【作者】 袁宇；

【导师】 傅剑平； 方志；

【作者基本信息】 重庆大学 ， 建筑与土木工程， 2012， 硕士

【摘要】 冷轧带肋钢筋自1968年在欧洲出现，至今已有近40年。用作焊接网也有35年左右的历史。由于三面带肋匀称的外形、与混凝土的粘结锚固性能好、加工矫直方便、强度提高而不需增加微合金元素，很快在欧洲大多数国家兴起应用，并迅速推广到全世界。至今，凡是用冷加工钢筋作焊接网的地方，几乎都采用冷轧带肋钢筋。这其中包括用在非抗震区及抗震区中的不同构件。冷扎带肋钢筋焊接网与手工绑扎的普通钢筋网相比，具有强度高、钢材省、施工方便、速度快、质量高、综合经济效益好等优点。由于冷轧带肋钢筋没有明显的屈服平台，变形能力较差，为提高配置冷轧带肋钢筋结构的延性，在普通冷轧带肋钢筋的基础上，目前已经研发出了具有一定延性的“高延性冷轧带肋钢筋”。其目的就是为了提高配置冷轧带肋钢筋构件的变形能力，从而提高整个结构的受力及抗震性能。当剪力墙采用这种具有一定延性的冷轧带肋钢筋焊接网片作为分布钢筋时，是否可以保证剪力墙具有所需要的变形能力和延性，还需要进行深入的研究。本项目通过7片配置高延性冷轧带肋钢筋焊接网片的剪力墙试件，考虑不同轴压比、不同跨高比、不同腹筋配置形式以及不同约束边缘构件配筋率对剪力墙抗震性能的影响，对高延性冷轧带肋钢筋焊接网片剪力墙的承载力、延性、耗能性能的影响进行分析研究。在试验研究的基础上，本文利用ABAQUS非线性有限元程序对本文试验的试件进行了非线性有限元分析。通过上述工作得出的主要结论如下：①对于配置高延性冷轧带肋钢筋网片的剪力墙，轴压比依然是影响剪力墙抗震能力的最主要因素之一。②工字型截面试件和带端头试件由于约束边缘区的有利作用，其综合抗震性能明显优于一字型截面试件。③在有抗震要求的剪力墙结构中，高延性冷轧带肋钢筋焊接网的钢筋强屈比不应小于1.15，均匀延伸率不应小于6%。更多还原

【Abstract】 Cold rolled ribbed steel bar since appeared in Europe in the1968, has been in thepast40years.Used for welding net also has35years of history.Due to a rib threesymmetrical shape, and concrete performance, convenient processing straightening,strength is improved without increasing the micro alloying elements, quickly rising inmost European countries, and quickly spread throughout the world.So far, all withcold-working steel in welded fabrics, almost always using cold-rolled ribbed steelbar.This includes the use of non seismic area and the seismic zone in the differentcomponent. Comparing Cold rolling ribbed steel bar welded mesh with manual bindingreinforced network, it has the advantages of high strength, steel Province, convenientconstruction, high speed, high quality, good comprehensive economic benefit etc..Because of cold rolled ribbed steel bar with no apparent yield platform, poordeformation ability. In order to improve the ductility of the structure using thecold-rolled ribbed steel bar, the common cold rolled ribbed steel wires and bars on thebasis of, at present has developed with certain ductility "high ductility of cold rolledribbed bar".Its purpose is to improve the deformation ability of component configuredby cold-rolled ribbed steel bar, so as to improve the seismic performance of the structure.When the shearwall using cold-rolled ribbed welded steel fabrics as distribution, how toensure the shearwall has a sufficiently large deformation capacity and ductility, stillrequires further study.This project through7piece shearwall specimens configured by high ductility ofcold-rolled ribbed welded steel fabrics, by considering the different axial compressionratio, different span depth ratio, different stirrups configuration and variousreinforcement ratio in confined boundary element，to make out the effects of suchfactors on the seismic behavior of the shearwall.The behavior include of bearingcapacity, ductility, energy dissipation and so on。From the7test pieces the main conclusions are as follows:①An H-shaped cross section of test piece and the belt end specimens due to theconstraint of marginal zone advantageous role, its comprehensive seismic performanceis better than the one I shaped cross section specimen②The configuration of high ductility of cold-rolled ribbed steel plate shear wall,axial compression ratio is still influence the shear wall seismic ability is one of the most important factors③In the seismic requirements of shearwall structure,the strain-hardening ratio ofhigh ductility cold-rolled ribbed steel bar should not be less than1.15, uniformelongation rate should be not less than6%.更多还原