Oscillations, deformations, and the effects of high forces can sometimes lead to very significant reactions in buildings. MAURER seismic isolators ensure that these impacts do not cause negative consequences in structures. To guarantee the quality and durability of our products, we place great importance during manufacturing on the highest precision, continuous control, and cooperation with state testing institutions (KazNIISA).
MAURER seismic isolators absorb and transfer vertical and horizontal loads and provide the ability for rotations in support nodes, as well as relative displacements where required. The most effective approach to seismic protection is the combination of isolation and energy dissipation concepts, transforming seismic energy into heat and friction.
MAURER isolators make it possible to effectively provide dynamic isolation of a structure from its foundation. This allows the structure to avoid damage caused by seismic воздействия. Thanks to their design, MAURER isolators optimally fulfill four fundamental requirements: bearing vertical loads, horizontal flexibility, self-centering in the horizontal plane, and efficient energy dissipation.
Type 01
Elastomeric Seismic Isolators with Lead Core: MLRB
Seismic isolators with lead core MAURER (MLRB, MAURER Lead Rubber Bearing) are seismic protection bearing components representing a combination of conventional elastomeric isolators with integrated lead cylinders (cores).
While the elastomeric bearing component primarily performs the functions of support and self-centering, the lead core serves as an effective energy absorber in the event of an earthquake. Therefore, the hysteresis curve of these bearing components forms a significantly larger area and horizontal reaction force due to the lead core than that of conventional elastomeric bearing components.
MAURER bearing components with lead core are widely used in industrial, commercial, and civil construction.
Type 02
Elastomeric Seismic Isolators: MLDRB and MHDRB
MAURER MLDRB and MHDRB elastomeric bearing components are seismic isolators that simultaneously have the properties of conventional structural bearing components. They are characterized by excellent self-centering capability under horizontal displacement. In the event of an earthquake, they dynamically isolate the structure from its foundation.
Depending on project requirements, we offer elastomer compounds with low damping (MLDRB, MAURER Low Damping Rubber Bearing) and high damping (MHDRB, MAURER High Damping Rubber Bearing).
Low-damping elastomeric isolators consist of several layers of special elastomer stacked on top of one another and connected by steel plates. The isolators transfer vertical loads while providing the ability to rotate and self-center, depending on the elastomer height and its shear modulus. Depending on the requirements, the shear modulus ranges from 0.6 to 1.2 N/mm².
High-damping elastomeric isolators consist of elastomer with high damping properties. High-damping rubber has a larger contact area between elastomer molecules and filler, which leads to higher damping values from 10% to 20% and a larger hysteresis curve area.
Type 03
Flat Sliding Elements
MAURER flat sliding elements serve as structural bearing components and feature special energy dissipation properties. The use of MSM® sliding material with or without lubrication makes it possible to select from a wide range of friction coefficients. In this way, all requirements specified in standards for sliding bearing components under design load combinations are met.
Unlike pendulum sliding bearing components, flat sliding bearing components are not capable of self-centering and therefore must be used in combination with a self-centering element such as MARTI.
MAURER flat sliding elements and flat articulated sliding bearing components, in combination with self-centering devices, are excellent isolators for bridge construction and industrial and civil engineering. Such flat sliding elements without self-centering have one flat sliding surface that allows horizontal displacement. Energy dissipation occurs through friction between MSM® and the stainless steel sliding plate.
Type 04
Spherical Pendulum Seismic Isolators
MAURER pendulum sliding bearing components possess all the excellent properties of spherical bearing components. Self-centering occurs according to the pendulum principle due to the curved shape of the main sliding surface. Energy is dissipated through friction between the sliding surfaces. The use of MSM® sliding material with or without lubrication allows selection from a wide range of friction coefficients from 1% to 7%.
The design of pendulum bearing components is developed individually based on the customer’s specification by varying friction coefficients, pendulum length, and displacements within the bearing component. Pendulum sliding bearing components can carry vertical loads of 250 MN and more, which corresponds to a mass of 25,000 tons.
MAURER pendulum sliding bearing components require no technical maintenance during operation and are designed for a service life of 100 years or more. In the event of an earthquake, MAURER pendulum bearing components are activated immediately and without jerks during displacement, since the difference between static and sliding friction is minimal.
To achieve higher damping performance, pendulum sliding bearing components can be used in combination with MAURER hydraulic or hysteretic dampers. This accumulation of potential energy creates the self-centering capability of the bearing component.