Study Of Electro-hvdraulic Proportional Loading System Applied On Integrated Construction Components Fire Resistance Test Furnace

Frequent building fires bring huge financial loss to both individuals and society. With the development of our fire protection consciousness as well as the scientific and technological level, the studies of fire safety building design and the fireproof components, are becoming important subjects in the development of modern firefighting science. Fire test furnace is the essential equipment in study of building components fireproof performance, but to the limit of technology, the domestic fire test furnaces have the disadvantages of low efficiency, simple function and limited objects, and it only can complete the fireproof performance research for single building component.In the dissertation, the electro-hydraulic proportional loading system Applied on Integrated Construction Components Fire Resistance Test Furnace could test15building components such as column, beam, wall, floor and integrated components, and the height of the components were from3to10.2meters. Both of the high temperature bearing capacity and the material characteristics were studied at the same time. The main research content is as follows.In chapter1, the purposes and significance of the study were presented. First, the research status of building components fire test and the furnace for it were introduced. Then, the common electro-hydraulic proportional loading system for the building components combined fire test furnace was pointed out. At last, the significance and content of the study was summarizedIn chapter2, the loading scheme of the fire test furnace was studied and designed. First, the loading system is summarized, and optimization design of the arrangement of loading point was given. Then, The principle design, parameter calculation and the key components selection of the electro-hydraulic proportional loading system were done. Finally, the principle of control system was introduced, and the hardware integration design was done.In chapter3, the principle of electro-hydraulic proportional loading system was analyzed. Established math models of proportional pressure control system and Electro- hydraulic proportional loading system, and analyzed the transfer function of them. Simulated the models and acquired the response curve with MATLAB, and analyzed the loading characteristic.In chapter4, fuzzy PID controller of the loading system was designed. First, loading control scheme of the system, the concept and basic design method of fuzzy controller were introduced. Then, the theoretical analysis of the PID controller was done. At last, the stability and the control effect of the fuzzy PID controller was studied by simulation.In chapter5, the software design of loading system and experiments were done. The design of the software was presented, including the user interface, PLC control procedures and the communication method between PC and PLC. Then the experiments for the software, the analysis of the feasibility of it were done.In chapter6, the achievements of the thesis were briefly summarized and the further research work was presented.