CN-122020823-A - Partition wall structure integrated fine modeling and simulation method based on physical reality

CN122020823ACN 122020823 ACN122020823 ACN 122020823ACN-122020823-A

Abstract

The invention relates to the technical field of building structure engineering, in particular to an integrated fine modeling and simulation method based on a physical and real partition wall structure, which constructs a complete and closed technical chain from fine physical modeling, connection and failure linkage algorithm definition, overall process nonlinear simulation and finally automatic multi-objective parameter optimization, integrates the working-damage-failure-influence full life cycle behavior of a partition wall subsystem into the overall structure performance design by using a strict mathematical model and a numerical algorithm, and forms a highly innovative, computable and verifiable special design system, thereby completing quantitative and performance design of a shock absorption connection structure. By introducing a series of mathematical models, criteria and linkage algorithms with definite physical significance, the improvement of the black box experience of the traditional period reduction coefficient is realized.

Inventors

SHU MENG
ZHAO SHIXING
LIU JINTAO
LIU YUPENG
Zhu Yueshuang
XIA JING
ZHANG CONGCONG

Assignees

四川省建筑设计研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (10)

1. The integrated fine modeling and simulation method based on the physical reality is suitable for the computational simulation and design of an assembled shock-absorbing partition wall structure system, wherein the assembled shock-absorbing partition wall structure system comprises an assembled partition wall (1), a frame beam, a frame column and a shock-absorbing damper (10), and is characterized by comprising the following steps: S1, establishing a parameterized geometric, material and damage criterion model for failure simulation, establishing a physical real fine numerical model of an assembled partition wall (1) in an assembled shock absorption partition wall structure system, and integrating damage criterion; S2, defining a connection interface mechanical model and a linkage mechanism, simulating connection behaviors between an assembled isolation wall (1) and a main structure consisting of frame beams and frame columns in an assembled shock absorption isolation wall structure system, and establishing a linkage rule of the main structure and a damage state of the assembled isolation wall (1); S3, performing overall-process nonlinear collaborative simulation and failure simulation, wherein the overall-process nonlinear simulation comprises a 'damage-exit-internal force redistribution' mechanism in an assembled shock absorption partition wall structure system; s4, parameter automatic optimization design driven by multi-target performance converts the design problem of the assembled shock absorption partition wall structure system into a mathematical optimization problem, searches the optimal design parameters through automatic iteration, and finally outputs scientifically optimized connection construction parameters.
2. The method for integrated fine modeling and simulation of a partition wall structure based on physical reality according to claim 1, wherein in S1, the assembled partition wall (1) in the assembled shock absorbing partition wall structure system is used as an independent unit for fine geometric modeling, the assembled partition wall (1) is endowed with a nonlinear material constitutive model, and a comprehensive damage criterion function based on strain, damage and energy consumption is integrated for the assembled partition wall (1) to serve as a whole process behavior numerical basis for simulating 'work-damage-failure'.
3. The integrated and refined modeling and simulation method based on the physical reality partition wall structure according to claim 2, wherein the nonlinear material constitutive model is expressed as follows: ; Wherein the method comprises the steps of Describing the stress state of any point in the partition wall material for the Cauchy stress tensor; for the damage variable (d is more than or equal to 0 and less than or equal to 1), the degree of material rigidity degradation is represented, 0 represents perfect, 1 represents complete damage, and the evolution variable is represented by tension damage And compression injury evolution variable Defining a rule; Is a tension injury evolution variable; is a compression injury evolution variable; the stiffness characteristics of the material when undamaged are the initial elastic stiffness tensor; The total deformation of the material under the action of load is the total strain tensor; as a plastic strain tensor, the material undergoes an unrecoverable plastic deformation portion.
4. The integrated and refined modeling and simulation method based on the physical reality partition wall structure according to claim 2, wherein the comprehensive destruction criterion function is expressed as follows: ; Wherein, the To synthesize damage index, judging whether the partition wall reaches the damage state, if so Judging that the component is damaged when the temperature is more than or equal to 1.0; the actual strain value of the partition wall under the current load is obtained; the limit strain value which can be born by the partition wall material; the ratio of the key point strain to the limit strain; Is a comprehensive damage index of tensile and compressive damage, and has ; Cumulative dissipation energy consumed by the partition during loading; maximum energy dissipation capacity that can be dissipated for the partition material; is the cumulative energy consumption ratio.
