CN-121997412-A - Design method for controlling building structure force flow based on staged hinging

CN121997412ACN 121997412 ACN121997412 ACN 121997412ACN-121997412-A

Abstract

The invention discloses a design method for controlling building structure force flow based on staged hinging. The design method comprises the steps of firstly constructing an integral simulation model of a building structure, setting the end parts of each component to be just connected, inputting the dead weight and the additional constant load of the structure, analyzing the stress condition of each component, secondly calculating the bending moment of each component under different influence factors, analyzing the large bending moment cause of the end parts of each component, determining the end parts of the components to be adjusted and connected, setting the end parts of the components to be hinged after the initial simulation model is restored, reapplying the dead weight and the additional constant load of the structure, calculating the bending moment of each component, finally defining the end parts of the components defined to be hinged to be just connected under the condition of maintaining the internal force of the components under the added constant load, applying different influence factors, calculating the internal force of the components, and calculating the strength and the stability of the components. The design method of the invention not only reduces the bending moment born by the specific component, but also does not reduce the structural redundancy and does not change the structural earthquake resistance.

Inventors

ZHAO HONGKANG

Assignees

启迪设计集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251225

Claims (3)

1. The design method for controlling the force flow of the building structure based on the staged hinging is characterized by comprising the following steps: (1) Constructing an integral simulation model of the building structure, setting the end parts of all the components in the model to be just connected, inputting the self weight and additional constant load of the structure in the model, and carrying out simulation analysis on the stress condition of all the components of the integral building structure; (2) Applying different influence factors to the simulation model, respectively calculating bending moments of each component under the different influence factors through a calculation model to obtain bending moment change rules of different parts of the structure under the different influence factors, fitting the relation between the influence factors and the bending moment of the components, analyzing the cause of the large bending moment of the end parts of each component, determining whether the large bending moment of each component is caused by additional constant load, and further determining the end parts of the components which need to be adjusted and connected; (3) After the initial simulation model in the step (1) is restored, the end parts of the components which are required to be adjusted and connected in the step (2) are hinged, the dead weight of the structure and the additional constant load are reapplied, and the bending moment of each component is recalculated; (4) Redefining the ends of the member previously defined as hinged as rigid joints while maintaining the force in the member at the constant load applied in step (3); (5) And (3) redefining the end parts of the components in the step (4) to apply different influence factors to the component models just connected, calculating the internal force generated by the components under the action of the different influence factors, based on different combinations of the internal force obtained by calculation and the internal force of the components under constant load in the step (3), obtaining a plurality of groups of designed internal forces, checking the strength and the stability of the components, and if the internal force does not pass, carrying out the step (2) again, and determining the position of the staged hinge needing to be adjusted.
2. The method of claim 1, wherein the different influencing factors in step (2) and step (5) include live load, wind load, temperature change, and seismic effort.
3. The method of claim 1, wherein the step (5) of redefining the position of the stepwise hinge to be adjusted is to add or subtract the stepwise hinge around the end of the member to which the connection is to be adjusted or to reselect an adjacent end of the member as the stepwise hinge to replace the end of the member.

Description

Design method for controlling building structure force flow based on staged hinging Technical Field The invention belongs to the field of building structures, and particularly relates to a design method for controlling building structure force flow based on staged hinging. Background With the development of economy and society and the improvement of use demands, large-span structural designs are more and more common. Conventional large span beam cross-section designs are typically controlled by vertical loads (constant load, live load, etc.), where the constant load accounts for over 70% of the total load. The current structural design is based on the mode that the nodes among structural members are locked or cast, the nodes become rigid connection nodes, the structure forms a complete system, and then a load is applied. The method comprises the steps of firstly connecting beam-column joints to form a structural system, then constructing a floor slab for loading, firstly building scaffold support templates, then pouring column-beam plates, and dismantling the template supports when the structure reaches the design strength, wherein the column-beam plates form a complete structural system and then are loaded, and the two modes are modes of firstly forming the structural system of the rigid joint and then loading. The problems brought by the existing design mode of reloading just after connection include (1) that the moment of bending distributed by the beam ends is larger than that of midspan caused by the rigid connection of the nodes, the beam section is required to be made larger, the beam ends are required to be made stronger to meet the requirements, and then the anti-seismic concept of a strong column and a weak beam is difficult to realize, the ductility of the structure is low, the safety of the structure is low when an earthquake comes, and (2) the influence of the moment of bending of the beam ends on the connected columns is low, and the moment of bending of the beam ends on two sides of the columns is unbalanced and is added on the columns due to unequal beam spans, unequal loads, unequal compression deformation of the columns and the like, so that the moment of bending of the columns is increased, the operation of the columns is further caused to be unfavorable, and the economical efficiency of the system is not good. In the prior art, the structural member is permanently hinged or permanently rigid connected, wherein the permanent hinge can reduce structural redundancy, has obvious influence on structural dynamic characteristics and influences structural anti-seismic performance, and the huge bending moment caused by the permanent rigid connection can cause large cross section of the structural member, high material consumption and high earthquake effect, and deteriorates structural performance and reduces economic benefit. Disclosure of Invention Aiming at the problems in the background art, the invention provides a design method for controlling the force flow of a building structure based on staged hinging, which is used for reducing the bending moment of a specific component without reducing the structural redundancy and changing the earthquake resistance of the structure in order to solve the problems of overlarge cross section and poor economy caused by overlarge bending moment under the constant load of the building structure component. In each working condition of the structure, the dead weight and other constant load of the structure account for most (about 70% -80%), and the direction is constant. When a member is subjected to a great bending moment under constant load, the member needs a corresponding great resistance to ensure safety, thereby bringing about great section requirements and material consumption. When the constant load is applied, the specific part of the component is made into a hinge capable of releasing the bending moment, and after that time, measures are taken to restore the component to be just subjected to the live load, wind load, temperature load and possible earthquake action. The internal force of the component is greatly reduced, the smaller section can be realized, the materials are saved, and the characteristics of the whole structure under the action of wind load and earthquake are hardly changed. In order to achieve the above object, the present invention provides the following technical solutions: a design method for controlling building structure force flow based on staged hinging comprises the following steps: (1) Constructing an integral simulation model of the building structure, setting the end parts of all the components in the model to be just connected, inputting the self weight and additional constant load of the structure in the model, and carrying out simulation analysis on the stress condition of all the components of the integral building structure; (2) Applying different influence factors to the simulation model, respectively calculating be