THE SEISMIC PERFORMANCE OF PRECAST CONCRETE FRAME STRUCTURES WITH DRY-CONNECTED ROTATIONAL FRICTION BEAM-COLUMN JOINTS
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摘要: 该研究提出了一种转动摩擦型干式装配梁-柱节点(rotational friction dissipative joint, RFDJ)，具有刚度、屈服弯矩易调控和变形、耗能能力强的特点。为了研究RFDJ对于装配式框架结构抗震性能的影响并验证其可行性，该研究以含RFDJ和灌浆套筒柱脚节点的新型装配式框架结构体系(novel precast concrete frame, NPCF)作为研究对象，基于2个不同楼层数量的传统现浇框架结构(reinforced concrete frame, RCF)分析案例，综合考虑总起滑弯矩比(ρ)和3种起滑弯矩(Ms)分布模式影响，设计了120个NPCF结构分析案例，开展了多遇和罕遇地震作用下的结构非线性时程分析，结果表明：RFDJ具备用于装配式框架结构的可行性，可实现等同或优于RCF的抗震性能；ρ和Ms分布模式是决定NPCF抗震性能的关键设计参数；结构响应随ρ的增加而降低；Ms分布模式对结构的地震响应控制机制具有显著影响，均匀累积分布模式可以最小的ρ值实现最好的层间位移角控制效果，且有利于节点深化设计和施工。该研究成果可为含干式梁-柱节点的装配式框架结构的研发和设计方法的研究提供参考。
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关键词:
- 干式梁-柱节点 /
- 装配式混凝土框架结构 /
- 转动摩擦耗能 /
- 非线性时程分析 /
- 抗震性能
Abstract: Proposes a dry-connected rotational friction dissipative precast concrete beam-column joint (rotational friction dissipative joint, RFDJ). The joint is featured by the easy-to-adjust stiffness, yield moment, desirable deformation and energy-dissipation capacities. To validate the applicability of RFDJs for precast concrete frame structures, a novel precast concrete frame structure (NPCF) which contains RFDJs and grouted sleeve column base joints is selected as the research object. Based on two conventional reinforced concrete frames (RCFs) with different numbers of stories, the total slip moment ratio (ρ) and slip moment (Ms) distribution pattern are considered to generate 120 NPCF study cases. Based on these, nonlinear time-history analysis is conducted. The analysis results indicate that the RFDJ is applicable for precast concrete frame structures to make the structural performance equal to or better than that of RCFs. The ρ and Ms distribution pattern are two critical design parameters which determine the seismic performance of the NPCF. The structural response decreases with the increase of ρ, and the Ms distribution pattern has a significant influence on the seismic response control mechanism of the structure. The uniform cumulative distribution pattern could most effectively control the inter-story drift ratio with the lowest value of ρ, which is beneficial to the detailing and construction of RFDJs. The research provides a useful reference for related studies on the development and design of precast concrete frame structures with dry-connected beam-column joints. -
图 3 含RFDJ和灌浆套筒柱脚的新型装配式框架结构体系
Figure 3. Novel precast concrete frame with RFDJs and grouted sleeve column-base joints
图 5 NPCF设计案例考虑的3种Ms分布模式αi取值
Figure 5. Values of αi of three Ms distribution patterns of NPCF study cases
图 7 选取地震动反应谱与规范反应谱对比
Figure 7. Comparison between mean spectra of selected ground motions and design spectrum of code
图 10 最优案例结构层间位移角分布
Figure 10. Distribution of story drift ratio (θ) of optimal study cases
图 11 最优案例结构罕遇地震作用下RFDJ弯矩利用率
Figure 11. RFDJ moment usage ratio of optimal study cases under MCE
表 1 最优案例结构罕遇地震作用下的Rθ, min及对应的ρ
Table 1. Values of Rθ, min and ρ of optimal study cases under MCE
Ms分布模式 NPCF6 NPCF9 ρ Rθ, min/(%) ρ Rθ, min/(%) 均匀分布 22.00 −17.12 23.00 −24.54 均匀累积分布 8.50 −21.04 12.00 −26.31 一阶振型位移角分布 16.00 −17.12 26.00 −24.54 注：ρ为总起滑弯矩比；Rθ,min为NPCF与RCF最大层间位移角的相对差值。 
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表 2 最优案例结构罕遇地震作用下的DCF
Table 2. DCF of study cases under MCE
Ms分布模式 NPCF6 NPCF9 ρ DCF ρ DCF 均匀分布 22.00 1.35 23.00 1.43 均匀累积分布 8.50 1.24 12.00 1.26 一阶振型位移角分布 16.00 1.35 26.00 1.43 注：ρ为总起滑弯矩比；DCF为层间位移角集中系数。
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