With the rapid development of China economy and critical ecological situation in China,ecological renovation of existing buildings has become a special important topic. Key techniques on ecological renovation design o...With the rapid development of China economy and critical ecological situation in China,ecological renovation of existing buildings has become a special important topic. Key techniques on ecological renovation design of existing buildings in China are explored in this paper. Special attention is paid to specific treatments suitable for China.展开更多
A straightforward technique has been developed to quickly determine the wall contour of super/hypersonic nozzles working at multiply Mach number which share a common throat section.Mach number distribution along the c...A straightforward technique has been developed to quickly determine the wall contour of super/hypersonic nozzles working at multiply Mach number which share a common throat section.Mach number distribution along the centerline of the nozzle is specified in advance and divided into two sections,both of which are described by the b-spline function.The first section is shared by different exit Mach number nozzles.The nozzle contour is determined by the method of characteristics plus boundary layer correction.An example of this design method is employed to illustrate the technique with a computational fluid dynamics calculation.The simulation results indicate that desired Mach numbers are obtained at the nozzle exit,and the good flow quality is attained for different nozzles within δMa/Ma<±0.56% in the flow core region.This technique improves the design precision of the converging-diverging nozzle,cancels waves completely,and achieves nozzles with multiple Mach number exiting which share a common throat section.展开更多
This work describes the retro-analysis of design of rehabilitation of existing bridge over the river Cubiculo on BR-101 in Santa Catarina, Brazil, aiming to evaluate the intervention processes. In this way, it was ver...This work describes the retro-analysis of design of rehabilitation of existing bridge over the river Cubiculo on BR-101 in Santa Catarina, Brazil, aiming to evaluate the intervention processes. In this way, it was verified that the project adopted for strengthening of the structure was not adequate to support the evolution of the maximum load over time and the overload due to widening, and it was also verified that the changes in the load factor do not comply with the update of the Brazilian Technical Standards ABNT： NBR-7188 [1]. The retro-analysis of the bridge rehabilitation project has demonstrated fundamental importance to avoid possible design failings, accidents, and reworks. Affirming that it is essential to comply with Standards and Technical Manuals on the elaboration of the rehabilitation project of structures and in choosing the type of intervention to the existing structure.展开更多
基金the financial support from the Technology Pillar Program during the Eleventh Five-Year Plan Period (project2008BAJ08B11)
文摘With the rapid development of China economy and critical ecological situation in China,ecological renovation of existing buildings has become a special important topic. Key techniques on ecological renovation design of existing buildings in China are explored in this paper. Special attention is paid to specific treatments suitable for China.
基金Project(11072264) supported by the National Natural Science Foundation of China
文摘A straightforward technique has been developed to quickly determine the wall contour of super/hypersonic nozzles working at multiply Mach number which share a common throat section.Mach number distribution along the centerline of the nozzle is specified in advance and divided into two sections,both of which are described by the b-spline function.The first section is shared by different exit Mach number nozzles.The nozzle contour is determined by the method of characteristics plus boundary layer correction.An example of this design method is employed to illustrate the technique with a computational fluid dynamics calculation.The simulation results indicate that desired Mach numbers are obtained at the nozzle exit,and the good flow quality is attained for different nozzles within δMa/Ma<±0.56% in the flow core region.This technique improves the design precision of the converging-diverging nozzle,cancels waves completely,and achieves nozzles with multiple Mach number exiting which share a common throat section.
文摘This work describes the retro-analysis of design of rehabilitation of existing bridge over the river Cubiculo on BR-101 in Santa Catarina, Brazil, aiming to evaluate the intervention processes. In this way, it was verified that the project adopted for strengthening of the structure was not adequate to support the evolution of the maximum load over time and the overload due to widening, and it was also verified that the changes in the load factor do not comply with the update of the Brazilian Technical Standards ABNT： NBR-7188 [1]. The retro-analysis of the bridge rehabilitation project has demonstrated fundamental importance to avoid possible design failings, accidents, and reworks. Affirming that it is essential to comply with Standards and Technical Manuals on the elaboration of the rehabilitation project of structures and in choosing the type of intervention to the existing structure.
