Abstract: Partial current rules of the National Standard of Fire Code are disjointed from the current development of large commercial building; as a result, part of the design cannot be carried out according to the specifications. The new digital fire control design method can solve this difficulty. This paper is to take a large commercial building as an engineering example, introducing the new design concept of “independent fire protection unit” and “quasi-safety area” to adjust the program; then, on the basis of fire safety engineering principles, it uses the computer-assisted method to predict and assess the dangers of fire and the safety of evacuation, and thus demonstrating the feasibility of this method.
Abstract: For the closed loop water system, taking ISG single stage single suction centrifugal pumps for example, we calculate the flow of the single pump and the system, which is regulated by changing the number of parallel water pumps. According to the specific speeds, during the regulation, we induce the relations between the relative flow and the relative numbers of the single pump and the system, respectively. These relations can be applied to the flow forecasting of parallel water pumps with variable numbers in the closed loop water system.
Abstract: This paper selects a new building material—foam concrete which can be used by the outer wall system as a self-insulation material, and designs two sets of specimens which are carried out the experimental study under low-cycle reversed loading. The paper analyzes the failure mode of the walls, hysteretic curves, skeleton curves, ductility and energy-dissipation capacity. Experimental phenomena and results show: by reasonable construction measures, the new latticed energy-saving wall compared with the normal filling wall possesses better seismic capacity and shear capacity, meanwhile the ductility and energy dissipation capacity of the wall is good to meet the engineering requirements. On this basis, the force mechanism of the specimen is discussed, calculation formula of shearing capacity is put forward, and the calculation results meet well with the experimental results.
Abstract: At present, the definition of smart cable is still not clear, however, the opinion that using the fiber optical sensing apparatuses as the sensing element of smart cable has formed a consensus in majority of study reports. In order to develop a new type of smart cable based on fiber Bragg grating (FBG), a scheme for fabricating smart cable which is compatible with production process of parallel steel wires cable is put forward. Aiming at the test range requirement, a novelty desensitized encapsulation structure is designed, which ensures the possibility to test steel wire strain of cable by FBG sensor. The single steel wire tension test in laboratory showed the design rationality of desensitized encapsulation structure which was reflected by the favorable linear relationship and repeatability of test results. After finish the on site tension test based on one fabricated smart cable, the proposed scheme feasibility that embedded novelty desensitized encapsulation FBG strain sensor in cable to form a new type of smart cable was verified. Test results showed that the survival rate of sensors in smart cable was high. Meanwhile, there was a clear linear relationship between the output test signal of smart cable and the tension loads and the test repeatability was acceptable as well. Finally, several improvement suggestions relating to the successful application of the proposed scheme about smart cable in actual engineering were also indicated.