A combined frame structure fire resistance test system and test method

Abstract

The invention discloses a fire-resistance testing system and a testing method of a composite frame structure. The fire-resistance testing system comprises a fixed furnace body box, a furnace top cover, a furnace side door, a movable furnace body box, a translation device, a flue, a gas control device, a counter-force frame and a control and data acquisition device, wherein a sealed box-type furnace body structure is defined by mutual connection of the fixed furnace body box and / or the movable furnace body box and / or the furnace top cover and / or the furnace side door via connecting components; the counter-force frame comprises a counter-force frame column, a counter-force frame support beam, a counter-force frame cross beam and a counter-force frame vertical loading beam; a mounting sleeve is fixedly arranged on the bottom plane of the counter-force frame vertical loading beam; a loading jack is arranged in the mounting sleeve; a loading transfer heat insulation column body connected with the furnace top cover in a penetrating way is arranged at an expansion end of the loading jack. The fire-resistance testing system can achieve fire exposure simulation testing of a building in the frame structure; a stress and deformation rule of the frame structure in a fire process can be researched according to testing data; a reference basis is provided for fire resistance design of the frame structure.

Description

technical field [0001] The invention relates to a building structure fire test system and test method, in particular to a combined frame structure fire resistance test system and test method, belonging to the technical field of disaster prevention and mitigation of building structures. Background technique [0002] Fire is one of the most frequent and destructive disasters among all kinds of disasters. Its frequency of occurrence ranks first among all kinds of disasters. In recent years, a large number of high-rise buildings have emerged in China. Once a building catches fire, it will cause huge losses to people's lives and property. Therefore, the study of the fire resistance of building structures is an important topic in the field of building fire research. [0003] In recent years, domestic scholars' research on fire has mainly focused on the properties of building materials and the fire resistance of basic components such as beams, columns, and slabs. Due to the limitat...

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Problems solved by technology

[0003] In recent years, domestic scholars' research on fire has mainly focused on the properties of building materials and the fire resistance of basic components such as beams, columns, and slabs. Due to the limitations of the height and span of the fire simulation test device, the fire resistance of frame structures There are few performance studies, which makes it difficult to study the theoretical research on the fire resistance of frame structures; in actual fires, beams, columns, plates and other components of building frame structures will show obvious differences from individual basic components due to the constraints of the frame structure due to their deformation. Stress performance and deformation performance

[0004] When studying the fire behavior and fire resistance performance of the building frame structure, if the influence of the mutual restraint of the components in the frame structure is not considered, it may lead to the difference between the internal force, deformation and fire resistance limit of the basic components obtained through the test in some cases and the actual structural components. Larger, resulting in its boundary conditions inconsistent with the actual structure, and unable to accurately reflect the fire behavior of the frame structure. The local fire resistance of the frame structure has a greater impact on the fire resistance of the overall structure of the building. Therefore, it is important to carry out research on the fire resistance of the frame structure. Important practical significance and application value, it is also necessary to establish a combined frame structure system fire resistance test system

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