The column-to-beam flexural strength ratio(CBFSR)has been used in many seismic codes to achieve the strong column-weak beam(SCWB)failure mode in reinforced concrete(RC)frames,in which plastic hinges appear earlier in ...The column-to-beam flexural strength ratio(CBFSR)has been used in many seismic codes to achieve the strong column-weak beam(SCWB)failure mode in reinforced concrete(RC)frames,in which plastic hinges appear earlier in beams than in columns.However,seismic investigations show that the required limit of CBFSR in seismic codes usually cannot achieve the SCWB failure mode under strong earthquakes.This study investigates the failure modes of RC frames with different CBFSRs.Nine typical three-story RC frame models with different CBFSRs are designed in accordance with Chinese seismic codes.The seismic responses and failure modes of the frames are investigated through time-history analyses using 100 ground motion records.The results show that the required limit of the CBFSR that guarantees the SCWB failure mode depends on the beam-column connection type and the seismic intensity,and different types of beam-column connections exhibit different failure modes even though they are designed with the same CBFSR.Recommended CBFSRs are proposed for achieving the designed SCWB failure mode for different types of connections in RC frames under different seismic intensities.These results may provide some reference for further revisions of the SCWB design criterion in Chinese seismic codes.展开更多
针对酒店的运营质量和管理效率需求,文章采用C#语言编写、结合.NET三层架构,利用SQL Server 2008数据库存储数据设计并实现酒店管理系统。文章首先对系统进行分析,然后依次对系统、数据库、及界面进行设计,最后实现了基于.NET三层架构...针对酒店的运营质量和管理效率需求,文章采用C#语言编写、结合.NET三层架构,利用SQL Server 2008数据库存储数据设计并实现酒店管理系统。文章首先对系统进行分析,然后依次对系统、数据库、及界面进行设计,最后实现了基于.NET三层架构的酒店管理系统。展开更多
应用ASP.NET,ADO.NET和SQL Server 2000等方面的技术,设计实现了Web人事管理系统,在设计和实现过程中充分利用三层架构对系统进行了优化.文章简要论述了该系统的设计与实现方法,该系统的设计提高了高校人事管理工作的效率,实现了数据共...应用ASP.NET,ADO.NET和SQL Server 2000等方面的技术,设计实现了Web人事管理系统,在设计和实现过程中充分利用三层架构对系统进行了优化.文章简要论述了该系统的设计与实现方法,该系统的设计提高了高校人事管理工作的效率,实现了数据共享,并对高校的行政管理工作起到了积极有力的促进作用.展开更多
针对销售的运营质量和管理效率需求,文章采用C#语言编写、结合.NET三层架构,利用SQL Server 2008数据库存储数据设计并实现销售管理系统。文章首先对系统进行分析,然后依次对系统、数据库及界面进行设计,最后实现了基于.NET三层架构的...针对销售的运营质量和管理效率需求,文章采用C#语言编写、结合.NET三层架构,利用SQL Server 2008数据库存储数据设计并实现销售管理系统。文章首先对系统进行分析,然后依次对系统、数据库及界面进行设计,最后实现了基于.NET三层架构的销售管理系统。展开更多
基金National Key R&D Program of China under Grant No.2017YFC1500601National Natural Science Foundation of China under Grant Nos.51678541 and 51708523Scientific Research Fund of the Institute of Engineering Mechanics,China Earthquake Administration under Grant No.2016A01。
文摘The column-to-beam flexural strength ratio(CBFSR)has been used in many seismic codes to achieve the strong column-weak beam(SCWB)failure mode in reinforced concrete(RC)frames,in which plastic hinges appear earlier in beams than in columns.However,seismic investigations show that the required limit of CBFSR in seismic codes usually cannot achieve the SCWB failure mode under strong earthquakes.This study investigates the failure modes of RC frames with different CBFSRs.Nine typical three-story RC frame models with different CBFSRs are designed in accordance with Chinese seismic codes.The seismic responses and failure modes of the frames are investigated through time-history analyses using 100 ground motion records.The results show that the required limit of the CBFSR that guarantees the SCWB failure mode depends on the beam-column connection type and the seismic intensity,and different types of beam-column connections exhibit different failure modes even though they are designed with the same CBFSR.Recommended CBFSRs are proposed for achieving the designed SCWB failure mode for different types of connections in RC frames under different seismic intensities.These results may provide some reference for further revisions of the SCWB design criterion in Chinese seismic codes.
文摘应用ASP.NET,ADO.NET和SQL Server 2000等方面的技术,设计实现了Web人事管理系统,在设计和实现过程中充分利用三层架构对系统进行了优化.文章简要论述了该系统的设计与实现方法,该系统的设计提高了高校人事管理工作的效率,实现了数据共享,并对高校的行政管理工作起到了积极有力的促进作用.
