A removable stiffness increasing device of the concrete precast slab and its performance analysis

摘要

Assembled monolithic structure is a common structure in the process of housing industrialization, among which the composite plate is an indispensable element. The thickness of the precast slab of composite plate is small so special measures have to be adopted to prevent the excessive deformation even destruction occurred during hoisting or transport. A novel removable stiffness increasing device for precast slab is presented in this paper. The device consists of steel truss, upper steel plate and steel base plate and can effectively improve the performance of the slab during hoisting and transport. The device has the advantages of simple construction and no special equipment is necessary. The device can be removed after being hoisted and saving cost. The performance of the slab with the device during hoisting and transport is analyzed and appropriate shape parameters are suggested.