Structural assembly means that after the assembly is completed, the assembled parts will bear certain external forces under normal circumstances.
Glue is divided into sealant and structural glue; Sealant is used to seal the gap and waterproof, and can bear less sea force. Structural adhesive is used to adhere the force-bearing parts, and its main function is to transmit external force on the contact surface of the two parts.
Because you want to be waterproof by the pool, strictly speaking, it should be silicone building sealant. In fact, any glue can be used, but it is environmentally friendly, durable and waterproof.
What are the main contents of the assembly process of the structure?
General description of junction application
Layout plan of foundation (including pile, pile cap, raft and other plans, details and notes);
Wall column positioning plan; Structural column of masonry structure;
The beam layout of each layer (including roof layer) is marked by leveling method; Ring beam of masonry structure;
Each floor slab and reinforcement diagram (including roof layer and elevator machine room layer) shall be marked by tiling method;
Tables of walls and columns (detailed elevations, reinforcement drawings, details, etc. );
Stairs, elevator planes, profiles and steel bars;
Others such as guardrails and components, flower stands, awnings, awnings, gutters and other components and equipment foundations.
The structural construction drawing of steel structure is detailed separately.
What's the difference between prefabricated and prefabricated monolithic buildings?
Prefabricated components-Prefabrication of building components
Integral assembly-integral prefabrication of buildings
Overall performance of assembled structure
In 2005, Liu et al. of Hefei University of Technology conducted an experimental study on two two-span precast prestressed concrete frames under low cyclic loading [8]. See Figure 5 for frame size and reinforcement. The test results show that the hysteretic curve of the beam end section which only depends on the bending of prestressed tendons is full and has good energy dissipation capacity. When the curvature ductility coefficient reaches 4, the bearing capacity of the section does not decrease obviously, which can meet the requirements of moment amplitude modulation. The residual deformation after unloading is small, and the section still has deformation recovery ability after yielding; Symmetric and antisymmetric loading methods have no obvious influence on the mechanical properties and ductility of the mid-span and beam ends, but only have great influence on the mechanical state of the core area of the middle column joints. In 2009, Han et al. of Beijing University of Technology carried out horizontal low cyclic loading test on a prestressed assembled frame KJ2 [9]. In order to ensure that the concrete at the end of KJ2 beam is well restrained, carbon fiber cloth twice the height of the beam is strengthened at the end of the frame, and spiral stirrups with a diameter of 4mm are added at both ends of the beam to restrain the concrete at the end, so as to improve the local compressive strength of the concrete at both ends of the assembled frame beam. The completed frame is shown in Figure 6. The test shows that compared with the cast-in-place concrete frame, the energy consumption capacity of prestressed assembled frame is slightly lower than that of cast-in-place concrete frame, and its ductility and deformation recovery capacity are better than that of cast-in-place concrete frame. In 2005, Lv Xilin of Tongji University and others carried out pseudo-dynamic tests on a 1/2 scale model of a single-story single-span three-story prefabricated concrete frame structure, and the beam-column joints were connected by rubber gasket bolts [10]. See Figure 7 for details of beam-column joints and beam-slab joints. The test shows that this prefabricated concrete frame structure has good seismic performance; The beam-column joints connected by rubber gasket bolts work well in the test, while the plate-beam joints connected by welding are seriously damaged in the test. The welded joint between roof panel and beam is the weak link of this kind of structure.
