[Engineering Version] Daily Question 20180703

Principles for installing ring beams: (1) In brick-built houses, when the eaves height is between 5 and 8 meters, one ring beam should be installed at that elevation; if the eaves height is greater than 8 meters, more ring beams should be added. (2) In block and rubble masonry buildings, when the eaves height is 4–5 m, a ring beam should be installed at that elevation ； When the eaves height is greater than 5m, the number of installations should be increased. (3) In multi-story masonry residential buildings such as dormitories and office buildings, in addition to installing a ring beam at the eaves level, for prefabricated reinforced concrete floor slabs, a cast-in-place reinforced concrete ring beam can be installed on each floor. The functions of ring beams are: ① To enhance the overall stiffness and stability of the building ； ②Reduce the damage caused by uneven settlement of the foundation to buildings ； ③Resist the effects of seismic forces.

Principles for installing ring beams: (1) In brick-built houses, when the eaves height is between 5 and 8 meters, one ring beam should be installed at that elevation; if the eaves height is greater than 8 meters, more ring beams should be added. (2) In block and rubble masonry buildings, when the eaves height is 4–5 m, a ring beam should be installed at that elevation ； When the eaves height is greater than 5m, the number of installations should be increased. (3) In multi-story masonry residential buildings such as dormitories and office buildings, in addition to installing a ring beam at the eaves level, for prefabricated reinforced concrete floor slabs, a cast-in-place reinforced concrete ring beam can be installed on each floor. The functions of ring beams are: ① To enhance the overall stiffness and stability of the building ； ②Reduce the damage caused by uneven settlement of the foundation to buildings ； ③Resist the effects of seismic forces.

Principles for installing ring beams: (1) In brick-built houses, when the eaves height is between 5 and 8 meters, one ring beam should be installed at that elevation; if the eaves height is greater than 8 meters, more ring beams should be added. (2) In block and rubble masonry buildings, when the eaves height is 4–5 m, a ring beam should be installed at that elevation ； When the eaves height is greater than 5m, the number of installations should be increased. (3) In multi-story masonry residential buildings such as dormitories and office buildings, in addition to installing a ring beam at the eaves level, for prefabricated reinforced concrete floor slabs, a cast-in-place reinforced concrete ring beam can be installed on each floor. The functions of ring beams are: ① To enhance the overall stiffness and stability of the building ； ②Reduce the damage caused by uneven settlement of the foundation to buildings ； ③Resist the effects of seismic forces.

Installation: It is installed along the exterior walls and some interior walls; single-story buildings require at least one such beam, while multi-story buildings generally have one installed on each floor. In areas prone to earthquakes, ring beams are usually installed on every floor； Function: It enhances the overall stiffness and integrity of the building, acting as a kind of brace for it. Prevent uneven settlement of the foundation, vibration, and earthquakes.

I. Requirements for installation 1. For buildings subject to uneven foundation settlement or significant vibration loads, cast-in-place concrete ring beams can be installed in the masonry walls in accordance with the following provisions. 2. Open single-story buildings such as factories, warehouses, and canteens shall be provided with ring beams in accordance with the following provisions: (1) For buildings with brick masonry structures, when the eaves height is between 5 and 8 meters, a ring beam shall be installed at that eaves height ； When the eaves height is greater than 8m, the number of installations should be increased ； (2) For block and rubble masonry buildings with an eaves height of 4–5 m ； A ring beam should be installed ； When the eaves height is greater than 5m, the number of installations should be increased ； (3) For single-story industrial buildings equipped with cranes or large vibrating equipment, in addition to installing cast-in-place reinforced concrete ring beams at the eaves level or the top of the windows, an additional number of such beams should also be installed ； 3. For multi-story masonry civil buildings such as residential and office buildings with 3 to 4 floors, a ring beam should be installed at the eaves level ； When the number of floors exceeds 4, in addition to installing a ring beam at the ground floor and at the eaves level, at least one should be installed on every other floor along all longitudinal and transverse walls. Industrial buildings with multi-story masonry structures should be equipped with cast-in-place concrete ring beams on each floor. In multi-story masonry structures with wall beams, cast-in-place reinforced concrete ring beams should be installed at the level of the beam supports, the top surface of the wall beams, and the eaves height. Reinforced concrete ring beams or reinforced brick ring beams are typically installed in walls to prevent adverse effects on a building caused by uneven settlement of the foundation or significant vibration loads, thereby enhancing the overall stiffness of masonry structures. The number of ring beams should be determined based on the structure and construction of the building. II. Its function is to work in conjunction with floor slabs and structural columns to increase the overall stiffness and stability of the building, reduce the damage caused by uneven settlement of the foundation, and resist the effects of seismic forces. 1. Enhance the integrity and spatial stiffness of the building. 2. To prevent adverse effects on the building caused by uneven settlement of the foundation or large vibration loads. 3. Ring beams installed at the top surface of the foundation and at the eaves are most effective in resisting uneven settlement. 4. When the settlement in the middle of the building is greater than that at the ends, the ring beam located on the top surface of the foundation plays a more significant role ； When the settlement at both ends of a building is greater than that in the middle, the ring beam at the eaves plays a more significant role.

