Reinforcement design method of reinforced concrete members subjected to complex loads based on force transfer path

Abstract

The invention belongs to the technical field of structural design of civil engineering, The reinforcement design method of reinforced concrete complex mechanical members based on force transfer path is mainly used for reinforcement design of reinforced concrete complex mechanical members which do not conform to plane section assumption, such as deep beams, shear walls and the like, including (1) obtaining the force transfer path of reinforced concrete complex mechanical members; (2) carrying out Reinforcement design according to the path of force transfer; (3) performing consolidation and finishing of reinforcing bars; (4) performing Structural design of components. The present invention is based on the idea that the reinforcement design of the reinforced concrete complex stressed member is carried out with the force transmission path as the starting point, It can change the situation that the rough design of traditional empirical design method leads to low precision and only based ontest statistics leads to insufficient theoretical support, and provides a new technical thinking for the reinforcement design of complex structural members or new materials which are difficult to be solved more accurately nowadays.

Description

Technical field [0001] The invention belongs to the technical field of structural design of civil engineering, and specifically relates to a reinforcement design method of reinforced concrete complex force-bearing members based on force transmission paths, and is mainly used for the reinforcement design of reinforced concrete complex force-bearing members that do not meet the assumption of a flat section, such as Deep beams, shear walls, etc. Background technique [0002] In the structural design industry in civil engineering, for two-dimensional components with complex stress distributions, such as shear wall structures, the deformation has completely failed to meet the assumption of flat section, so it is extremely unreasonable to simplify the design into a bar structure. [0003] Regarding the design of the reinforcement of the shear wall in the reinforced concrete complex bearing member, the design ideas of China and the United States for the shear wall are as follows: [0004] ...

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Problems solved by technology

[0005] 2) Section 11.8 and Chapter 14 of ACI 318-14 "Code for Design of Concrete Structures" in the United States also give suggestions on empirical methods. It can be seen that most of the codes in various countries still use flat Based on the cross-section assumption, the design is carried out in analogy to the frame column. Chapter 23 of the code also recommends that the design method of the tension and compression rod model be applied to the design of the shear wall. According to the mechanical characteristics of the complex stressed members, it is divided into B area and D area, B area represents the area that conforms to the assumption of plane section, and D area indicates the area that does not meet the assumption of plane section. The tension and compression bar model is established for reinforcement design, but it ignores the nonlinear characteristics of concrete members and other reasons, there are still certain defects

GB50010-2010 also gives suggestions on stress design methods while giving empirical methods. It is suggested that two-dimensional or three-dimensional non-bar structural members, after obtaining the stress design value distribution of members according to elastic or elastic-plastic analysis methods, can be calculated according to The projection of the resultant force of the design value of the main tensile stress in the reinforcement direction determines the reinforcement amount, and the reinforcement layout is determined according to the distribution area of ​​the main tensile stress; ACI 318-14 also suggests that the design of the wall height should not exceed the horizontal shear length of the wall 2 times the tension and compression rod model design method can be used, so as far as the current technology is concerned, there is a lack of reinforcement methods that can be directly applied to complex stressed members

Nowadays, most of the shear wall design codes in various countries are empirical design methods. Most of the design methods are a set of theories summarized through a large number of experiments and experiences, and this method is still based on the assumption of a plane section, analogous to frame columns. , which is unreasonable

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