Reinforcement Design Method for Reinforced Concrete Complicated Stressed Members Based on Force Transmission Path

Abstract

The invention belongs to the technical field of structural design of civil engineering, and specifically relates to a reinforcement design method for complex reinforced concrete members based on a force transmission path, which is mainly used for the reinforcement design of complex reinforced concrete members that do not meet the assumption of a flat section, such as Deep beams, shear walls, etc., including (1) Obtaining the force transmission path of reinforced concrete complex stress-bearing components; (2) Reinforcement design of components according to the force transmission path; (3) Merging and sorting of steel bars; (4) Structural design of components. The idea of ​​the present invention to carry out the reinforcement design of reinforced concrete complex stress-bearing members based on the force transmission path can change the situation that the traditional experience design method is rough and the precision is low and the theoretical support is not enough based only on the test statistics. It provides a new technical idea for the reinforcement design of complex stressed structural members or new materials that are difficult to solve accurately.

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 for complex reinforced concrete members based on a force transmission path, which is mainly used for the reinforcement design of complex reinforced concrete 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 distribution, such as shear wall structures, the deformation does not conform to the assumption of plane section at all, so it is extremely unreasonable to simplify the design into a bar system structure. [0003] Regarding the reinforcement design of shear walls in complex reinforced concrete members, the design ideas for shear walls in China and the United States are as follows: [0004] 1) In the second section of Chapter...

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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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