Comfort degree control method of large-span foot bridge

Abstract

The invention relates to a comfort level control method for a large-span foot bridge, which belongs to the technical field of civil engineering, and comprises the following steps of: 1, equally dividing the foot bridge into a plurality of parts along the longitudinal bridge direction, arranging a corresponding damper and a vibration sensor on each part, detecting vibration by the plurality of vibration sensors, and respectively uploading vibration data to a control module; 2, after the control module receives the multiple pieces of vibration data, calculating the mean value and variance of the multiple pieces of vibration data, judging whether the variance is greater than a threshold value or not, if so, finding out the vibration data with the maximum dispersion degree, and executing the step 3, otherwise, executing the step 1; 3, the control module instructs the vibration data with the maximum dispersion degree to correspond to a damper of the foot bridge part to improve damping; the data source range is wide, and the adjusting effect is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of civil engineering, and particularly relates to a comfort control method for long-span pedestrian bridges. Background Art

[0002] Due to the low load-bearing requirements of pedestrian bridges, long-span bridge structures are usually adopted. However, the stability of long-span bridge structures is relatively weak. Especially in the middle section of the bridge, the movement of pedestrians and the vibration of the bridge body are prone to phenomena such as resonance and harmonic resonance, which will lead to problems such as a decrease in pedestrian comfort and panic. Moreover, frequent large-amplitude vibrations will also affect the service life of the bridge. It is necessary to analyze the vibration of the pedestrian bridge and adjust the damping of the pedestrian bridge according to the analysis results.

[0003] The existing analysis method is to establish a finite element model based on the structural design drawings, which is different from the vibration characteristics of the real structure. Because existing pedestrian bridges have been in operation for many years, different damages will occur to beam-column members, which will affect the stiffness of the structure. For this reason, Chinese Patent CN108376196A discloses a method for improving the comfort of existing pedestrian bridges. By measuring the acceleration of measuring points during operation with accelerometers, the finite element model is updated. On this basis, the number, parameters, and positions of mass-tuned dampers are optimized. Through the optimization analysis of the dampers, the comfort of existing pedestrian bridges is improved. The method of the present invention is simple to apply, can detect modal parameters under the operating state of the measured pedestrian bridge, does not require measuring the input excitation signal, has high measurement accuracy and good flexibility. On this basis, through the optimized design of TMD, the vibration reduction effect is good, and the comfort of the pedestrian bridge is effectively improved. The present invention updates the finite element model by simply measuring the acceleration of measuring points during operation with accelerometers, and on this basis, optimizes the number, parameters, and positions of mass-tuned dampers. This method can more effectively improve the comfort of existing pedestrian bridges.

[0004] However, in the above-mentioned solution, only by arranging three-axis accelerometers on the pedestrian bridge and collecting the acceleration time history of measuring points at different times, the damping of the pedestrian bridge cannot be adjusted according to other types of data. The data source is insufficient, and the matching degree between the adjustment effect and the actual demand is not high. For this reason, a comfort control method for long-span pedestrian bridges with a wide data source range and good adjustment effect is needed. Summary of the Invention

[0005] To solve the above problems existing in the prior art, the present invention provides a comfort control method for long-span pedestrian bridges, which has the characteristics of a wide data source range and good adjustment effect.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] A comfort control method for long-span pedestrian bridges includes the following steps:

[0008] Step 1: Divide the pedestrian bridge into several equal parts along the longitudinal bridge direction. Install corresponding dampers and vibration sensors in each part. The several vibration sensors detect vibrations and upload the vibration data to the control module respectively.

[0009] Step 2: After the control module receives the several vibration data, calculate the mean value and variance of the vibration data at several locations, and determine whether the variance is greater than the threshold. When the judgment result is yes, find the vibration data with the largest dispersion and execute Step 3; otherwise, execute Step 1.

[0010] Step 3: The control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion to increase the damping.