Seismic performance of assembled structure
According to the American NEHRP (National Research Haz-ARDS Reduction Program) 2000 specification [1], precast concrete frame connections can be divided into equivalent cast-in-place connections and fabricated connections, and the equivalent cast-in-place connections are required to meet or exceed the seismic performance of cast-in-place concrete connections, and the mechanical properties of fabricated connections and cast-in-place concrete connections are different, so NEHRP has separately stipulated seismic regulations. Commonly used equivalent cast-in-place joints include post-cast integral joints and prestressed splicing joints, and commonly used assembled joints include welded joints and bolted joints. 1. 1 equivalent cast-in-place joint 1. 12 unbonded prestressed tendon splicing joint Priestley of the University of California, USA, made a theoretical study on partially bonded prestressed splicing joint [2], and he pointed out that because the prestressed tendon is not bonded with concrete in the joint and on both sides of the joint, it can still maintain elasticity when the joint is greatly deformed. After large deformation, the strength and stiffness attenuation and residual deformation of this joint are small, and the joint has strong restoring force. Due to the clamping constraint of prestress, it is beneficial to the shear resistance of joint area and can reduce the number of stirrups in joint area. Priestley tested eight unbonded prestressed beam-column joints under low cyclic loading. The test results show that the maximum interlayer deformation of the joint can reach 2.8%~4%, and the residual deformation is about 2.2% of the maximum interlayer deformation. During large deformation, due to the plastic development of concrete at the beam-column interface, the stiffness of the joint decreases, but the joint is only slightly damaged. Compared with cast-in-place concrete joints, precast concrete unbonded prestressed splicing joints have less energy consumption, damage, strength loss and residual deformation. 1.2 spliced joints with bonded prestressed tendons In 2004, Liu et al. of Hefei University of Technology conducted low-cycle cyclic loading tests on two precast prestressed concrete frame beam-column assemblies [3]. Sample size and reinforcement are shown in Figure 1. The test results show that due to the existence of corbel, there is a lifting effect under reverse loading, the bending bearing capacity of normal section should be reduced, and the shear friction at the beam end can resist the shear force at the beam end. The prestress makes the specimen have strong deformation recovery ability, which is beneficial to post-earthquake repair. In 2005, Beijing University of Technology carried out the loading test of six mixed-connection assembled concrete frame joints under low cyclic loading [4], and the specimen size and reinforcement diagram are shown in Figure 2. The test shows that the energy dissipation capacity of hybrid connection assembled concrete frame joints is equivalent to that of integral cast-in-place concrete joints, but the ductility and deformation recovery capacity are better than that of integral cast-in-place concrete joints, and the comprehensive seismic performance is better than that of integral cast-in-place concrete joints. 1.3 post-cast integral joints 1998, and Vasconez carried out repeated loading tests on 13 precast concrete joints [5], including 9 steel fiber reinforced concrete joints, 3 polyvinyl alcohol fiber reinforced concrete joints 1 joint and 3 ordinary concrete joints. The test results show that steel fiber can improve the performance of the joint more effectively than polyvinyl alcohol fiber. Post-pouring steel fiber concrete can improve the bond strength between steel bars and concrete, which is helpful to improve the ductility of joints, delay the occurrence of damage and improve the shear strength of joints. Compared with common post-pouring joints, the strength, energy consumption and deformation capacity of steel fiber reinforced concrete joints are improved by about 30%, 35% and 65% respectively. Using steel fiber reinforced concrete with volume content of 3% can reduce the stirrup consumption in the joint area by 50% and obtain better seismic performance. In 2004, Zhao Bin of Tongji University and others carried out experimental research on high-strength concrete post-cast integral beam-column assembly and high-strength steel fiber concrete post-cast integral beam-column assembly under low cyclic loading [6]. The test shows that the post-cast integral beam-column assembly of precast high-strength concrete structure has the same seismic capacity as the beam-column assembly of cast-in-place high-strength concrete structure, and the post-cast joint of precast concrete structure can be cast with high-strength steel fiber concrete, which can reduce the stirrup consumption in the joint area and improve the bearing capacity of the joint.
Compare the advantages and disadvantages of cast-in-place concrete structure and assembled structure
I can only give you a hint: think about the difference between fried food and fast food from another angle, and what is the essence of them! ! ! !
Why does the prefabricated building emphasize the assembly integration technology of the main part of the structure, the interior decoration part and the equipment pipeline?
Why is architecture strong?
What is an assembled prestressed concrete T-beam with simple support and continuous structure?
Refers to the T-shaped beam section, prestressed assembly, simply supported first, and the stress state is continuous beam after connecting at the bearing.
What does it mean that the installation structure of lamps adopts IP2X type?
Precautions for lamp installation 1. The most basic requirement for the installation of lamps and lanterns is that they must be firm. 2. When installing lamps such as wall lamp, bedside lamp, desk lamp, floor lamp and mirror headlight indoors, the metal shell of lamps with a height of less than 24m and below shall be grounded to ensure safe use. 3. When installing short-legged lamp holders in toilets and kitchens, porcelain screw short-legged lamp holders should be adopted.