5. The integrated and refined modeling and simulation method based on the physical reality partition wall structure according to claim 3 or 4, wherein in S2, a nonlinear force-displacement model of the wall top shock absorbing damper (10) is defined, and a linkage algorithm is set, when the partition wall is monitored to reach a broken state, an instruction is automatically triggered to reduce the connection efficiency, so that the dynamic transition of the connection system from "cooperative work" to "failure isolation" is physically and truly simulated.
6. The integrated and refined modeling and simulation method based on the physical reality partition wall structure according to claim 5, wherein the force-displacement model is expressed as follows: ; Wherein, the Outputting a force for the shock absorbing damper (10); is the initial locking rigidity of the shock absorption damper (10) when not sliding; / for a sliding displacement; The friction coefficient of the friction interface; a normal pre-tightening force applied to the friction surface; the rigidity of the damper after sliding; Is the relative movement displacement of the two ends of the damper; The relative movement speed of the two ends of the damper; is a sign function for extracting the sign of the input value.
7. The integrated and refined modeling and simulation method based on the physical reality partition wall structure according to claim 6, wherein in S3, nonlinear static/dynamic analysis is performed on the model constructed in S1, and when a certain partition wall unit in the assembled partition wall (1) is damaged by criteria, the state of "out of service" is simulated by modifying its stiffness matrix and calculating unloading force, as follows: , ; ; Wherein, the A cell stiffness matrix for describing stiffness characteristics of individual partition cells; a rigidity reduction coefficient which is a rigidity reduction after the partition wall unit is broken; An unloading force vector for the breaking of the partition wall unit; A displacement vector for the breaking moment of the partition wall unit; An original rigidity matrix of the partition wall unit at the breaking moment; is a new stiffness matrix of the partition wall unit after being judged to be broken.
8. The integrated and refined modeling and simulation method based on physical reality partition wall structure according to claim 7, wherein in S3, unloading force is to be exerted As equivalent load is applied reversely, internal force dynamic redistribution is triggered in global system solving, and nonlinear power equation solving of the whole system is based on updated system tangential stiffness matrix There is a formula: ; Wherein, the The nonlinear contribution of all partition wall units, all wall top shock-absorbing dampers (10) and main structures in the assembled partition wall (1) is contained in real time for the internal force vector; Is a mass matrix of the structural system; a damping matrix that is an inherent damping characteristic of the structure; acceleration vectors for each node of the system; the speed vector is the speed vector of each node of the system; is an external force vector which changes with time.
9. The integrated and refined modeling and simulation method based on the physical reality partition wall structure according to claim 8, wherein in the S4, parameters of a shock absorption damper (10) are used as design variables, control structure deformation and energy consumption efficiency improvement are used as comprehensive objective functions, performance constraint conditions are set, simulation flows of the S1-S3 are called as performance estimators, and optimization algorithm automatic loop iteration is adopted, so that scientifically optimized connection construction parameters are finally output.
10. The integrated fine modeling and simulation method based on physical reality partition wall structure according to claim 9, wherein parameters of the shock absorbing damper (10) are used as design variables, expressed as: ; Wherein, the Representing the mechanical parameters of different dampers; Transpose the symbol; Is a design variable; the objective function is: ; Wherein, the Is a comprehensive objective function; the maximum interlayer displacement angle response of the structure at all floors is a measure of the deformation performance of the structure; For total energy consumption of damper system Accounting for total input energy of earthquake Is a measure of energy consumption efficiency; And Is used for adjusting the relative importance of two sub-targets of controlling deformation and improving energy consumption in optimization as a weight coefficient and meets the following requirements + =1; The performance constraints are: ; ; ; ; Wherein, the Is a deformation performance constraint function and has a structure maximum interlayer displacement angle Does not exceed the set value ; Is a constraint of energy consumption performance, and the energy consumption ratio of the shock absorption damper (10) Not lower than a preset minimum required value ; For damage control constraint and proportion of damage to partition units Not exceeding a predetermined destruction rate 。