[0011] As a preferred technical solution of the present invention, in Step 1: The standard damping N0 is pre-input into the control module; Step 2 further includes: After the control module receives the several vibration data Zx (x = 1, 2,..., n), calculate the mean value Zj and variance Zf of the vibration data at several locations, determine whether Zf is greater than Z0. When the judgment result is yes, find the vibration data Zd with the largest dispersion and execute Step 3; Step 3 further includes: The control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration sensor corresponding to Zf to be increased to N, where N = [1 + (Zj - Zd) / Zj] × N0.

[0012] As a preferred technical solution of the present invention, Step 1 further includes: The span of the pedestrian bridge is input into the control module. When the span exceeds the threshold, the control module increases the damping of several dampers; when the span is lower than the threshold, the control module decreases the damping of several dampers.

[0013] As a preferred technical solution of the present invention, Step 1 further includes: The span K of the pedestrian bridge is input into the control module. The control module adjusts the standard damping to N0×A1, where A1 = K / K0×c.

[0014] As a preferred technical solution of the present invention, Step 1 further includes: Arrange several human flow sensors along the longitudinal bridge direction. The several human flow sensors are used to detect the human flow of the pedestrian bridge and upload it to the control module. When the control module determines that the human flow is greater than the threshold, the control module adjusts the standard damping upward.

[0015] As a preferred technical solution of the present invention, Step 1 further includes: The several human flow sensors are used to detect the human flow L of the pedestrian bridge and upload it to the control module. The control module adjusts the standard damping to N0×A1×A2, where A2 = L0 / L×d.

[0016] As a preferred technical solution of the present invention, the first step further includes: a plurality of pedestrian flow sensors for detecting the concentrated points of the pedestrian flow on the pedestrian bridge and uploading them to the control module. The control module determines whether the distance between the concentrated point of the pedestrian flow and the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion exceeds a threshold. When the judgment result is yes, the control module reduces the damping of the damper of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion of the control module instruction, and increases the damping of the dampers of the two sides of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion.

[0017] As a preferred technical solution of the present invention, the third step further includes: the control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration sensor corresponding to Zf to be adjusted to N×A3, and adjusts the damping of the dampers of the two sides of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion to N0×1 / A3, where A3 = 1+(J - 0.3K) / K and J≥0.3K.

[0018] The beneficial effects of the present invention are as follows:

[0019] (1) By introducing the variance of the vibrations of several longitudinal parts of the pedestrian bridge as a reference and determining whether the variance is greater than the threshold, the vibration data with the largest dispersion is found, and the damper of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion is instructed to adjust the damping, so as to complete the targeted shock absorption of the bridge deck part with more concentrated vibrations when the vibrations are uneven everywhere, making the matching degree between the adjustment effect and the actual demand higher and improving the adjustment effect;

[0020] (2) By enabling the control module to increase the damping of several dampers when the span of the pedestrian bridge exceeds the threshold and decrease the damping of several dampers when the span is lower than the threshold, when the span is larger and the amplitude caused by vibrations is greater, the damping is further increased, improving the matching degree between the adjustment effect and the actual environment and improving the adjustment effect;

[0021] (3) By using the pedestrian flow sensor to detect the pedestrian flow on the pedestrian bridge, when the control module determines that the pedestrian flow is greater than the threshold, the control module adjusts the standard damping upward, so as to complete the improvement of the damping and thus the adjustment effect when the pedestrian flow is large and the probability of the crowd panicking due to vibrations is high;

[0022] (4) By enabling the control module to determine whether the distance between the concentrated point of the pedestrian flow and the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion exceeds the threshold, when the judgment result is yes, the damping of the damper of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion is increased, and the damping of the dampers of the two sides of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion is decreased, so as to complete the situation where the part subjected to concentrated vibrations is far from the crowd and the damping for shock absorption is small, which may cause the two relatively far parts of the bridge to be simultaneously affected by a relatively large degree of floating, affecting the structural strength, reducing the concentration degree of the floating space, and avoiding damage to the pedestrian bridge. Brief Description of the Drawings

[0023] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is the flowchart of the steps of the present invention. Detailed Embodiment

[0025] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, with reference to the accompanying drawings and preferred embodiments, elaborate in detail on the specific embodiments, structures, features and effects of the present invention.

