Experimental Method for Dynamic Response of Floor Structures Under Pedestrian Loads Based on Design Response Spectrum

Abstract

The invention relates to a design response spectrum based floor structure dynamic response testing method under walking loading. The design response spectrum based floor structure dynamic response testing method under the walking loading comprises (1) collecting a large amount of single-people walking load curves and forming into an actual measurement loading database; (2) inputting the actual measurement loading database to a standard excitation system after the actual measurement walking loading data is performed on normalization processing to be performed on time-procedure analysis and calculating to obtain an acceleration response spectrum of the actual measurement walking loading; (3) classifying with testers as objects, performing statics and fitting with an external envelope line of a tester response spectrum serving as a representative curve and constructing a complete piecewise function expression for the design response spectrum; (4) calculating dynamic response of every order vibration mode of the floor structure under the walking loading, combining the dynamic responses of the orders through a square and square root method and finally obtaining the floor dynamic response. Compared with the prior art, the design response spectrum based floor structure dynamic response testing method under the walking loading can accurately estimate the acceleration response of the floor structure under the walking loading.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a design response spectrum-based test method for dynamic response of floor structures under pedestrian loads. 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 res...

AI Technical Summary

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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