The lower part is small, but compared with each floor, the inter-story deformation is small in the upper part and the lower part is large. How to improve the lateral stiffness of the frame and control the lateral movement of the structure are important factors in the design. For reinforced concrete frames, when the height is large and the number of layers is equal For a long time, not only the axial force of the columns at the bottom of the structure is large, but also the bending moment and the overall lateral displacement of the beams and columns caused by the horizontal load also increase significantly, which leads to the increase of the cross-sectional size and reinforcement. , it may bring difficulties and affect the rational use of building space. It is slightly higher in terms of material consumption and cost, so it is generally suitable for building houses with no more than 15 floors. It is recommended to use frame shear wall structure for super high buildings.