[0026] Please refer to Figure 1 , a comfort control method for a long-span pedestrian bridge, comprising the following steps:

[0027] Step 1: Divide the pedestrian bridge into several equal parts along the longitudinal bridge direction, and set corresponding dampers and vibration sensors in each part. The several vibration sensors detect vibrations and upload the vibration data to the control module respectively;

[0028] The pedestrian bridge includes a support structure for supporting the bridge deck. Each damper is arranged between the support structure and the bridge deck, and partially plays the role of supporting the bridge deck. Most of the pressure on the bridge deck acts on the support structure, and the rest acts on the damper. When the bridge deck vibrates, some dampers that play the role of supporting the bridge deck absorb vibrations using their own characteristics. And when the damping of the damper is small, the floating space is larger under the same external force, and the absorption effect on vibrations is better. When the damping of the damper is large, the absorption effect on vibrations is lower, improving the support effect;

[0029] Specifically, divide the main bridge body part of the pedestrian bridge into parts every two meters, and set corresponding dampers in each part. The dampers are arranged upward. The several vibration sensors upload the vibration data to the control module every second. At this time, for each part, the vibration sensor, the vibration data uploaded by the vibration sensor, the bridge deck part and the damper correspond one by one;

[0030] Whenever the control module receives several vibration data, execute Step 2;

[0031] Step 2: After the control module receives several vibration data, calculate the mean and variance of the several vibration data, and determine whether the variance is greater than the threshold. When the judgment result is yes, find the vibration data with the largest dispersion degree, and execute Step 3. Otherwise, return to Step 1;

[0032] Specifically, step one: The control module is pre-input with a standard damping N0; step two further includes: After the control module receives a number of vibration data Zx (where x is the vibration sensor number, x = 1, 2,..., n), it calculates the mean value Zj and variance Zf of the vibration data at several locations, and determines whether Zf is greater than Z0. When the determination result is yes, it finds the vibration data with the largest difference from Zj and the largest dispersion among the vibration data Zx, denoted as Zd, and executes step three; step three further includes: The control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration sensor corresponding to Zd to be adjusted to N, where N = [1 + (Zj - Zd) / Zj] × N0, and Z0 is the pre-input variance threshold;

[0033] In step one, the control module pre-numbers a number of vibration sensors and dampers as x, x = 1, 2,..., n. The vibration sensors and dampers in the same part of the pedestrian bridge have the same number. When the control module determines that the dispersion of a certain vibration data is large, it can find the corresponding damper according to the number; step three: The control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion to increase the damping;

[0034] When the variance is large, it means that the difference between a number of vibration data is large. At this time, it means that a part of the pedestrian overpass is subjected to concentrated vibration, and targeted shock absorption needs to be carried out. By reducing the damping, the shock absorption effect can be improved. At this time, in step three, the control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration sensor corresponding to Zd to be adjusted to N, where N = [1 + (Zj - Zd) / Zj] × N0, and the damper of the part of the pedestrian bridge corresponding to the corresponding vibration sensor is increased;

[0035] When the vibration data Zd with the largest discrete value is large and exceeds the mean value Zj by a large margin, it is necessary to reduce the damping to improve the shock absorption effect of this part. At this time, the value of (Zj - Zd) / Z0 is negative and is much less than 0, and the value of N = [1 + (Zj - Zd) / Zj] × N0 is small and is much less than N0. When the control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration sensor corresponding to Zd to be adjusted to N, the targeted shock absorption of the bridge deck part with more concentrated vibration is completed;

[0036] By introducing the variance of the vibrations of several parts of the pedestrian bridge in the longitudinal direction as a reference, and determining whether the variance is greater than the threshold value, finding the vibration data with the largest dispersion, and instructing the damper of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion to increase the damping, the targeted shock absorption of the bridge deck part with more concentrated vibration is completed when the vibrations at each location are uneven, making the coordination between the adjustment effect and the actual demand higher and improving the adjustment effect;

[0037] Optionally, after the control module receives a number of vibration data in step two, according to the vibration intensity data uploaded by each vibration sensor, a function Zx = Fx(t) of the change of the vibration intensity Zx data of each vibration sensor with time is generated, where x is the vibration sensor number, x = 1, 2,..., n. Subsequently, the control module calculates the time integral Jx of the function Zx = Fx(t) of the change of a number of vibration intensity Zx data with time within a preset time period. Among them, the operator has pre-entered the length y of the preset time period, tz is the current time, tz0 = tz - y, and at this time [tz0, tz] forms the preset time period.

