APPARATUS FOR TESTING STRUCTURAL STRENGTH OF LONG SPAN STRUCTURE IN HORIZONTAL HEATING FURNACE USING UNIFORM LOADING JIG, AND METHOD FOR THE SAME

摘要

PURPOSE: A loading device and a loading method using an uniform loading jig for a horizontal furnace of a long span is provided to connect the multipoint uniform loading jig to the loading device, thereby loading an uniform load to the horizontal furnace of the long span. CONSTITUTION: A loading device using an uniform loading jig(250) for a horizontal furnace of a long span comprises a loading frame assembly(240), a loading unit(230), a hydraulic unit(220), a control unit(210), a moving handle(260), and a steel ruler(270). The loading frame assembly is arranged in a rail arranged in both sides of a furnace body, thereby moving in a longitudinal direction of the furnace body. The loading unit is mounted on the upper part of the loading frame assembly, moves to a transverse direction of the furnace body, and includes an actuator applying vertical pressure to a horizontal member specimen. The hydraulic unit includes a hydraulic pump and a hydraulic tank, thereby applying fluid pressure to the actuator. The control unit controls the hydraulic pump of the hydraulic unit and the operation of the actuator, determines a load, the stress, and the displacement of an essential portion of the horizontal member specimen, and observes a destroying process of the horizontal member specimen, thereby confirming the static strength, the dynamic strength, and fatigue properties of the horizontal member specimen. The uniform loading jig includes a plurality of pressing plates face-contacting to the horizontal member specimen in order to transfer the uniform loading to the horizontal member specimen. [Reference numerals] (100) Long span horizontal heating furnace; (200) Loading device; (210) Control unit(PC); (220) Hydraulic pressure unit; (221) Hydraulic pressure pump; (222) Hydraulic pressure tank; (230) Loading unit; (231) Control program; (232) Hydraulic servo controller(DSP); (233) Hydraulic servo valve; (234) Actuator; (235) Load cell; (236) Non-contact displacement meter; (240) Loading frame assembly; (250) Uniform loading jig; (260) Moving handle; (270) Steel ruler; (300) Specimen(horizontal member); (AA) Loading; (BB) Heating(fire-resistance test);