CN-122013885-A - Assembled lattice type steel reinforced concrete combined structure and design and construction method

CN122013885ACN 122013885 ACN122013885 ACN 122013885ACN-122013885-A

Abstract

The invention relates to an assembled lattice type steel reinforced concrete composite structure and a design and construction method thereof, wherein the structure is a concrete frame-shear wall structure or a concrete frame-core tube structure, and comprises prefabricated columns, prefabricated shear walls, prefabricated beams and floor slabs, wherein the prefabricated columns, the prefabricated shear walls and the prefabricated beams comprise lattice type frameworks and outsourced concrete, the lattice type frameworks are formed by longitudinal stressed steel bones and transverse decoration materials, a main body of the lattice type frameworks is buried in the outsourced concrete, overhanging steel bone sections are arranged at the end parts of the main body of the lattice type frameworks, and the prefabricated columns, the prefabricated shear walls and the prefabricated beams are connected on site through the overhanging steel bone sections to form nodes. Compared with the prior art, the invention has the advantages of excellent structural performance, economy, high-efficiency and reliable connection mode and integrity, quickened construction speed, wide application adaptability and flexibility, and good construction controllability and quality guarantee.

Inventors

LOU GUOBIAO
Yan Menxu
LI YULONG
LI YIFAN
Chen Pixu

Assignees

同济大学

Dates

Publication Date: 20260512
Application Date: 20260304

Claims (10)