[0038] Subsequently, the control module overlaps the graphs formed by integrating a number of functions, calculates the area Sd of the overlapping part of a number of integral graphs, then calculates the absolute value Sc of the difference between the area of the graph formed by integrating the function Fx(t) corresponding to Zd and the area of the overlapping part, and calculates the value of A4 = 1 + (Sd - Sc) / Sd, where Sd ≤ Sc ≤ 1.5Sd. Subsequently, the control module instructs the damper of the corresponding part of the footbridge of the vibration sensor corresponding to Zd to be corrected to N × A4.

[0039] When Sc is large, it means that the function shape of the vibration data Zd is quite different from that of the other vibration data. At this time, it means that the corresponding bridge deck part of the vibration sensor uploading Zd is not only subjected to concentrated vibration at the uploading time point, but also subjected to concentrated vibration for a long time. It is necessary to further ensure the damping effect and reduce the damping. At this time, the value of A4 = 1 + (Sd - Sc) / Sd is small. When the control module instructs the damper of the corresponding part of the footbridge of the vibration sensor corresponding to Zd to be corrected to N × A4.

[0040] By enabling the control module to calculate the time integral Jx of the function Zx = Fx(t) of the change of a number of vibration intensity Zx data within a preset time period, calculate the area Sd of the overlapping part of a number of integral graphs, then calculate the absolute value Sc of the difference between the area of the graph formed by integrating the function Fx(t) corresponding to Zd and the area of the overlapping part, and calculate the value of A4 = 1 + (Sd - Sc) / Sd, where Sd ≤ Sc ≤ 1.5Sd. Subsequently, the control module instructs the damper of the corresponding part of the footbridge of the vibration sensor corresponding to Zd to be corrected to N × A4, when the corresponding bridge deck part of the vibration sensor uploading Zd is subjected to concentrated vibration for a long time and it is necessary to further ensure the damping effect, the damping effect of this part of the bridge deck is improved.

[0041] Step one also includes: entering the span of the footbridge in the control module, and the control module increases the damping of a number of dampers when the span exceeds the threshold, and decreases the damping of a number of dampers when the span is lower than the threshold.

[0042] Specifically, when the span is large, the amplitude caused by vibration is greater. At this time, it is necessary to control the floating space of the damper and increase the shock absorption damping. When the span is small, the amplitude caused by vibration is smaller. When the shock absorption damping is too large, it will cause the vibration with a small amplitude to not be eliminated. At this time, it is necessary to reduce the shock absorption damping

[0043] Specifically, the span K of the pedestrian bridge is input into the control module, and the control module adjusts the standard damping to N0×A1, where A1 = K / K0×c;

[0044] When K is large, it means that it is necessary to increase the shock absorption damping. At this time, the value of A1 = K / K0×c is large. When the control module adjusts the standard damping to N0×A1, it completes the increase of the overall shock absorption damping when the span is large;

[0045] When K is small, it means that it is necessary to reduce the shock absorption damping. At this time, the value of A1 = K / K0×c is small. When the control module adjusts the standard damping to N0×A1, it completes the reduction of the overall shock absorption damping when the span is small;

[0046] By making the control module increase the damping of several dampers when the span of the pedestrian bridge exceeds the threshold and decrease the damping of several dampers when the span is below the threshold, when the span is large and the amplitude caused by vibration is greater, the damping is further increased, improving the coordination between the adjustment effect and the real environment and enhancing the adjustment effect;

