Calculation method of floor vibration response under jump load

Abstract

The invention relates to a floor system vibration response computing method under jumping loads. The floor system vibration response computing method under the jumping loads includes the steps that (1) a large number of single jumping load curves are collected to form an actually measured jumping load data base; (2) actually measured jumping load data are normalized and then are input into a standard excitation system for time-procedure analysis, and an acceleration response spectrum of the actually measured jumping loads is obtained through computation; (3) classification is carried out with testers as objects, statistics and fitting are carried out with an outer envelope line of a tester response spectrum as a representative curve, and an integral piecewise function expression of a design response spectrum is built; (4), a power response of each order of vibration mode of a floor system structure under the jumping loads is computed through the design response spectrum, the power responses of all orders are combined according to an SRSS method, and floor system power responses are finally obtained. Compared with the prior art, the floor system vibration response computing method can estimate the acceleration response of the floor system structure under the jumping loads rapidly and accurately.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a method for calculating the vibration response of a floor under a jump load. Background technique [0002] With users' pursuit of the ultimate open building space and the application of high-strength materials, new construction technologies and advanced design methods, long-span floor structures are increasingly appearing in large public buildings such as stations and sports facilities. The vibration comfort of structures such as large-span floors caused by users' walking and jumping behaviors has increasingly been paid attention to in the design of large public buildings such as stations, gymnasiums, performing arts centers, and shopping centers. Dynamic response is an important indicator of comfort evaluation. In the design stage, due to the reality of frequent program changes, how to quickly and effectively calculate the dynamic response of long-span floor structu...

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Problems solved by technology

However, most of the previous research results are based on numerical models and limited experimental data, and the response spectrum curves given lack physical meaning, and there is also a lack of comparison with the measured structural response.

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