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To investigate the distributing disciplinarian of ground motion parameters on the earth fissure site during strong earthquakes, a series of shaking table tests were designed and conducted based on 1:15 scaled models. Test results showed significant differences in the ground motion parameters (including ground motion intensity indices, spectrum characteristics and strong motion duration) between the hanging-wall and footwall caused by the earth fissure. Acceleration response, displacement response and Arias Intensity response on both sides of earth fissure indicated that the earth fissure site on the hanging-wall was destroyed more seriously. The distributing disciplinarian of amplification factors showed clear "hanging-wall and footwall effects", which were more remarkable nearby the fissure zones. The low-frequency component of the seismic wave was richer after selectively filtering in the soil medium. By comparing the predominant period and mean period of the hanging-wall and footwall, it was found that vibration frequency on the hanging-wall was greater than that on the footwall. Minimum values of strong motion duration were recorded on the hanging-wall close to the fissure and increased from the fissure to both sides. [ABSTRACT FROM AUTHOR]

An accurate evaluation of structural damage is essential to performance-based seismic design for the structure across the earth fissure. By comparing the calculation results from three commonly used damage models and the experimental results, a weighted combination method using Chen model was selected in this paper as the seismic damage evaluation. A numerical model considering the soil-structure interaction (SSI) was proposed using ABAQUS software. The model was calibrated by comparing with the experimental results. The results from the analysis indicated that, for the structure across the earth fissure, the existence of earth fissure changed the damage distribution of the structural members. The damage of structural members in the hanging wall was greater than that in the foot wall. Besides, the earth fissure enlarged the damage degree of the structural members at the same location and changed the position of the weak story. Moreover, the damage degree of the structure across the earth fissure was greater than that of the structure without the earth fissure under the same excitation. It is expected that the results from this research would enhance the understanding of the performance-based seismic design for the structure across the earth fissure. [ABSTRACT FROM AUTHOR]