Anti-fire test device of restrained column

Abstract

The invention relates to a fire-resistance testing device, in particular to the fire-resistance testing device used for a restrained column. The fire-resistance testing device can research the fire-resistance performance and destruction form of columns with the ends bearing different constrains in fire and can measure the expansion deformation of the column and the expansion force of the column which is generated when the expansion deformation is restrained during the fire by connecting different supporters at the two ends of the columns. A jack is arranged on a reaction frame top beam; a restrained beam is arranged in a loading reaction frame and is parallel to the reaction frame top beam; the end surfaces at two sides of the restrained beam at the top of the column and vertical columns at two sides of a loading reaction frame have gaps respectively; the reaction frame top beam is connected with the restrained beam at the top of the column by two restraining rods; a furnace body is arranged below the restraining beam at the top of the column; a testing restraining column is arranged in the furnace body. The fire-resistance testing device can exactly simulate different connection structures of beams and columns, can conveniently research the fire-resistance performance and destruction form of the columns with the ends restrained by increasing the temperature of the testing furnace in fire, and provides mass reliable testing data for the structural fire-resistance design and fire-control operation.

Description

Technical field [0001] The invention relates to a fire resistance test device. Background technique [0002] The column is an important vertical load-bearing component in the building structure. It bears and reliably transmits the vertical load. If the column collapses in a fire, it will cause the overall damage of the entire building and cause immeasurable losses. Therefore, the study of the column in the building structure It is of great significance to carry out reasonable fire resistance design. The current building code is considered as follows: First, determine the fire resistance class of the column according to the importance of the building, determine the fire resistance limit according to the fire resistance class, and take appropriate structural measures from the fire resistance limit. This design procedure has two shortcomings: 1. The fire resistance limit of the column is obtained by the standard fire experiment. In the experiment, the end constraint of the column is...

AI Technical Summary

Problems solved by technology

There are two deficiencies in this design procedure: 1. The fire resistance limit of the column is obtained by the standard fire experiment. In the experiment, the end constraint of the column is not considered. The column can expand and deform freely, and the expansion and deformation of the column in the actual structure It is constrained, and different beam-to-column connection forms have different restraint rigidity of the beam to the column; 2. Passive fire protection measures are only taken according to the fire resistance limit of the component, without considering the fire resistance of the column in the structure, and design in consideration

A large number of fires have proved that the consequences of this design method in actual engineering are either insufficient fire protection measures or a large amount of waste. Therefore, it is very important to study the fire resistance and damage forms of columns with restrained ends in fire. important practical significance

Images