[0047] When the flow of people is large, it means that the probability of various vibrations causing panic among pedestrians is high. At this time, it is necessary to specifically handle small-amplitude vibrations, that is, reduce the shock absorption damping. When the flow of people is small, there is no need to specifically handle small-amplitude vibrations, and there is no need to reduce the shock absorption damping at this time. Therefore, step one further includes: arranging several flow sensors for people along the longitudinal direction of the bridge. The several flow sensors for people are used to detect the flow of people on the pedestrian bridge and upload it to the control module. When the control module determines that the flow of people is greater than the threshold, the control module adjusts the standard damping upward;

[0048] Specifically, step one further includes: several flow sensors for people are used to detect the flow of people L on the pedestrian bridge and upload it to the control module. The control module adjusts the standard damping to N0×A1×A2, where A2 = L0 / L×d;

[0049] By using the flow sensors for people to detect the flow of people on the pedestrian bridge, when the control module determines that the flow of people is greater than the threshold, the control module adjusts the standard damping upward, completing the increase of the damping and thus enhancing the adjustment effect when the flow of people is large and the probability of vibration causing panic among the crowd is high;

[0050] When the distribution of the pedestrian flow on the footbridge is uneven, the area with a relatively dense crowd exerts a greater pressure on the bridge. When the part subjected to concentrated vibration is far from the crowd and the damping of the shock absorber is small, there is a probability that two relatively distant parts of the bridge will be simultaneously subjected to a relatively large degree of floating, affecting the structural strength. Therefore, it is necessary to upwardly adjust the damping of the shock-absorbing structure near the part with the largest vibration amplitude, reduce the floating space of the damper, and at the same time increase the floating space of the dampers in the adjacent parts of this part, so as to prevent the floating space of the damper from being concentrated only at one point on the bridge deck;

[0051] To this end, Step 1 further includes: a number of pedestrian flow sensors for detecting the concentrated points of the pedestrian flow on the footbridge and uploading them to the control module. Step 3 further includes: the control module determines whether the distance between the concentrated point of the pedestrian flow and the part of the footbridge corresponding to the vibration data with the largest dispersion exceeds a threshold value. When the judgment result is yes, the control module instructs the damper of the part of the footbridge corresponding to the vibration data with the largest dispersion to increase the damping and reduces the damping of the dampers in the adjacent parts of the part of the footbridge corresponding to the vibration data with the largest dispersion;

[0052] Specifically, Step 3 further includes: the control module determines whether the distance J between the concentrated point of the pedestrian flow and the part of the footbridge corresponding to the vibration data with the largest dispersion exceeds a threshold value. When the judgment result is yes, the control module adjusts the damper of the part of the footbridge corresponding to the vibration sensor of Zd to N0×A3, and adjusts the damping of the dampers on both sides of the part of the footbridge corresponding to the vibration sensor of Zd to N0×1 / A3, where A3 = 1+(J - 0.3K) / K and J≥0.3K;

[0053] When the value of J is large, it means that the part subjected to concentrated vibration is far from the crowd. At this time, it is necessary to downwardly adjust the damping of the shock-absorbing structure near the part with the largest vibration amplitude, increase the floating space of the damper, and at the same time increase the floating space of the adjacent parts of this part, so as to prevent the floating space of the damper from being concentrated only at one point on the bridge deck. At this time, the value of A3 = 1+(J - 0.3K) / K is large, and the value of N×1 / A3 is small. When the control module adjusts the damper of the part of the footbridge corresponding to the vibration sensor of Zd to N0×1 / A3, the floating space of the part subjected to concentrated vibration is reduced;

[0054] At the same time, it is necessary to increase the floating space of the dampers in the adjacent parts of this part and reduce the damping. At this time, the value of 1 / A3 is small, and the control module adjusts the damping of the dampers on both sides of the part of the footbridge corresponding to the vibration sensor of Zd to N0×1 / A3, completing the reduction of the damping;

[0055] By enabling the control module to determine whether the distance between the crowded point and the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion exceeds a threshold, when the judgment result is yes, increase the damping of the damper of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion, and reduce the damping of the dampers on both sides of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion, to complete the situation where the part suffering from concentrated vibration is far from the crowd and has a small damping for shock absorption, which may cause the two relatively far parts of the bridge to be simultaneously affected by a relatively large floating, affecting the structural strength, reducing the concentration degree of the floating space, and avoiding damage to the pedestrian bridge.