Description

Partition wall structure integrated fine modeling and simulation method based on physical reality Technical Field The invention relates to the technical field of building structure engineering, in particular to an integrated and refined modeling and simulation method based on a physical and real partition wall structure, which is particularly suitable for the existing building reinforcement engineering in high-rise buildings, public buildings with strict anti-seismic fortification requirements and city updating. Background The impact of non-load bearing partitions such as masonry infill walls, ALC wall panels, etc. has been a critical and complex problem in the seismic analysis and design of building structures, particularly frames and frame shear structures. Conventional design methods typically employ a "period reduction factor" to empirically consider the contribution of the partition to the overall stiffness of the structure. For example, the current technical regulations for high-rise building concrete structures provide that the cycle reduction coefficient of the frame structure is 0.6-0.7, the frame-shear wall structure is 0.7-0.8, the frame-core tube structure is 0.8-0.9, and the shear wall structure is 0.8-1.0. The method is simple and convenient, but has the fundamental defects that firstly, the method is a macroscopic and general experience coefficient, the actual spatial distribution of the partition wall in the structure, the nonlinear mechanical property of the partition wall and the complex interaction mechanism between the partition wall and a main structure cannot be reflected, so that a calculation model has obvious deviation from an actual dynamic response, particularly, the error in an elastoplastic stage is larger, secondly, along with the promotion of building industrialization, various light and high-performance assembled partition walls are widely applied, the material performance and the connection mode of the partition walls and the main body are greatly different from those of the traditional masonry, so that the applicability of the experience coefficient based on the statistics of the traditional masonry is suspected, and the design tends to be conservative or unsafe. In terms of construction measures, in order to mitigate the shock hazard of the partition wall, many improvements have been tried in the industry, such as providing a flexible connection at the wall top, using a lightweight material, or providing control slits, etc. These methods alleviate the damage of the partition wall itself to some extent, but fail to fundamentally solve the problems that the stiffness contribution is difficult to quantify and the cooperative working mechanism with the main structure is not clear in an earthquake. In recent years, although research is attempted to build or connect an energy dissipation device in a partition wall, the design is mostly based on a simplified calculation or an experiment of an isolated component, and the energy dissipation device cannot be accurately estimated due to the fact that the energy dissipation device cannot be placed in an integral structure for integrated collaborative analysis and optimization, and the fine design based on performance is more difficult to realize. Meanwhile, along with the wide application of the assembled partition wall, the material and the connection mode of the assembled partition wall are greatly different from those of the traditional masonry, so that the applicability of the traditional experience coefficient is doubtful, and the design often falls into a conservation or unsafe dilemma. Although attempts have been made in the industry to improve the connection structure, these local measures have failed to fundamentally solve the problems of difficult quantification of the partition stiffness contribution and undefined cooperative working mechanism, and in particular lack of simulation capability for the full life cycle behavior of the partition from "working" to "damage" until "failure exit". Therefore, the research and development background of the invention is derived from the thorough innovation requirement of the traditional 'experience estimation' mode, and the core aim is to create a set of refined simulation system capable of physically and truly simulating the integrated nonlinear collaborative work of the partition wall and the structure until the whole process is destroyed, so as to solve the problem of serious disjoint between the design theory and the real mechanical model. Disclosure of Invention The invention aims to provide an integrated fine modeling and simulation method based on a physical true partition wall structure, aiming at the problems. The technical scheme adopted by the invention is that the integrated fine modeling and simulation method based on the physical reality of the partition wall structure is suitable for the calculation simulation and design of an assembled shock-absorbing partition wall str