Building structure foundation module having three-dimensional shock isolation and vibration attenuation functions

Abstract

The invention discloses a building structure foundation module having three-dimensional shock isolation and vibration attenuation functions. The building structure foundation module mainly comprises asteel structure small platform, a sliding support, a variable vertical stiffness combination laminated special rubber / steel plate support having a vertical self-regulating deformation capability, andviscoelastic damping energy absorption shock absorbers, wherein the centers of the viscoelastic damping energy absorption shock absorbers are connected in parallel; the sliding support uses an oily self-lubricating liquid phase-solid phase material, the coefficient of sliding friction is relatively low, the horizontal seismic component is effectively stopped from transferring to an upper structure, the shock absorber and a liquid / solid special rubber support having a damping characteristic are connected together in parallel and have a vibration attenuation effect, so that the effects of three-dimensional shock isolation, vibration attenuation and protection are achieved. The technical scheme has more sensitive and efficient actions on the earthquake.

Description

Technical field [0001] The invention belongs to the technical field of building foundation vibration isolation, energy dissipation and vibration reduction. technical background [0002] China's mandatory standard (P149, Chapter 12, Design of Seismic Isolation and Energy Dissipation, "Code for Seismic Design of Buildings 2016" GB 50011-2010) states: Base isolation refers to the foundation, bottom or lower part of buildings such as houses A seismic isolation layer with integral reset function is set between the structure and the upper structure, which is composed of rubber bearings and damping devices. The time lag effect of the rubber shear deformation in the horizontal direction can be used to extend the natural vibration period of the entire building structure system , Avoid the main energy frequency band of ground motion, reduce the horizontal seismic effect of the input superstructure, and even isolate the superstructure from the ground vibration, reduce the seismic effect of ...

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Problems solved by technology

[0007] At present, it is relatively mature at home and abroad. Since academician Zhou Fulin promoted the first demonstration project in Shantou in China in 1993, it has been popularized and applied for many years. GB 50011-2010)", China's construction industry recommended standard "building isolation rubber bearing" JG / T118-2018), the schematic diagram of the traditional laminated steel plate / rubber isolation bearing is as follows Figure 1 As shown, it mainly includes the upper / lower steel guard plate, the upper / lower installation steel plate and its connecting bolts, the laminated rubber plate in the middle core and the laminated steel plate between the rubber plates, using the high elasticity of rubber and the steel plate The respective advantages of high compression resistance, rubber can elastically deform and recover under the action of horizontal shear force, compared with the upper and lower connections of ordinary traditional rigid building structures, laminated steel plate / rubber isolation bearings can absorb the seismic energy in the horizontal direction Less and hysterically transmitted to the upper building structure, thereby increasing the vibration period of the upper building structure, and relatively better for buildings with shorter natural vibration periods to resist horizontal earthquakes; traditional laminated steel plate / rubber The shortcomings of the technology and design of the support are that there is generally no vibration damping effect on the vibration of the upper building structure caused by the vertical earthquake action, and there is no effective vibration damping protection for the upper structure. Another shortcoming is the long-period horizontal direction. Under the action of earthquake, it will even play the role of earthquake, so that the horizontal deformation of the rubber bearing is too large and the risk of resonance instability and ring damage occurs (Yang Lin, Zhou Xiyuan, application of variable stiffness protection device in basic earthquake-isolated buildings Earthquake Response Analysis, Industrial Construction, Vol.36, NO.9, 2006)

[0018] In addition to the above three main isolation structures, energy dissipation and vibration reduction is to guide the energy input from the earthquake into the building structure to the specially set energy dissipation mechanism and components for absorption and dissipation, so as to protect the safety of the main body of the building. It is currently developed and applied Energy dissipation dampers mainly include displacement-related friction dampers, mild steel and alloy dampers, lead dampers, steel plate or steel pipe / rubber interlayer viscoelastic dampers, and speed-related piston-type viscous oil dampers (Document-JGJ297-2013, "Technical Regulations for Building Energy Dissipation and Shock Absorption" and Document-JG / T 209-2012, "Building Energy Dissipation Damper"), these types of dampers either use interface friction or use materials Elastic-plastic deformation or the use of high-pressure oil to forcibly pass through the orifice to generate damping force have certain force / displacement hysteresis characteristics. They are mainly used in high-rise structures as interstory damping supports to absorb seismic energy in the horizontal direction, and are not yet suitable for use. The seismic isolation base layer of the building; especially the piston-type viscous oil damper, which generally adopts a double-outlet oil damper with piston rods, and a small damping hole is opened on the main piston. The energy dissipation damper used as the structural foundation is a severe test for long-term work to ensure that the dynamic seal does not leak oil. The long-term reliability of this structure is not convincing enough for the structural foundation isolation and vibration reduction.

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