The Japanese archipelago is one of the most seismically active areas in the world. As the development of urban areas become more challenging, forcing vertical expansion of space utilization, Hazama’s research and development activities have expanded to include every phase of the construction process. Hazama’s reaction floor and walls method, and its shaking table technology, which controls motion from six axes, enable real-scale 5-story structural and vibration experiments.

Reaction Floor and Walls Testing System

The reaction floor and walls testing system is used for the setting of specimens or loading systems during loading tests for structures. The length of the reaction floor is 32.5 meters, and the two reaction walls enable two-direction loading. The reaction wall can resist 10,000tfm of bending moment and 4,000tf of sheer force. The Laboratory carries out advanced seismic experiments and real-time, high-speed loading tests utilizing an online computer-controlled actuator system.

Reaction Floor and Walls Dimension of reaction floor---32.5(L)x13(W)x4.5(T)m Dimension of reaction walls--- Large--18(H)x11(W)x4(T)m Small--9(H)x7(W)x2(T)m Dimension of reaction walls--- Large---10,000tfm, Small---1,000tfm Maximum bending moment--- Large---4,000tf, Small---1,000tf
Reaction Floor and Walls (two axes loading)	Reaction Walls

Shaking Table Testing System

The facility’s high-performance shaking table can accommodate specimens up to a weight of 80t and simulate seismic behavior of large-scale specimens with a high degree of accuracy. The facility can carry out vibration tests on any type of structure, controlling both horizontal axes and vertical axes simultaneously.

Table---X:6mXY:4m Maximum load weight---80t Drive system---Electro-hydraulic servo mechanism Maximum displacement--- X:300mm Y:150mm Z:100mm Maximum acceleration--- X:1G Y:3G Z:1G (35t with35t specimen) Frequency---DC - 50Hz Floating foundation weight---3,070t
Shaking Table and Floating Foundation	Shaking Table

Hazama Technical Research Institute
515-1, KARIMA, TSUKUBA-SHI IBARAKI, JAPAN
TEL: 029-858-8803 / FAX: 029-858-8809