Tests for correlation and modeling of individual 3-D continuous walking load
ZHAO Dingsu1, CHEN Jun1,2
1. College of Civil Engineering, Tongji University, Shanghai 200092, China;
2. State Key Lab of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
Abstract：A large-span flexible structure is easy to have the vibration serviceability problem under pedestrian walking load. Studying characteristics of walking load and establishing a reasonable load model are prerequisites for accurate prediction of human-induced structural vibration. Here, firstly, the measured time histories of individual 3-D continuous walking load on rigid surfaces were collected. Correlation analysis showed that the correlation among three components of human walking load is weaker. Accordingly, Fourier series models for three components were built, respectively based on the assumption of periodicity. The function relations among model parameters, walking frequency and walking speed were derived using the statistical analysis of measured data. Compared with existing load models in a single direction, the results showed that there are certain differences among different models; the proposed load models provide a reference for human-induced vibration analysis of engineering structures.
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