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Abstract: The purpose of this article is to investigate the enhancement of vitality in Suzhou's ancient neighborhoods based on POI data and spatial syntax tools. The study relies mainly on big data analysis to examine the distribution of various functional elements of the study object, and utilizes spatial syntax tools to explore the inherent connections between the study object and the urban pattern, in order to find key points for optimizing the vitality of the neighborhoods and propose corresponding strategies. The study takes the area north of Nanyuan River in Block 49 of Suzhou's ancient city as an example, and uses POI data within a 300-meter living circle around the site for kernel density and correlation analysis. It is found that the industries around the site do not have enough radiation range and limited accessibility to the site's interior. In addition, using spatial syntax analysis, the study further discovers that the site has low aggregation and traversability, while the accessibility of the central axis and north-south axis channels in the site is relatively high, and the visual situation is also good. Finally, based on the above analysis results, comprehensive optimization and updating strategies are proposed for the site to enhance its internal vitality. In conclusion, it is hoped that this research can provide some research experience and case references for the study of enhancing the vitality of traditional ancient neighborhoods in China.Abstract: The purpose of this article is to investigate the enhancement of vitality in Suzhou's ancient neighborhoods based on POI data and spatial syntax tools. The study relies mainly on big data analysis to examine the distribution of various functional elements of the study object, and utilizes spatial syntax tools to explore the inherent connections bet...Learn More
Abstract: The linear curve distribution of the beam may have favorable or proportional effects on the curved beam bridge. In order to clarify the effect law of curvature on the wind vibration response of the bridge, this paper combines wind tunnel tests and numerical simulations of wind vibration of curved beam bridge. The wind vibration response of curved girder bridge is obtained through segmental model wind tunnel test, finite element model of the dam is established and CFD numerical calculation is performed by ICEM software, and the accuracy of finite element modeling is verified by comparing the statistical values of numerical calculation results and test results. Then, we analyze the influence law of five curvature cases and five wind speed conditions on the wind vibration response of the curved girder bridge, finally, analyze the influence law of the presence of the dam on the wind vibration response of the curved beam bridge at the same curvature. The results show that the mean displacement and root mean square of the bridge tend to increase and then decrease with the increase of curvature; the most unfavorable curvature of the bridge displacement is 0.0024; with the increase of curvature, the higher order modal resonance response of the bridge is excited and the bandwidth of the higher order modal resonance frequency gradually increases; The presence of dams reduces the average wind speed; As the wind speed increases, the average displacement and root mean square of the bridge also increase; When the curvature of the curved girder bridge is small, the presence of the dam will significantly reduce the displacement of the curved girder bridge under wind load, but when the curvature increases to a certain degree, this tendency is significantly weakened.Abstract: The linear curve distribution of the beam may have favorable or proportional effects on the curved beam bridge. In order to clarify the effect law of curvature on the wind vibration response of the bridge, this paper combines wind tunnel tests and numerical simulations of wind vibration of curved beam bridge. The wind vibration response of curved g...Learn More
Abstract: Wind load will cause significant vibration of landscape towers, thus bringing strong discomfort to visitors. In order to control structural vibration and reduce this discomfort, in order to study the wind-induced vibration control ability of tuned mass inertial damper (TMDI) on landscape towers, the motion equation of tuned mass damper under wind load is deduced, and the accelerated response spectrum is derived by frequency domain analysis method. The TMDI parameters are optimized by using CBO optimization algorithm to minimize the acceleration of TMDI system of landscape tower, and discussing the ability of TMDI to control wind-induced vibration of structures. The structure is shown as follows: Acceleration response will vary with mass ratio, apparent mass ratio, damping ratio, and frequency ratio. In this paper, dimensionless acceleration is the ratio of acceleration amplitude of the platform equipped with TMDI to that of the platform without TMDI. Within the recommended interval, the control effect of acceleration amplitude is between 16.55% and 26.48%. The acceleration amplitude at the platform still meets the acceleration limit in the specification under the design wind speed, and the vibration reduction of the bent-torsion column - spiral beam landscape tower is realized. The results show that TMDI can effectively control the acceleration response at landscape tower platform.Abstract: Wind load will cause significant vibration of landscape towers, thus bringing strong discomfort to visitors. In order to control structural vibration and reduce this discomfort, in order to study the wind-induced vibration control ability of tuned mass inertial damper (TMDI) on landscape towers, the motion equation of tuned mass damper under wind l...Learn More
Abstract: As a traditional residence in the Jiangnan region of China, Suzhou houses are still insufficient for energy-saving transformation and utilization of these traditional residential buildings due to a large number and a long period of construction, poor indoor comfort and high building energy consumption. As a part of the façade of the building, the window-to-wall ratio not only affects the natural lighting of the interior, but also relates to the energy consumption of the building. This paper takes the south-facing window of Suzhou Guoyunlou Exhibition Hall as the research object, and uses the parametric simulation tool ladybug to discuss the effects of the two types of windows on building energy consumption and natural lighting under different window-to-wall ratios. The results show that: 1) the energy consumption of the window of shape 2 is slightly greater than that of shape 1, and the window-to-wall ratio of the two is close to 50%, the change of indoor energy consumption tends to remain unchanged or decrease; 2) The windows of the two shapes have reached the lighting requirements when the window-to-wall ratio reaches 25%. Considering that the original house is used as a showroom after renovation, there is no special lighting demand, and the south-facing window wall is 25% more appropriate.Abstract: As a traditional residence in the Jiangnan region of China, Suzhou houses are still insufficient for energy-saving transformation and utilization of these traditional residential buildings due to a large number and a long period of construction, poor indoor comfort and high building energy consumption. As a part of the façade of the building, the w...Learn More
Abstract: Most performance indices of civil engineering structures have uncertainty in actual values, which affect the effect of structural damage detection. For this reason, based on the natural frequency index, a method using small sample analysis to obtain the interval representative value of the frequency was proposed for damage detection. Firstly, a special study on the small sample analysis was carried out: the small sample analysis methods related to normal distribution and uniform distribution were explained through examples and then the specific method of obtaining interval parameter values was clarified. Subsequently, two specific damage detection methods based on the interval representative value of the frequency were proposed: (1) Taking the median of the interval as the frequency representative value, which can fully take into account the habit of deterministic operation and apply conventional damage identification methods directly; (2) Directly taking interval values as frequency representative values, which can distinguish whether damage occurs directly by the sensitivity of interval type frequency values to parameter changes. Further research is needed to identify the location and degree of damage. Finally, two large-scale bridges (Qingdao Cangkou Waterway Bridge and Shanghai Nanpu Bridge) were combined to provide application examples for explanation.Abstract: Most performance indices of civil engineering structures have uncertainty in actual values, which affect the effect of structural damage detection. For this reason, based on the natural frequency index, a method using small sample analysis to obtain the interval representative value of the frequency was proposed for damage detection. Firstly, a spe...Learn More
