Low-rise building enclosure member wind disaster loss analysis method considering typhoon duration effect

Abstract

The invention discloses a low-rise building enclosure member wind disaster loss analysis method considering a typhoon duration effect. The method is used for evaluating wind-induced damage of a low-rise building enclosure structure. In the calculation process, determining the internal pressure for the current time step in combination with the house trepanning working condition; comparing the impact force of the throwing object with the impact bearing force of the throwing object to determine the damage to the window caused by the impact of the throwing object; comparing the load extreme value with the pressure bearing capacity to determine enclosure member damage caused by wind pressure; determining a new opening to update the internal pressure; carrying out damage analysis again until no new hole appears; entering the next time step until all the time steps in the typhoon duration are analyzed, and obtaining statistical values of the failure probability and the loss rate of each component in each time step. According to the invention, the time-holding effect of the typhoon is considered, meanwhile, factors such as non-Gaussian property, randomness and spatial correlation of the load of the enclosure component are considered, the loss condition in the typhoon is evaluated more practically, and the calculation efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the field of wind disaster assessment, in particular, it is a Monte Carlo simulation based on wind tunnel experimental data, a typhoon of a low-rise building enclosure structure considering three aspects of flying object impact, wind pressure damage and internal pressure change A method for estimating wind-induced loss over time. Background technique [0002] Residential houses, factories and other low-rise buildings are scattered all over the coastal areas. The damage to such buildings accounts for a very high proportion of the losses caused by the typhoon, seriously affecting the orderly development of local production and life. The damage to low-rise buildings under typhoon usually starts from the building envelope, with the building envelope such as doors, windows, roof cladding, and roof panels bearing the brunt [2] , leading to drastic changes in the internal pressure of the house, rainwater pouring in, and subsequent di...

AI Technical Summary

Problems solved by technology

Studies have shown that wind pressure values ​​based on load codes may underestimate the extreme value effect of wind pressure (e.g., St. Pierre L S, Kopp G A, Surry D, Ho T C E., The UWO contribution to the NIST aerodynamic database for wind loads on low buildings: Part 2. Comparison of data with wind load provisions, Journal of Wind Engineering and Industrial Aerodynamics, 93(1), 31–59, 2005)

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