Shaking table tests of a full‐scale 10‐story reinforced‐concrete building (2015). Phase II: Seismic resisting system

Abstract

A 10‐story reinforced‐concrete (RC) building was subjected to a shaking table test using E‐Defense, the largest three‐dimensional earthquake simulator in the world, to estimate the effects of a flexible foundation and seismic response of a mid‐rise building. Two structural systems with different base supporting conditions were adopted for two phases of tests for comparative purposes: the first system was free‐standing with base sliding and uplifting, and the second was a conventional RC seismic resisting system with a fixed base. This paper mainly reports the test results for the conventional RC seismic resisting system with a fixed base, which comprises a moment‐resisting frame system in the longitudinal direction and a frame system with multistory shear walls in the transverse direction. The objective of this research was to confirm the seismic capacity of a mid‐rise building designed in accordance with current Japanese building standards and guidelines. Even though the story drift ratio exceeded 3% under extreme motion exceeding the design earthquake, the structure remained stable throughout the tests, satisfying the design concept of collapse prevention performance, whereas relatively severe damage was observed in the beam–column joints. Crack observations indicated massive damage sustained by the beam–column joints. The measured shear deformations at the beam–column joints accounted for more than half of the inter‐story drift at the peak response.

Shaking‐table test results of a full‐scale free‐standing building with base sliding and rocking

“…This experiment was conducted as part of the project of the National Research Institute for Earth Science and Disaster Resilience. After this experiment, we conducted seismic structure experiments in which the foundation was fixed 27 . To conduct the shaking‐table test of the seismic structure, the specimen that moved during the shaking‐table tests of the free‐standing structure was moved to its initial position using hydraulic jacks.…”

“…After this experiment, we conducted seismic structure experiments in which the foundation was fixed. 27 To conduct the shaking-table test of the seismic structure, the specimen that moved during the shaking-table tests of the free-standing structure was moved to its initial position using hydraulic jacks. Figure 10 shows the relationship between the static friction coefficient obtained from the maximum force of each hydraulic jack.…”