1. An assembled lattice type steel skeleton concrete combined structure is a concrete frame-shear wall structure or a concrete frame-core tube structure, and is characterized by comprising prefabricated columns, prefabricated shear walls, prefabricated beams and floor slabs; The prefabricated column, the prefabricated shear wall and the prefabricated beam comprise a lattice type framework and outsourcing concrete, the lattice type framework is composed of longitudinal stressed steel bones and transverse decoration materials, the main body of the lattice type framework is buried in the outsourcing concrete, and the end part of the main body of the lattice type framework is provided with an overhanging steel bone section; And the prefabricated columns, the prefabricated shear walls and the prefabricated beams are connected on site through the overhanging steel rib sections to form nodes.
2. An assembled lattice steel reinforced concrete composite structure according to claim 1, characterized in that the composite structure is a concrete frame-shear wall structure comprising a first frame part (1), a shear wall part (2); The first frame part (1) comprises a first lattice type steel reinforced concrete composite column (1-1) and a first lattice type steel reinforced concrete composite beam (1-2), the shear wall part (2) comprises a first lattice type steel reinforced concrete composite shear wall (2-1), and the shear wall part (2) is distributed inside the first frame part (1); The prefabricated column is a first lattice type steel reinforced concrete composite column (1-1), the prefabricated shear wall is a shear wall part (2), and the prefabricated beam is a first lattice type steel reinforced concrete composite beam (1-2).
3. An assembled lattice steel reinforced concrete composite structure according to claim 2, wherein the first frame part (1) further comprises a first beam-column node (1-3), a first column-column node (1-4), a first beam-column node (1-5), the shear wall part (2) further comprises a first wall-column node (2-2), a first wall-column node (2-3); The first lattice type steel reinforced concrete composite column (1-1) is connected with a first lattice type steel reinforced concrete composite beam (1-2) at a first beam column node (1-3), the first lattice type steel reinforced concrete composite column (1-1) is connected with a first lattice type steel reinforced concrete composite shear wall (2-1) at a first wall column node (2-2), the first lattice type steel reinforced concrete composite shear wall (2-1) is connected with a first lattice type steel reinforced concrete composite beam (1-2) at a first wall beam node (2-3), the first lattice type steel reinforced concrete composite column (1-1) is connected with a first column node (1-4), and the first lattice type steel reinforced concrete composite beam (1-2) is connected with a first beam column node (1-5); The first column joint (1-4), the first beam joint (1-5) and the first wall column joint (2-2) comprise steel bone connecting sections and post-cast slurry which are formed by bolt connection, welding or bolt welding mixed connection, and the post-cast slurry is common concrete, fine stone concrete, grouting material, high-performance concrete or ultra-high-performance concrete.
4. An assembled lattice type steel reinforced concrete composite structure according to claim 1, wherein the composite structure is a concrete frame-core tube structure, comprising a second frame part (4) arranged at the periphery and a core tube part (5) arranged at the middle part; The second frame part (4) comprises a second lattice type steel reinforced concrete composite column (4-1) and a second lattice type steel reinforced concrete composite beam (4-2), and the core tube part (5) comprises a second lattice type steel reinforced concrete composite shear wall (5-1); The prefabricated column is a second lattice type steel reinforced concrete combined column (4-1), the prefabricated shear wall is a core tube part (5), and the Liang Weidi two lattice type steel reinforced concrete combined beams (4-2) are prefabricated.
5. The assembled lattice type steel reinforced concrete composite structure according to claim 4, wherein the second frame part (4) further comprises a second beam column node (4-3), a second beam column node (4-4) and a second beam column node (4-5), and the core tube part (5) further comprises a second wall column node (5-2) and a second wall beam node (5-3); The second lattice type steel reinforced concrete composite column (4-1) is connected with a second lattice type steel reinforced concrete composite beam (4-2) at a second beam column node (4-3), the second lattice type steel reinforced concrete composite column (4-1) is connected with a second lattice type steel reinforced concrete composite shear wall (5-1) at a second wall column node (5-2), the second lattice type steel reinforced concrete composite shear wall (5-1) is connected with the second lattice type steel reinforced concrete composite beam (4-2) at a second wall beam node (5-3), the second lattice type steel reinforced concrete composite column (4-1) is connected with a second beam column node (4-4), and the second lattice type steel reinforced concrete composite beam (4-2) is connected with the second beam node (4-5); The second column node (4-4), the second beam node (4-5) and the second wall column node (5-2) comprise steel bone connecting sections and post-cast slurry which are formed by bolt connection, welding or bolt welding mixed connection, and the post-cast slurry is common concrete, fine stone concrete, grouting material, high-performance concrete or ultra-high-performance concrete.
6. The assembled lattice type steel reinforced concrete composite structure according to claim 1, wherein the longitudinal stress steel reinforced concrete composite structure is a rolled steel section, a welded steel section or a cold-formed steel section.
7. An assembled lattice type steel reinforced concrete composite structure according to claim 1, wherein the transverse decoration material is a batten plate, a batten strip or a stirrup.
8. An assembled lattice type steel reinforced concrete composite structure according to claim 1, wherein the floor slab is a composite floor slab, a reinforced concrete precast floor slab or a reinforced truss floor deck.
9. A method of designing an assembled lattice steel reinforced concrete composite structure as claimed in any one of claims 1 to 8, comprising: s1, designing in a construction stage, namely determining construction load according to the number of assembly layers, analyzing the stress of a lattice type steel reinforced concrete combined member in the construction stage, checking and designing to determine the section size of a steel reinforced, checking and calculating the bearing capacity of a splicing node and a connecting node in the construction stage; S2, integral stability checking calculation in a using stage, namely internal force analysis and integral stability checking calculation of a structure in the using stage, wherein the internal force analysis and the integral stability checking calculation comprise critical load, structural rigidity checking calculation, structural rigidity-weight ratio and integral overturning checking calculation; s3, earthquake proof checking in the using stage, namely analyzing the whole earthquake proof performance of the structure in the using stage and checking the earthquake proof, wherein the earthquake proof checking comprises elastic checking of the structure under the action of most earthquakes, elastic-plastic deformation checking of the structure under rare earthquakes and elastic-plastic deformation checking taking P-delta effect into consideration; S4, checking and calculating a component section in a using stage, wherein the checking and designing of the component section in the using stage comprises calculation of a positive section bending-resistant bearing capacity, calculation of oblique section shearing and torsion-resistant bearing capacity, checking and calculating of a fire resistance limit and calculation of bearing capacity of each node of a lattice type steel reinforced concrete composite column, a lattice type steel reinforced concrete composite beam and a lattice type steel reinforced concrete composite shear wall; s5, checking normal use limit states, namely checking normal use limit states in a use stage, wherein the normal use limit states comprise checking of the width of a crack of a positive section and checking of deflection of a bent component.
10. A method of constructing an assembled lattice steel reinforced concrete composite structure as claimed in any one of claims 1 to 8, comprising the steps of: A1, hoisting a lower layer component in place, and completing steel rib connection with a foundation or an installed component through the overhanging steel rib section, wherein the overhanging steel rib section is connected to form a steel rib connection section, and the steel rib connection section can bear construction loads of a node slurry pouring and maintaining layer (8) and a component assembling layer (9); a2, after the assembly of the components is completed, the component assembly layer (9) is converted into a node slurry pouring and curing layer (8), and the pouring and curing of the node slurry and the assembly of the upper component are simultaneously carried out; A3, repeating the steps A1 and A2, and constructing layer by layer upwards until the installation of all the structural systems is completed.

