Pre-internal force of frame and calculation method thereof

Abstract

The invention discloses a pre-internal force of a frame and a calculation method thereof, the frame comprises a first component and a second component connected with the first component to form a connection node, and the method comprises the following steps: adjusting the connection state of at least one connection node of the frame to be a first connection state and applying a pre-load; adjustingthe connection state of at least one connection node of the frame from the first connection state to the second connection state, removing the preload on the frame, and applying a load on the frame;and calculating the internal force of the frame based on the preload, calculating the internal force of the frame based on the unloaded preload and the applied load, and superposing the internal forces to obtain the target internal force. By the adoption of the method, the positive bending moment and the negative bending moment within the full-length range of the frame component can be effectivelyreduced and homogenized through pre-internal-force measures, and then the stress performance and the economical efficiency of the frame in the structure are improved.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a pre-internal force of a frame and a calculation method thereof. Background technique [0002] At present, in order to analyze and judge the controlling internal force of the frame, the method of calculating the bending moment of the frame is mainly used. At present, the calculation of the bending moment of the frame is usually calculated by generating the connection state between the components of the frame at one time to bear the load, and the economy, rationality, and feasibility of the frame are determined according to the calculated structure. [0003] However, in the actual design and construction, it is found that the force distribution of the frame calculated by the above method is extremely uneven. For the frame, the force, mainly the bending moment, has a very important influence on the performance of the frame components. That is to say, the bending mo...

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Problems solved by technology

[0003] However, in the actual design and construction, it is found that the force distribution of the frame calculated by the above method is extremely uneven. For the frame, the force, mainly the bending moment, is very important to the performance of the frame components

That is to say, the bending moment calculated by the above method, for the frame, the difference between the two ends of the member and the middle part of the bending moment is relatively large, which may lead to the need to increase the member section of the frame, which in turn leads to higher engineering cost. more difficult to build

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