Absorbed blasting vibration energy comfort evaluation method of multistorey building

Abstract

The invention discloses an absorbed blasting vibration energy comfort evaluation method of a multistorey building. The absorbed blasting vibration energy comfort evaluation method comprises the following steps: establishing an absorbed blasting vibration energy index, evaluating human body vibration characteristics by energy transfer and conversion, and analyzing blasting vibration energy frequency band representation by a power spectrum density value to obtain blasting vibration adsorption energy values in different frequency band ranges; analyzing the dynamic response characteristics of a building; obtaining the displacement amplification coefficient of a structural body; according to influence on the building by blasting vibration energy composition and different pieces of frequency band energy, carrying out frequency weighting on the vibration energy, and calling an energy weighting value as the absorbed blasting vibration energy of building frequency weighting; and multiplying each piece of frequency band energy by a human body vibration response weighting coefficient to obtain the absorbed blasting vibration energy of human body frequency weighting. By use of the absorbed blasting vibration energy comfort evaluation method, the magnitude and the frequency composition of total blasting vibration energy received by the human bodies in different floors of the building can be accurately calculated so as to achieve a purpose that blasting vibration energy comfort is accurately and objectively evaluated.

Description

technical field [0001] The invention relates to the field of blasting vibration energy analysis, in particular to a comfort evaluation method for absorbing blasting vibration energy of a multi-storey building. Background technique [0002] With the increasing number of water conservancy, railway, highway and urban construction projects, there are more and more blasting operations in adjacent crowd-inhabited areas, and the blasting earthquake effect induced by blasting operations has caused more and more residents' complaints, complaints and civil disputes . A large number of investigations and studies have shown that: "People are highly sensitive to the vibrations caused by ground and air disturbances caused by blasting", and the degree of sensitivity of people is about 10 times that of buildings (structures). The vibration intensity that satisfies the requirements of vibration comfort is less than the safety limit for structural damage, and this kind of dissatisfaction and...

AI Technical Summary

Problems solved by technology

The calculation process of the fourth power vibration dose value VDV is relatively complicated and easily introduces calculation errors

[0006] 1) At present, most of the indicators for evaluating the impact of blasting vibration on the human body use peak vibration velocity, acceleration and displacement, etc., and the single threshold evaluation indicator does not consider the influence of factors such as vibration frequency and duration

Domestic researchers try to use the vibration dose VDV evaluation index, which can take into account the influence of the three elements of blasting vibration at the same time, but the calculation of the VDV index must first obtain a reliable blasting vibration acceleration, and most blasting vibration monitoring is to monitor the vibration speed, which is objectively restricted. use of an indicator

Moreover, the VDV index cannot consider the influence of the vibration characteristics of the human body itself and the building

[0007] 2) Traditional single-threshold evaluation indicators such as peak vibration velocity, as well as VDV and KB Fmax The impact of multi-storey buildings on the blasting vibration energy and frequency components cannot be considered, so the traditional evaluation indicators are obviously insufficient for the evaluation of human comfort in buildings, especially in multi-storey buildings.

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