CN-122018396-A - Multidimensional response cooperative control method for earthquake-resistant structure

CN122018396ACN 122018396 ACN122018396 ACN 122018396ACN-122018396-A

Abstract

The invention discloses a multidimensional response cooperative control method of an earthquake-resistant structure, which relates to the technical field of earthquake resistance of engineering structures and comprises the following steps: and synchronously acquiring a horizontal displacement signal, a vertical vibration signal and a space rotation signal generated by the building structure under the earthquake action, fusing the three types of dynamic information on a unified time axis to form a pressure shear response map of horizontal, vertical and rotation coupling, and determining a critical intersection point of horizontal and vertical composite stress in the pressure shear response map. The invention realizes active unloading and compression shear peak value reduction before earthquake and ensures continuous and stable structure stress by unified fusion of multidimensional response and early triggering of pulse anchor signals, and simultaneously adopts negative time delay traction, wrong frequency release and breathing type energy distribution modes to balance energy dissipation of a shock insulation layer, and control and autonomous stabilization of structure deformation so as to improve earthquake-resistant continuous performance and earthquake-resistant recovery capability of a building.

Inventors

GUO YANLONG
ZHOU PENGFEI
WANG LEI
YUAN LIJUN
WANG ZHIHUI
YUE JUN
FENG LEI
Qi yongfeng
WANG FUBIAO
LU SIXING
ZHANG FAN

Assignees

中建三局集团有限公司
中建三局第三建设工程有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260128

Claims (8)