Principles for installing ring beams: (1) In brick-built houses, when the eaves height is between 5 and 8 meters, one ring beam should be installed at that elevation; if the eaves height is greater than 8 meters, more ring beams should be added. (2) In block and rubble masonry buildings, when the eaves height is 4–5 m, a ring beam should be installed at that elevation ； When the eaves height is greater than 5m, the number of installations should be increased. (3) In multi-story masonry residential buildings such as dormitories and office buildings, in addition to installing a ring beam at the eaves level, for prefabricated reinforced concrete floor slabs, a cast-in-place reinforced concrete ring beam can be installed on each floor. The functions of ring beams are: ① To enhance the overall stiffness and stability of the building ； ②Reduce the damage caused by uneven settlement of the foundation to buildings ； ③Resist the effects of seismic forces.

Principles for installing ring beams: (1) In brick-built houses, when the eaves height is between 5 and 8 meters, one ring beam should be installed at that elevation; if the eaves height is greater than 8 meters, more ring beams should be added. (2) In block and rubble masonry buildings, when the eaves height is 4–5 m, a ring beam should be installed at that elevation ； When the eaves height is greater than 5m, the number of installations should be increased. (3) In multi-story masonry residential buildings such as dormitories and office buildings, in addition to installing a ring beam at the eaves level, for prefabricated reinforced concrete floor slabs, a cast-in-place reinforced concrete ring beam can be installed on each floor. The functions of ring beams are: ① To enhance the overall stiffness and stability of the building ； ②Reduce the damage caused by uneven settlement of the foundation to buildings ； ③Resist the effects of seismic forces.

Principles for installing ring beams: (1) In brick-built houses, when the eaves height is between 5 and 8 meters, one ring beam should be installed at that elevation; if the eaves height is greater than 8 meters, more ring beams should be added. (2) In block and rubble masonry buildings, when the eaves height is 4–5 m, a ring beam should be installed at that elevation ； When the eaves height is greater than 5m, the number of installations should be increased. (3) In multi-story masonry residential buildings such as dormitories and office buildings, in addition to installing a ring beam at the eaves level, for prefabricated reinforced concrete floor slabs, a cast-in-place reinforced concrete ring beam can be installed on each floor. The function of the ring beam is to work together with the floor slabs and structural columns to increase the overall stiffness and stability of the building, reduce the damage caused by uneven settlement of the foundation, and resist the effects of seismic forces. 1. Enhance the integrity and spatial stiffness of the building. 2. To prevent adverse effects on the building caused by uneven settlement of the foundation or large vibration loads. 3. Ring beams installed at the top surface of the foundation and at the eaves are most effective in resisting uneven settlement. 4. When the settlement in the middle of the building is greater than that at the ends, the ring beam located on the top surface of the foundation plays a more significant role ； When the settlement at both ends of a building is greater than that in the middle, the ring beam at the eaves plays a more significant role.

In masonry structure buildings, closed reinforced concrete beams or ring beams are installed horizontally within the masonry to enhance the spatial stiffness of the building, improve its integrity, increase the shear and tensile strength of the brick and stone masonry, and prevent damage to the structure caused by uneven foundation settlement, earthquakes, or other significant vibration loads. The continuous reinforced concrete beam at the lower part of a building is called a foundation ring beam, or ground ring beam (DQL) ； At the upper part of the wall, the reinforced concrete beam adjacent to the floor slab is called the top ring beam. Since the ring beam is a continuously surrounding beam, it is called a ring beam. Functions: 1. Enhance the integrity and spatial stiffness of the building. 2. To prevent adverse effects on the building caused by uneven settlement of the foundation or large vibration loads. 3. Ring beams installed at the top surface of the foundation and at the eaves are most effective in resisting uneven settlement. 4. When the settlement in the middle of the building is greater than that at the ends, the ring beam located on the top surface of the foundation plays a more significant role ； When the settlement at both ends of a building is greater than that in the middle, the ring beam at the eaves plays a more significant role.

Installation: It is installed along the exterior walls and some interior walls; single-story buildings require at least one such beam, while multi-story buildings generally have one installed on each floor. In areas prone to earthquakes, ring beams are usually installed on every floor； Function: Improve the overall stiffness and integrity of the building