To further verify the feasibility of newly designed reinforced bamboo scrimber composite(RBSC)beams used in building construction,the bonding properties between steel bar and bamboo scrimber were investigated by anti-...To further verify the feasibility of newly designed reinforced bamboo scrimber composite(RBSC)beams used in building construction,the bonding properties between steel bar and bamboo scrimber were investigated by anti-pulling tests.Results indicated that the anti-pulling mechanical properties were significantly correlated to the diameter,thread form and buried depth of steel bar,forming density of bamboo scrimber as well as the heat treatment of bamboo bundle.There were two failure modes for anti-pulling tests:the tensile fracture and pulling out of steel bar.Both the ultimate load and average shear strength of anti-pulling specimen could be increased greatly with the ribbed bar,high forming density of bamboo scrimber and un-heated bamboo bundle.Furthermore,a theoretical calculation model of the bonding interface between steel bar and bamboo scrimber was developed.Based on the theoretical calculation model,the change laws of normal stress of bamboo scrimber,and shear stress of glue layer along the buried depth of steel bar were revealed.This study is beneficial for the safety application of RBSC beams in building construction.展开更多
传统的调车防护系统通过设立专门的控制设备来实现调车防护功能,投资大且系统复杂。针对神朔铁路,为了避免新增设备重复投资,文章利用其既有通信信号系统技术装备,研制出一套基于无线信号控制系统(radio based signalling control syste...传统的调车防护系统通过设立专门的控制设备来实现调车防护功能,投资大且系统复杂。针对神朔铁路,为了避免新增设备重复投资,文章利用其既有通信信号系统技术装备,研制出一套基于无线信号控制系统(radio based signalling control system, RBSC)的调车防护系统。该系统采用RBSC与列车运行监控装置LKJ之间直接通信的方式来实现调车防护功能,RBSC根据联锁设备发送的站场动态信息和LKJ发送的列车位置信息,计算出调防信息和行车许可,并通过无线网络发送给LKJ,控制列车安全调车。其不仅无需设立专门的控制设备,还可以充分利用联锁设备,缩短系统开发周期。文章阐述了该调车防护系统架构及工作原理,并通过神朔铁路现场试用验证了方案的可行性。展开更多
基金supported by the National Key Research and Development Program of China(2016YFC0701505).
文摘To further verify the feasibility of newly designed reinforced bamboo scrimber composite(RBSC)beams used in building construction,the bonding properties between steel bar and bamboo scrimber were investigated by anti-pulling tests.Results indicated that the anti-pulling mechanical properties were significantly correlated to the diameter,thread form and buried depth of steel bar,forming density of bamboo scrimber as well as the heat treatment of bamboo bundle.There were two failure modes for anti-pulling tests:the tensile fracture and pulling out of steel bar.Both the ultimate load and average shear strength of anti-pulling specimen could be increased greatly with the ribbed bar,high forming density of bamboo scrimber and un-heated bamboo bundle.Furthermore,a theoretical calculation model of the bonding interface between steel bar and bamboo scrimber was developed.Based on the theoretical calculation model,the change laws of normal stress of bamboo scrimber,and shear stress of glue layer along the buried depth of steel bar were revealed.This study is beneficial for the safety application of RBSC beams in building construction.
文摘传统的调车防护系统通过设立专门的控制设备来实现调车防护功能,投资大且系统复杂。针对神朔铁路,为了避免新增设备重复投资,文章利用其既有通信信号系统技术装备,研制出一套基于无线信号控制系统(radio based signalling control system, RBSC)的调车防护系统。该系统采用RBSC与列车运行监控装置LKJ之间直接通信的方式来实现调车防护功能,RBSC根据联锁设备发送的站场动态信息和LKJ发送的列车位置信息,计算出调防信息和行车许可,并通过无线网络发送给LKJ,控制列车安全调车。其不仅无需设立专门的控制设备,还可以充分利用联锁设备,缩短系统开发周期。文章阐述了该调车防护系统架构及工作原理,并通过神朔铁路现场试用验证了方案的可行性。
