四边不出筋墙板节点滞回性能研究

发布时间：2018-08-05 12:55

【摘要】：为保证抗震性能,传统方法将预制板底受力钢筋端部伸入叠合楼板与剪力墙或梁连接节点内部,该方法存在运输与施工不便等缺点。为此标准图集中给出了新型四边不出筋板的连接节点构造,四边不出筋板不需在模板上预留孔洞,降低了加工难度,解决了预制板底钢筋在运输和堆放过程中易弯折和锈蚀的难题。研究、推广叠合板底板四边不出筋节点,符合可持续发展原则。为了推广新型不出筋叠合板在抗震地区的应用,需要对其抗震性能进行研究。本文设计制作了6组不出筋板墙板节点、1组出筋板节点及1组现浇墙板节点,并对各组墙板节点进行低周往复加载试验,通过各组墙板节点耗能能力、延性等抗震性能指标进行对比分析,对新型不出筋板墙板节点的抗震性能进行了探究和评价,主要包括以下几部分内容:1.附加筋长度对不出筋墙板节点的抗震性能的影响研究设置长附加筋板节点和常规附加筋板节点对照组及开槽长附加筋板节点和开槽短附加筋板节点对照组,其中长附加筋较常规附加筋板伸入节点区域长度更长,长附加筋较短附加筋伸入节点长度及留置叠合板长度均更长。对四组墙板节点的滞回性能进行比较与分析,探究附加筋长度对节点抗震性能的影响。试验结果表明,附加筋伸入节点长度越长,节点抗震性能越好。2.附加筋布置方式对不出筋板节点抗震性能的影响研究设置开槽长附加筋板、长附加筋板墙板节点及开槽短附加筋板、短附加筋板墙板节点对照组。对四组墙板节点的滞回性能进行比较与分析,探究附加筋布置方式对节点抗震性能的影响。试验结果表明:开槽布置能显著提高长附加筋板节点的承载力、耗能能力及延性。3.不出筋板、出筋板及现浇板墙板节点的抗震性能对比研究在前期对比研究基础之上,将开槽长附加筋板墙板节点与无附加筋不出筋板、出筋板以及现浇墙板节点的滞回性能进行对比分析,给出新型不出筋板墙板节点抗震性能的客观评价。实验结果表明:开槽长附加筋板节点耗能能力较强,承载力较高且变形能力最强,延性较好,抗震性能最优,明显优于出筋板节点,与现浇墙板节点较为接近。长附加筋开槽布置不出筋板可实际代替出筋板节点,且因其制作、运输及存放方便,值得在装配式混凝土结构中大力推广。
[Abstract]:In order to ensure seismic performance, the traditional method extends the end of steel bar on the bottom of prefabricated slab into the joint of composite floor slab and shear wall or beam, which has some disadvantages such as inconvenient transportation and construction. For this reason, a new type of joint construction of four edge plate without reinforcement is given in the standard atlas, and no holes need to be reserved in the template, so the processing difficulty is reduced. The problems of bending and rusting in the transportation and stacking process of the steel bar at the bottom of the prefabricated slab are solved. The research and extension of the joint with no reinforcement on the four sides of the composite plate bottom plate are in accordance with the principle of sustainable development. In order to popularize the application of new unstiffened laminated plate in seismic area, the seismic performance of composite plate should be studied. In this paper, six groups of unstiffened plate nodes and 1 group of cast-in-place wall board nodes are designed and manufactured, and the low-cycle reciprocating loading tests are carried out on each group of wall board nodes, and the energy consumption capacity of each group of wall board nodes is obtained. By comparing and analyzing the seismic performance indexes such as ductility and so on, the seismic performance of the new type of unstiffened panel joints is explored and evaluated, including the following parts: 1. The effect of the length of additional reinforcement on the Seismic performance of joints with unstiffened Wall Plate; the control group of joints with long additional reinforcement plate and conventional additional reinforcement plate and the control group of slotted long additional reinforcement plate and slotted short additional stiffened plate node. The length of the long additional reinforcement is longer than that of the conventional additional reinforcement plate, and the length of the long additional reinforcement is longer than that of the short additional reinforcement and the length of the retention superimposed plate. The hysteretic performance of four groups of wall plate joints is compared and analyzed, and the influence of the additional reinforcement length on the seismic performance of the joints is explored. The experimental results show that the longer the joint length is, the better the seismic behavior of the joint is. 2. Study on the effect of the arrangement of additional reinforcement on the Seismic performance of Node without reinforcement the slotted long reinforced plate the long additional stiffened plate wall plate node and the slotted short additional reinforcement plate and the control group of the short additional reinforced plate wall board node are set. The hysteretic performance of four groups of wall plate joints is compared and analyzed, and the effect of additional reinforcement arrangement on seismic performance of joints is explored. The experimental results show that the slotted arrangement can significantly improve the bearing capacity, energy dissipation capacity and ductility of long additional stiffened plate joints. Comparative study on Seismic performance of Nodal joints of unstiffened Plate, reinforced Plate and Cast-in-situ Plate; on the basis of the previous comparative study, the slotted long additional stiffened panel and the unreinforced plate with no additional reinforcement, The hysteretic performance of the joint of the reinforced plate and the cast-in-place wall plate is compared and analyzed, and the objective evaluation of the seismic performance of the new type of unstiffened panel joint is given. The experimental results show that the slotted long additional stiffened plate joints have stronger energy dissipation capacity, higher bearing capacity, stronger deformation capacity, better ductility, and better seismic performance, which are obviously superior to those of the stiffened plate joints and are close to the cast-in-place wall plate joints. The slotted plate with long additional reinforcement can actually replace the joint of the stiffened plate, and because of its convenient manufacture, transportation and storage, it is worth popularizing in the prefabricated concrete structure.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11

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