Description

Assembled lattice type steel reinforced concrete combined structure and design and construction method Technical Field The invention relates to the technical field of prefabricated civil engineering, in particular to an assembled lattice type steel reinforced concrete composite structure and a design and construction method thereof. Background Along with the continuous promotion of building industrialization, the assembled building is widely applied to low-rise and medium-high-rise buildings due to the advantages of short construction period, high resource utilization rate, small environmental impact and the like. The fabricated structure refers to a form of construction where the main structural members are prefabricated in a factory and transported to a construction site for assembly. Compared with the traditional cast-in-situ construction method, the method has the remarkable advantages of high construction speed, stable and reliable quality, short development period and the like, and meets the development requirement of building industrialization. From a structural material perspective, engineering structures can be classified into concrete structures, steel structures, composite structures, and the like. The steel structure is used as a natural assembly system, so that the assembly rate is high and the application range is wide. However, the adaptability of the material to a containment system is poor, and the standardized three-plate member integrating heat preservation, heat insulation, sound insulation, seepage prevention and decoration functions is not available, so that the problems of water seepage, water leakage, insufficient heat preservation and fireproof performance and the like are easy to occur. Meanwhile, the steel structure has irregular section form, influences the decoration and use comfort of the indoor space, has poor fire resistance and corrosion resistance, needs to additionally take protective measures, increases the later maintenance cost, has lower economy and is difficult to meet the use requirements of residential buildings in China. The assembled reinforced concrete structure still has a plurality of technical difficulties in connection mode. Common connection means include wet and dry connection, wet connection typically using a grout sleeve connection technique, i.e., inserting exposed rebar of adjacent prefabricated components into the sleeve and pouring high strength grout in the field to form the connection. This approach theoretically enables better structural integrity, but faces multiple challenges in the actual construction process. Firstly, the exposed steel bars are easy to bend or deform in the processing, transporting and hoisting processes, so that the on-site centering is difficult, and the connection precision and the construction efficiency are affected. And secondly, the nodes have no bearing capacity before the slurry is hardened, cannot bear the load of the construction stage, and are additionally provided with a temporary support system, so that the construction period and the measure cost are increased, and the problem that the reinforcing steel bars are discontinuous after the slurry is hardened is solved. In addition, when the steel bar spacing is smaller, sleeve quantity is more, because telescopic external diameter is 2~3 times of steel bar diameter, and the space that leaves for concrete is narrow, even the factory production also is difficult to guarantee the concrete quality in this region, and grout construction is sensitive to environmental condition, easily receives factors such as temperature, humidity and influences, and on-the-spot construction quality is difficult to stable control. The dry connection is realized by embedding connecting pieces (such as steel plates, bolts, welding pieces and the like) in the prefabricated parts and realizing the assembly between the parts by the bolt connection or the welding mode on site. The method has the advantages that the construction speed is high, the influence by the environment is small, the connection rigidity is insufficient, the equivalent overall performance of a cast-in-situ structure is difficult to form, particularly in high-rise buildings, the structural system has high requirements on the anti-seismic performance of the connection nodes, the dry connection mode can hardly meet the mechanical performance standard of 'equivalent cast-in-situ', and the problems of poor structural integrity, insufficient anti-seismic capacity and the like exist. In addition, the condition that steel is exposed usually exists at the node, and problems in fireproof and corrosion prevention are easy to occur, so that the durability and the safety of the structure are further affected. The steel-concrete combined structure is cooperated with concrete through the steel bones to bear external load together, and has the ductility of the steel structure and the durability of the concrete. The structural member is gene