More than 20 years ago MAURER started protecting constructions from seismic damage and has advanced development ever since. The business is getting more important every day: settlement is seismic-prone metropolitan areas is getting denser and buildings are rising higher and higher. Seismic control devices efficiently help to avoid damages on bridges, superstructures and, especially, sensitive installations such as tanks for liquefied gas storage, nuclear plant waste fuel. At the same time our devices minimise the negative effects of normal everyday strain. MAURER Seismic Control Devices – that means numerous technological and structural engineering in-house developments that effectively protect structural systems by means of isolation and/or dissipation in the interplay of forces and motions.
Sanfield back in India has to its credit the first ever application of shock transmission units in any indian bridge structure which dates back to the year 1999. Being the pioneer in the technology of structural protection devices and specially for seismic protection, we are constantly updating ourselves with the state of art technology and products to service our customers better.
Rigid connection devices provide for the horizontal fixation of structural systems. Alongside conventional structural bearings with locking MAURER also offers solutions for temporary fixation, so-called shock transmission units and break-off devices. In case of an earthquake these devices enable motion of the horizontal structural up-bearing.
MAURER Shock Transmission Units are hydraulic safety devices that lock at strong impulses, such as earthquake shocks or sudden braking on bridge constructions, and therefore clamp the construction. However, they are designed to allow shifting without much resistance if slow movements occur as in everyday usage. MAURER Load Limiters are hydraulic-safety devices that limit the reaction force upward by velocity-based control of oil flow. By using such elements, construction damage caused by extreme shifting velocities can be efficiently avoided.
MAURER Predetermined Break-Away Force restraints transmit normal horizontal forces from service and ultimate loads such as conventional structural bearings. Since mechanical features and breaking mechanisms are accurately composed with minimal tolerance, these safety devices break exactly at previously defined loads in case of an earthquake and thus protect the construction by subsequent isolation from the subsurface. MAURER Predetermined Break-Away Force Restraints are available, for example, as cleat structures and telescope devices.
MAURER Dissipators are able to continuously and specifically dissipate forces that are exerted on a structural system during an earthquake. Therefore, damages due to excessive motion can be avoided. The high effictiveness of dissipators is achieved by the use of various damping properties of diverse material and liquids. The range of MAURER Dissipators comprises systems that depend on deformation an velocity as well as adaptive systems.
MAURER Elastomeric Dampers work with specially developed elastomeric mixtures of different damping properties and are used in building construction and to damp component assemblies. The effect of these safety devices relies on deformation and is characterized by good recentring properties an reduction in constraints.
The so-called MRSD-Dampers are used in bridge constructions and in superstructures and can be combined with normal sliding bearings for load transmission. The relatively high energy dissipation is performed by steel elements of special geometric form which are plastically deformed depending on th degree of displacement. This enables the necessary recentring of a construction. MRSD-Dampers are produced in cooperation with the Middle East Technical University of Ankara (Prof. Dr. Murat Dicleli) in Munich.
These safety devices are used for bridge constructions. Usually, MAURER Steel-Hysteresis-Dampers are installed in combination with elastic recentring elements, e.g. elastic columns or elastomeric bearings.
MAURER Hydraulic Dampers dissipate energy by using varying fluid viscosities. These safety devices are therefore different from usual linear-viscous dampers. MAURER Hydraulic Dampers enable a reaction force when fast motions occur which is almost entirely independent of velocity. Optimal damping can thus be achieved and limit exceeds be avoided.
MAURER Semi-Active Dampers are equipped with a magnetorheological fluid – a carrier liquid with magnetically polarizable particles. The fluid viscosity can be regulated by means of an electronically modifiable magnetic field and, thus, by making individual changes in the algorithms, the damping performance can be adjusted continuously at extremly rapid reaction times and low energy expenditure. This enables an optimization of deforming and bearing forces.
MAURER Isolators enable an effective separation of constructions from the subsurface. Serious damages due to earthquakes can therefore be avoided. MAURER Isolators are constructed to perfectly meet the following four basic requirements: carrying vertical loads, horizontal displacement capacity, horizontal recentring and effective energy dissipation.
MAURER Elastomeric Bearings are similar to conventional construction bearings and feature a good recentring capability at horizontal deviation. To meet specific requirements of customers and business partners, MAURER can provide elastomeric mixtures with either low (LDRB) or high (HDRB) damping.
MAURER Lead Rubber Bearings are conventional elastomeric bearings that are combined with an integrated lead cylinder. While the main functions of usual elastomeric bearings are bearing and reset, the lead core enables efficient energy dissipation. MAURER Lead Rubber Bearings are mainly used in bridges and superstructures.
MAURER Sliding Isolation Pendulum Bearings combine the outstanding features of spherical bearings with the recentring effect according to the pendulum principle. This effect is achieved by using a curved main sliding surface. When friction occurs on the sliding surface, energy is directly dissipated in the sliding isolation pendulum bearing. Using the sliding material MSM® – lubricated and unlubricated – customers can choose from a wide range of friction coefficients. MAURER Sliding Isolation Pendulum Bearings meet all requirements on sliding bearings during usage according to the standards.
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MAURER Sliding Bearings are structural bearings with particular dissipation properties. Using the sliding material MSM® – lubricated and unlubricated – customers can choose from a wide range of friction coefficients. MAURER Sliding Bearings meet all requirements for sliding bearings during usage according to the standards. The special MAURER Rocker Sliding Bearings are particularly suited as isolators in building construction.