Response spectrum method used for analyzing floor system vibration response under bounce load

Abstract

The invention relates to a response spectrum method used for analyzing a floor system vibration response under the bounce load. The method comprises the steps that (1), a large number of curved lines of the single bounce load is connected to form an actual measured bounce load data base; (2), actual measured bounce load data are normalized and input into a standard excitation system, time-procedure analysis is carried out on the data, and an acceleration response spectrum of the actual measured bounce load is obtained through calculation of the data; (3), testers as objects are classified, outscourcing lines of response spectrums of the testers serve as the representative curved lines and are counted and fitted to construct integral piecewise function expressions of the designed response spectrums; (4), by means of the designed response spectrums, a value of a power response of each vibration mode of a floor system structure under the bounce load is calculated, combination is carried out according to the combined mode of a square method and a square root or complete square method, and finally the power response of the floor system is obtained. Compared with the prior art, the method can accurately and fast estimate the acceleration response of the floor system structure under the bounce load.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a response spectrum method for analyzing the vibration response of a floor under a bounce load. Background technique [0002] With the continuous development of social economy, new structural forms and high-strength and lightweight materials are widely used in public buildings, and the span of floor structures is getting larger and larger. On the other hand, the increasingly rich cultural life has made participation in popular concerts and large-scale sports activities gradually popular, and these activities will be accompanied by rhythmic movements of the crowd. The base frequency of the long-span floor is low and the damping is small. When the frequency of the rhythmic movement of the crowd is equal to the natural vibration frequency of the floor, it is easy to cause resonance of the floor system, which may cause excessive vibration of the floor. If it exceeds the r...

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Problems solved by technology

However, most of the studies on the acceleration response spectrum of floors are aimed at walking loads, and there is no public report on the acceleration response spectrum under bounce loads.

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