1. The multidimensional response cooperative control method of the earthquake-resistant structure is characterized by comprising the following steps of: Synchronously acquiring a horizontal displacement signal, a vertical vibration signal and a space rotation signal generated by a building structure under the action of an earthquake, fusing three types of dynamic information on a unified time axis to form a pressure shear response map of horizontal, vertical and rotation coupling, and determining a critical intersection point of horizontal and vertical composite stress in the pressure shear response map; Intercepting adjacent millisecond stress variation fragments by taking a critical intersection point as a center, carrying out time sequence screening on each fragment, extracting a stress sudden rise rule, condensing the rule into a vertical reverse pulse fingerprint, and generating a pulse anchor signal; Setting an early trigger gate according to a pulse anchor signal at the front section of a time axis, and opening an energy unloading channel instantaneously before a vertical pulse arrives to construct an unloading window for releasing local stress in advance; Collecting a horizontal side movement signal and a vertical compression signal at the unloading window stage, performing time synchronization registration, and performing joint adjustment of negative delay traction and error frequency release to form a return towing rope for response and stabilization of a guide structure; And dynamically regulating and controlling the energy dissipation path of the shock insulation layer according to the back-dragging index, distributing compression-shearing energy in stages by adopting a breathing type strong and weak replacement mode, and restoring the structure to a stable state after the seismic pulse acts through section-by-section compression-shearing decoupling and synchronous displacement limiting.
2. The method for collaborative control of multi-dimensional response of a seismic structure according to claim 1 wherein the critical intersection point determination steps are as follows: measuring devices for recording horizontal displacement signals, vertical vibration signals and space rotation signals are respectively arranged at different stress key positions of the building structure, and the three signals have the same starting time mark and are continuously sampled through starting by unified time synchronization signals; After the continuous multidirectional response signals are obtained, the time starting points of the horizontal displacement signals, the vertical vibration signals and the space rotation signals are uniformly corrected, the response in each direction has consistent time scales on the same time axis through standardization processing, and corresponding parameters are matched point by point to realize time dimension fusion; carrying out mechanical coupling analysis on the multidimensional response signals subjected to time fusion, drawing a compression shear response map by taking time as a transverse parameter and taking the comprehensive response of horizontal displacement, vertical vibration and space rotation as a longitudinal parameter, and keeping the one-to-one correspondence of the response parameters; According to the intersection relation of the horizontal response curve and the vertical response curve in the compression-shear response map, determining a critical intersection point of the horizontal and vertical composite stress, and determining a critical state of the structure under multidimensional coupling stress by combining the angular displacement change trend of the spatial rotation signal.
3. The method for collaborative control of multi-dimensional response of an anti-seismic structure according to claim 2 wherein the step of generating the pulsed anchor signal is as follows: establishing a millisecond analysis window by taking a critical intersection point of horizontal and vertical composite stress as a time center in a compression-shear response map, covering a stress rapid growth stage and a peak attenuation stage on a time axis, and extracting synchronous stress change data from a horizontal displacement response curve and a vertical vibration response curve; carrying out time sequence screening on stress change data in an analysis window, identifying a time interval in which horizontal shearing stress and vertical compressive stress synchronously rise on a time axis, and retaining key fragments with short duration and sudden stress rise; analyzing the screened stress fragments, extracting the whole process of changing the vertical stress from forward change to reverse change, recording the starting time, the peak time and the recovery time, and determining the sudden rise rule of the vertical reverse pulse; And inducing the extracted stress sudden rise rule, establishing a vertical reverse pulse fingerprint, generating a pulse anchor signal according to the time characteristics of the fingerprint, and taking the pulse anchor signal as a time reference of a subsequent control stage.
4. The method for collaborative control over multi-dimensional response of an anti-seismic structure according to claim 3, wherein generation of a pulse anchor signal takes initial time of vertical stress from a stable state to a sudden rise state as an anchor point, takes peak duration of the vertical stress and recovery delay time as time reference parameters, and determines a pulse peak position by combining synchronous change characteristics of horizontal stress and vertical stress, so that the pulse anchor signal can accurately reflect a stress conversion process of the structure under the action of vertical reverse pulse and is used for time triggering of subsequent energy unloading control.
5. A method of collaborative control of multi-dimensional response of a seismic structure according to claim 3 wherein the unloading window is constructed as follows: After the pulse anchor signal is determined, calibrating the position of the pulse anchor signal on a time axis, and establishing an advanced trigger interval in a time period before the pulse anchor signal, wherein the trigger interval is used as a time reference area for energy control; Setting an advance trigger gate in the advance trigger interval, and immediately starting the advance trigger gate to enter an active unloading stage when the vertical stress continuously grows and the growth rate exceeds a preset limit value and the vertical compression ratio is reached along with the horizontal displacement increment; an energy unloading channel is established along a stress path of the building structure after the triggering door is started in advance, so that the vertical bearing member can generate instantaneous elastic expansion and contraction and the horizontal connecting member can generate displacement yielding; And defining a continuous interval of energy unloading on a time axis after the energy unloading channel is established, and forming an unloading window covering the initial stage of vertical impact to the front of an energy peak value.
6. The method according to claim 5, wherein the energy unloading channels are sequentially opened along the intersection area of the vertical load-bearing member and the horizontal connecting member during the establishment process, so that the elastic expansion and contraction of the vertical load-bearing member and the displacement yielding of the horizontal connecting member are kept continuous in time, and energy is alternately transferred between the vertical and horizontal paths, so as to form a point-to-plane diffusion release process.
7. The method for collaborative control of multi-dimensional response of a seismic structure according to claim 5 wherein the step of forming a tow-back index is as follows: acquiring a horizontal side movement response and a vertical compression response of a building structure after an unloading window is formed, and keeping the same sampling frequency and time interval by taking the starting moment of the unloading window as a unified time reference to obtain a horizontal side movement curve and a vertical compression curve which cover the whole unloading stage; after the acquisition is completed, the time axes of the two types of response signals are aligned uniformly, and time synchronization registration is carried out by identifying a horizontal side shift peak point, a vertical compression extreme point and a change inflection point; After time synchronization registration, negative time delay traction operation is implemented, so that the vertical compression response is changed in advance relative to the horizontal side movement response to form a sequential release effect; After the negative time delay traction is completed, performing error frequency release adjustment to enable energy release in the vertical and horizontal directions to be complementary in frequency; and after the joint adjustment is finished, analyzing the recovery stage of the horizontal and vertical responses, extracting a synchronous stable-returning time interval and forming a drag-back index.
8. The method for collaborative control of multi-dimensional response of a seismic structure according to claim 7 wherein the step of dynamically adjusting the energy dissipation path of the seismic isolation layer according to the back-drag index is as follows: According to the time sequence of the back towing index and the energy response information, identifying a horizontal sliding path, a vertical bearing path and a shearing transmission path in the shock insulation layer, dividing an energy release stage by taking the time sequence as a reference, and dynamically adjusting the energy flow direction and the release rate of each path; After the energy path identification is completed, carrying out the phased energy distribution of breathing type strong and weak replacement, releasing vertical energy and sharing horizontal shearing force in a strong dissipation stage, reducing the vertical release rate and recovering horizontal displacement in a weak dissipation stage, and enabling the energy release to form periodic circulation; implementing piecewise compression shear decoupling in the energy distribution process, releasing vertical compression stress in a strong dissipation stage, and releasing horizontal shear energy in a weak dissipation stage; Synchronous displacement amplitude limiting control is carried out in the compression-shear decoupling process, a towing indexing time node is taken as a reference, the change rate of horizontal displacement and vertical compression is restrained, the structure is prevented from being excessively deformed, and dynamic balance is maintained; And after the section-by-section compression shear decoupling and the synchronous displacement amplitude limiting are completed, energy is conducted to return to stability, the strong dissipation path is gradually closed according to the return traction index, the slow-release energy of the weak dissipation path is reserved, and the vibration isolation layer is restored to a stable state.

