Simulation on the Stroke Protection Distance of Tall Buildings to Surrounding Buildings

Tan Yongbo; Chen Zhilu; Zhang Dongdong; Shi Zheng; Guo Xiufeng

doi:10.11898/1001-7313.20160413

Vol.27, NO.4, 2016

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Article Navigation > Journal of Applied Meteorological Science > 2016 > 27(4): 498-505

Tan Yongbo, Chen Zhilu, Zhang Dongdong, et al. Simulation on the stroke protection distance of tall buildings to surrounding buildings. J Appl Meteor Sci, 2016, 27(4): 498-505. DOI: 10.11898/1001-7313.20160413.

Citation:

Tan Yongbo, Chen Zhilu, Zhang Dongdong, et al. Simulation on the stroke protection distance of tall buildings to surrounding buildings. J Appl Meteor Sci, 2016, 27(4): 498-505. DOI: 10.11898/1001-7313.20160413.

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Simulation on the Stroke Protection Distance of Tall Buildings to Surrounding Buildings

DOI: 10.11898/1001-7313.20160413

1.
Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044
2.
Lightning Protection Center of Tianjin, Tianjin 300074

Received Date: 2015-11-15
Rev Recd Date: 2016-02-18
Publish Date: 2016-07-31

Abstract

Abstract

Lightning is a kind of strong discharge phenomena in the atmosphere. It has a great impact on human living space especially cloud-to-ground lightning, making it widely concerned. Through a large number of lightning observation, the tip and the corner of tall buildings are usually striken rather than the relative low buildings and ground. The tall building can make surrounding atmospheric electric field produce a strong distortion effect, so that the tip and the corner of tall buildings trigger upward leader easier, connected with the downward leader. Numerous studies on single building attachment process are carried out, while in real urban environment, buildings are not isolated, and therefore, shielding effects between multiple buildings and the relationship between stroke protection distance of building and the related characteristic parameters of buildings are discussed.On the basis of the existing parameterization scheme of leader attachment process, a region near the ground is selected as study area, by changing spatial forms of lightning while keeping the other basic parameters constant. A series of lightning simulation experiment is conducted in the context of distribution of the same buildings. Results show that under the distribution of multiple buildings, the tall building is more intense in the environmental electric field distortion than the low building, upward leader is easier to be triggered. Meanwhile, the tall building has a shielding effect to the low building, and has a critical value of protection distance of the effect of low building, when the distance between tall building and low building is under the critical, the low building is safe from stroke, otherwise, the rate of low building being stroke has a upward trend. In addition, the result comes out that the critical value of protection distance and the height of tall building is positively correlated, and the height of low building is negatively correlated. Finally, the relationship between the critical value of protection distance and the building height is fitted, providing a reference value for lightning protection designing work.
- multiple buildings;
- stroke protection distance;
- attachment process;
- random parameter

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References(33)

Figures and Tables

Fig. 1 Sketch of simulation structure

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图 2 闪电发展形态

(a) 随机性参数为14，(b) 随机性参数为56，(c) 随机性参数为92

Fig. 2 Lightning progression forms

(a) random parameter is 14, (b) random parameter is 56, (c) random parameter is 92

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Fig. 3 Plot of potential distribution (unit:kV)

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Fig. 4 Changes of lightning frequency of low buildings with distance between buildings

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Fig. 5 Changes of the critical value of protection distance S_L with the height of low building H₂ under conditions of different height of tall buildings

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Fig. 6 Changes of the critical value of protection distance S_L with the height of tall building H₁ under conditions of different height of low buildings

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Table 1 Constant values of fitting equation of S_L and H₂ under conditions of different height of tall buildings

H₁/m	a	b	R²
170	209.3235	-1.4098	0.987
190	223.5980	-1.3079	0.968
210	307.70	-1.6137	0.966

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Table 2 Constant values of fitting equation of S_L and H₁ under conditions of different height of low buildings

H₂/m	a	b	R²
90	-143.102	1.426	0.947
110	-173.789	1.471	0.964
130	-245.392	1.727	0.947

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