【摘要】 针对拟修建的全装配式地铁车站,提出一种以榫槽式连接为基础的接头形式,并在接头预留空隙内灌注黏结浆液强化其连接可靠性和抗变形能力。对两种长度的单榫槽式接头的不同轴弯组合进行破坏性试验。通过综合分析接头位置表面裂缝、表面混凝土应变及内部关键位置钢筋应力发展变化情况,明确接头的抗弯承载能力,并把接头的抗弯承载分为5个阶段。结合接头接缝张开量,从防水及结构受力的角度给出设计上可以采用的接头最大安全抗弯承载值。最后,通过分析安全阶段的最大偏心距明确不同工况下一定轴力范围内接头的抗弯承载能力。更多还原

【Abstract】 Targeting the metro station to be built with prefabricated concrete structure,a new type of joint was proposed which is based on the tongue and groove connection with bond slurry to strengthen the reliability and the anti-deformability.An axial force and moment destructive experiment was conducted on the single tongue and groove type joints with two different lengths.By means of the analysis of the surface crack,surface concrete strain and internal reinforcement stress,the flexural capacity of the joint was determined,which was divided into five stages.Combined with the joint opening,the maximum safety bearing value in design was put forward from the prospective of water resistance and structure stress.Finally,by analyzing the maximum eccentricity of the safety stage,the flexural capacity of joints within a certain range of axial force under different working conditions was defined.更多还原