Pretensioning installation method of buckling-restrained braces

Abstract

The present invention provides a pre-tensioning installation method of buckling-constrained supports. After the construction of the layer structure is completed and at the same time as the subsequent structure construction, the fixed end of the buckling-constrained supports is fixedly connected to the connection node at the first frame beam, and the Elastic deformation space is reserved between the tension end and the connecting node at the second frame beam; the buckling-constrained support is initially tensioned by a tension jack; after the tension of the buckling-constrained support reaches the predetermined tension value, the The tension value of the support is corrected and adjusted twice to ensure that the supports on the same floor reach the predetermined tension value, and then the tension end is fixedly connected to the corresponding connection node; finally, the buckling-constrained support is stretched. This installation method effectively reduces the adverse effects of vertical loads and compression offsets, making it easier to achieve the ultimate bearing capacity of the buckling restraint support performance, ensuring its full performance, shortening the installation period, and reducing construction costs.

Description

technical field [0001] The invention relates to the technical field of earthquake resistance and disaster prevention of building structures, in particular to a pretensioning installation method of buckling constrained supports. Background technique [0002] The buckling-restrained brace is a new type of shock-absorbing component that combines lateral resistance and energy dissipation. It can not only provide the required lateral stiffness under small earthquakes, but also perform yield energy dissipation under large earthquakes. It can be used as an additional energy dissipation The energy component, which enters the plastic state before the main body of the structure, dissipates the input energy of the earthquake, thereby protecting the main structure from damage, and is a veritable "fuse" in the structure. [0003] The working principle and stress mechanism of the buckling-restrained brace have been clarified. It constrains the axially stressed parts through peripheral co...

AI Technical Summary

Problems solved by technology

Under this vertical load, the buckling-restrained support has already produced a certain initial compressive stress before participating in the resisting side, which will cause its compression bias, the hysteresis loop is not full, the energy dissipation capacity is weakened, and it is easier to reach its limit damage due to bearing capacity

In addition, the buckling restraint support cannot be installed at the same time as the main structure, but the buckling restraint support can only be installed after the main structure is completed and the main settlement is completed, so the installation period is long

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