[0056] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications into equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A comfort control method for a long-span pedestrian bridge, characterized in that: It includes the following steps: Step 1: Divide the pedestrian bridge into several equal parts along the longitudinal direction of the bridge, and set corresponding dampers and vibration sensors in each part. The several vibration sensors detect vibrations and upload the vibration data to the control module respectively; Step 2: After the control module receives the several vibration data, calculate the mean and variance of the vibration data at several locations, and determine whether the variance is greater than the threshold. When the judgment result is yes, find the vibration data with the largest dispersion, and execute Step 3; otherwise, execute Step 1; Step 3: The control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion to reduce the damping.

2. The comfort control method of a long-span pedestrian bridge according to claim 1, characterized in that: The said Step 1: The control module is pre-input with a standard damping N0; the said Step 2 further includes: after the control module receives several vibration data Zx (x = 1, 2,..., n), calculate the mean Zj and variance Zf of the vibration data at several locations, and determine whether Zf is greater than Z0. When the judgment result is yes, find the vibration data Zd with the largest dispersion, and execute Step 3; the said Step 3 further includes: the control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration sensor corresponding to Zd to be adjusted to N, where N = [1 + (Zj - Zd) / Zj] × N0, and Z0 is the pre-input variance threshold.

3. The comfort control method for a long-span pedestrian bridge according to claim 2, characterized in that: The said Step 1 further includes: input the span of the pedestrian bridge into the control module. When the span exceeds the threshold, the control module increases the damping of several dampers; when the span is lower than the threshold, the control module reduces the damping of several dampers.

4. The comfort control method for a long-span pedestrian bridge according to claim 3, characterized in that: The said Step 1 further includes: input the span K of the pedestrian bridge into the control module, and the control module adjusts the standard damping to N0 × A1, where A1 = K / K0 × c.

5. The comfort control method for a long-span pedestrian bridge according to claim 2, characterized in that: The said Step 1 further includes: arrange several human flow sensors along the longitudinal direction of the bridge. The several human flow sensors are used to detect the human flow of the pedestrian bridge and upload it to the control module. When the control module determines that the human flow is greater than the threshold, the control module adjusts the standard damping upward.

6. The comfort control method of a long-span pedestrian bridge according to claim 5, characterized in that: The said Step 1 further includes: several human flow sensors are used to detect the human flow L of the pedestrian bridge and upload it to the control module, and the control module adjusts the standard damping to N0 × A1 × A2, where A2 = L0 / L × d.

7. The comfort control method of a long-span pedestrian bridge according to claim 6, wherein: The said Step 1 further includes: several human flow sensors are used to detect the human flow concentration point of the pedestrian bridge and upload it to the control module. The said Step 3 further includes: the control module determines whether the distance between the human flow concentration point and the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion exceeds the threshold. When the judgment result is yes, the control module instructs the damper of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion to increase the damping, and reduces the damping of the damper of the adjacent part of the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion.

8. A comfort control method for a long-span pedestrian bridge according to claim 7, characterized in that: The first step further includes: a plurality of pedestrian flow sensors for detecting the concentrated points of the pedestrian flow on the pedestrian bridge and uploading them to the control module. The third step further includes: the control module determines whether the distance J between the concentrated point of the pedestrian flow and the part of the pedestrian bridge corresponding to the vibration data with the largest dispersion exceeds the threshold. When the judgment result is yes, the control module adjusts the damper of the part of the pedestrian bridge corresponding to the vibration sensor of Zd to N0×A3, and adjusts the damping of the dampers on both sides of the part of the pedestrian bridge corresponding to the vibration sensor of Zd to N0×1 / A3, where A3 = 1+(J - 0.3K) / K, and J≥0.3K.

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