| 摘要 |
<p>Aseismic Almost Lifted Structure ('AALS') is a specific solution of problems related to earthquake and similar disturbances, which belongs to the well known 'sliding concept', where the main structure (MS) is split from the supporting structure (SS) by a low friction material (LFM), thus allowing the main structure to slide, when forced. The sliding force is controlled by means of system for lifting of the main structure (LS). Because of large lifting force, the 'AALS' system has a very small friction force i.e. very small seismic force could be transmitted to the main structure during an earthquake. The 'AALS' is defined by the following simple formulas: G = L + N, L >> N, N > or = 0, Fr = mu N, 'Fr' is the horizontal force (friction force) which is transmitted to the MS, 'G' is the total weight of the main structure, 'L' is lifting force, 'N' is compression force at the dry contact(s), 'mu' is the friction coefficient.</p> |