Description

Multidimensional response cooperative control method for earthquake-resistant structure Technical Field The invention relates to the technical field of engineering structure earthquake resistance, in particular to a multidimensional response cooperative control method of an earthquake resistant structure. Background The multidimensional response cooperative control of the earthquake-resistant structure means that the horizontal displacement control, the vertical vibration reduction and the integral rotation of the structure are stabilized to cooperatively play roles in a plurality of directions through systematic design under the earthquake action. The core of the device is complementary coordination among different stress paths, namely that the earthquake energy is dispersed by cycle extension and slippage release in the horizontal direction, the high-frequency vibration energy is absorbed by an elastic or damping element in the vertical direction, and the rotation direction is kept stable integrally by virtue of a limit and coupling member. Through the multidimensional cooperative response, the structure can realize diversion and dissipation in the multidirectional input of seismic energy, avoid damage caused by unidirectional rigid stress, and form a comprehensive anti-seismic system with cycle delay, deformation control and stable path. The method can maintain the overall continuity and safety of the building under rare earthquakes, and simultaneously gives consideration to the vibration comfort and function stability in daily use stage, and shows the performance improvement and the concept upgrading from unidirectional earthquake resistance to full-dimensional cooperative protection. The prior art has the following defects: In the prior art, the vibration isolation and damping system mainly aims at the horizontal earthquake energy to perform cycle extension and energy dissipation control, and is insufficient in consideration of transient response of vertical earthquake pulses. When extremely short vertical reverse pulse appears in the partial strong shock record, the structure still receives vertical impact action after the horizontal delay period stage is entered, so that vertical pressure in the isolation layer is instantaneously overlapped with horizontal shearing force, and unexpected pressure shearing compound effect is generated. Because the vertical reverse pulse is extremely short in duration and concentrated in energy, the traditional monitoring system is difficult to capture in time, and the shock insulation support or the friction sliding interface can generate unsteady jump in millisecond level, so that the stress mutation and the rigidity of the isolation layer are rapidly increased, and even the function loss of the shock insulation layer is caused. The above information disclosed in the background section is only for enhancement of understanding of the background of the disclosure and therefore it may include information that does not form the prior art that is already known to a person of ordinary skill in the art. Disclosure of Invention The invention aims to provide a multidimensional response cooperative control method of an earthquake-resistant structure, which aims to solve the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme that the multidimensional response cooperative control method of the earthquake-resistant structure comprises the following steps: Synchronously acquiring a horizontal displacement signal, a vertical vibration signal and a space rotation signal generated by a building structure under the action of an earthquake, fusing three types of dynamic information on a unified time axis to form a pressure shear response map of horizontal, vertical and rotation coupling, and determining a critical intersection point of horizontal and vertical composite stress in the pressure shear response map; Intercepting adjacent millisecond stress variation fragments by taking a critical intersection point as a center, carrying out time sequence screening on each fragment, extracting a stress sudden rise rule, condensing the rule into a vertical reverse pulse fingerprint, and generating a pulse anchor signal as a time reference of a subsequent control stage; setting an early trigger gate according to a pulse anchor signal at the front section of a time axis, and opening an energy unloading channel instantly before a vertical pulse arrives to construct an unloading window for releasing local stress in advance, so as to cut a superposition peak value of the decompression shears; Collecting a horizontal side movement signal and a vertical compression signal at the unloading window stage, performing time synchronization registration, and performing joint adjustment of negative delay traction and error frequency release to form a return towing rope for response and stabilization of a guide structure; And dynamical