板缝连接对全装配RC楼盖竖向振动特性的影响研究
引用文献：
肖波 王文康 庞瑞 景川 徐科. 板缝连接对全装配RC楼盖竖向振动特性的影响研究[J]. 建筑结构，2023，48（04）：143-148，73.
XIAO Bo WANG Wenkang PANG Rui JING Chuan XU Ke. Research on influence of slab joint connector on vertical vibration characteristics of untopped precast RC floor[J]. Building Structure，2023,48（04）：143-148，73.
摘要：为研究分布式连接全装配RC楼盖(DCPCD)中板缝连接对楼盖振动特性的影响，进行了2个DCPCD试件和1个现浇楼盖试件在四边简支条件下的对比试验。采用锤击法对3个试件进行模态试验，研究板缝连接件对DCPCD的模态振型、阻尼比和自振频率等模态参数的影响，并施加多种人行荷载激励，研究板缝连接件对DCPCD振动响应的影响。结果表明：板缝连接件可有效提高DCPCD的整体性，降低结构阻尼比，增大自振频率，大幅降低振动加速度；对基于正交双向异性板振动理论得出的DCPCD自振频率和峰值加速度的理论方法进行计算对比，与试验值吻合良好；分析了不同边界支承条件对DCPCD舒适度的影响，可通过改变边界支承条件使DCPCD满足舒适度要求；基于舒适度和经济性的考虑，建议横纵向刚度比取值在0.3～0.75之间。
关键词：全装配式RC楼盖；干式连接件；振动特性试验；舒适度；支承条件；刚度比
基金：国家自然科学基金(52278172)；国网河南省电力公司科技项目(5217L0200005)。
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[3] MOORE J R,THORNE M S,KOPER K D,et al.Anthropogenic sources stimulate resonance of a natural rock bridge [J].Geophysical Research Letters,2016,43(18):9669-9676.
[4] PALMER B.Joints in slabs [J].Concrete Construction World of Concrete,2005,50(2):58-60.
[5] 徐天爽，徐有邻.双向叠合板拼缝传力性能的试验研究[J].建筑科学，2003,19(6):11-14,38.
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[7] 操礼林，李爱群，潘志宏，等.风洞筒体预制板拼接节点力学性能试验研究[J].建筑结构学报，2012,33(8):92-100.
[8] 装配式多层混凝土结构技术规程：T/CECS 604—2019[S].北京：中国建筑工业出版社，2019.
[9] 庞瑞，陈桂香，倪红梅，等.全干式连接预制混凝土板、楼盖及其抗震性能提升方法：CN104878871B [P].2017-07-14.
[10] 庞瑞，许清风，梁书亭，等.分布式连接全装配RC楼盖竖向承载力与变形分析[J].工程力学，2019,36(4):147-157.
[11] 庞瑞，段锦茹，张艺博，等.四边简支条件下全装配式RC楼盖竖向承载性能分析[J].建筑结构，2020,50(20):90-96.
[12] PANG R,ZHANG Y B,DANG L J,et al.Experimental and numerical investigation on the vertical bearing behavior of discrete connected new-type precast reinforced concrete floor system [J].Advances in Structural Engineering,2020,23(7):1-16.
[13] 孙崇芳，梁书亭，朱筱俊.新型预制装配式楼盖人行荷载下舒适度试验研究[J].建筑结构，2014,44(13):19-23.
[14] 庞瑞，王文康，张天鹏，等.踮脚和跳跃荷载下全装配式RC楼盖振动特性试验研究[J].工程力学，2020,37(11):209-218,256.
[15] PAPAGIANNOPOULOS G A,HATZIGEORGIOU G D.On the use of the half-power bandwidth method to estimate damping in building structures [J].Soil Dynamics and Earthquake Engineering,2011,31(7):1075-1079.
[16] 建筑楼盖结构振动舒适度技术标准：JGJ/T 441—2019[S].北京：中国建筑工业出版社，2020.
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Research on influence of slab joint connector on vertical vibration characteristics of untopped precast RC floor
Abstract: To study the influence of the slab joint connectors in discretely connected precast RC diaphragm(DCPCD) on the vibration characteristics of the floor, a comparative test of two DCPCD specimens and a cast-in-situ slab specimen under the condition of four-sided simply supported was carried out. The modal test was carried out on three specimens by the hammering method to study the influence of the slab joint connectors on the modal parameters such as the modal shape, damping ratio and natural frequency of the DCPCD. A variety of pedestrian load excitations were applied to study the influence of the slab joint connectors on the vibration response of the DCPCD. The results show that the slab joint connectors can effectively improve the integrity of the DCPCD, reduce the structural damping ratio, increase the natural frequency, and greatly reduce the vibration acceleration. Comparing the theoretical method of DCPCD natural frequency and peak acceleration based on the vibration theory of orthogonal two-way anisotropic plate, it is in good agreement with the experimental value. The influence of different boundary support conditions on the serviceability of DCPCD was analyzed, and the DCPCD can meet the serviceability requirements by changing the boundary support conditions. Based on serviceability and economical considerations, it is recommended that the stiffness ratio between the orthogonal slab laying direction and the slab laying direction be between 0.3～0.75.
Keywords: untopped precast RC floor; dry connector; vibration characteristic test; serviceability; support condition; stiffness ratio
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