【作者】 陈明；

【导师】 蒋庆； 张晓飞；

【作者基本信息】 合肥工业大学 ， 建筑与土木工程（专业学位）， 2020， 硕士

【摘要】 本文提出将保温板集成于预制外叶板内,形成一种新型自保温叠合板式剪力墙,实现了叠合板式剪力墙的承载与保温一体化。此时,剪力墙的受力部分由预制内叶板和现浇部分组成,仅存在一个新老混凝土的叠合面。此外,水平拼缝部位纵筋的连接方式,为一侧间接搭接,另一侧直接搭接,与传统的叠合板式剪力墙全部纵筋同时在水平拼缝上方间接搭接相比,可一定程度上降低纵筋连接区域的超强现象,从而减小墙体在水平拼缝附近的塑性变形。本文对所提出的自保温叠合板式剪力墙进行拟静力试验和数值模拟,主要研究内容如下:1.设计4个试件进行拟静力试验,包括:1个足尺现浇剪力墙,2个足尺自保温叠合板式剪力墙和1个无保温叠合板式剪力墙,试验结果表明:自保温叠合板式剪力墙和现浇剪力墙的破坏过程和破坏模式相似,均是在墙板和基础拼缝处首先开裂,之后弯曲和弯剪裂缝逐渐向上发展,此后墙板底部受拉纵筋屈服,受压区混凝土被压碎而破坏;边缘构件尺寸和配筋率较小的自保温叠合板式剪力墙墙板内裂缝较其余3个试件少,拼缝处水平通缝开展宽度较大,表明此试件水平拼缝附近的塑性变形较集中;在自保温叠合板式剪力墙试件中,裂缝沿剪力墙厚度方向,由内侧的内叶板开始一直延伸至保温板外侧,至试验结束时,混凝土外叶板上没有出现任何裂缝,因此,水平荷载作用下,混凝土外叶板参与工作的程度很小;轴压比相同的自保温叠合板式剪力墙、无保温叠合板式剪力墙和现浇剪力墙的刚度、承载力和延性基本相同;轴压比较小的自保温叠合板式剪力墙承载力较小,但延性系数和耗能能力均较大,所有试件极限位移角均大于我国规范规定的剪力墙结构在大震作用下的层间位移角限值1/120,具有良好的变形能力;采用《高层建筑混凝土结构技术规程》JGJ3-2010的承载力计算公式计算了所有试件的承载力,并将理论计算结果与试验结果进行比对分析,验证了公式的正确性。2.在试验研究的基础上,首先采用ABAQUS软件建立了4个试件的实体有限元模型,并通过试验结果验证了有限元模型的准确性;最后在经过验证的有限元模型基础上进行参数分析,研究了轴压比、边缘构件配筋率和混凝土强度对自保温叠合板式剪力墙抗震性能的影响,结果表明:自保温叠合板式剪力墙的极限承载力随轴压比、边缘构件纵向钢筋配筋率、混凝土强度等级的提高而增大。更多还原

【Abstract】 A new superimposed reinforced concrete shear wall with insulation(SRCSWI)is proposed in this paper by integrated the insulation panel into the precast exterior concrete panel to achieve the unity of loading and insulation.,.The cast-in-place reinforced concrete and precast intereior concrete panel are main carrying part.,and there only exists a superimposed surface of concrete.In addition,the connection method of the longitudinal reinforcement at the horizontal joints of the SRCSWI is the indirect splicing on one side and the direct splicing on the other side,Compared with the conventional superimposed reinforced concrete shear wall where all longitudinal reinforcements are indirect splicing above the horizontal joints,the over-strength phenomenon in the connection area of longitudinal reinforcements can be reduced to a certain extent,reducing the phenomenon of plastic deformation around horizontal joints.the experimental study and numerical analysis of the seismic performance of SRCSWI structure are carried out in this paper,the main research work of this paper includes the following contents.1.Four full sized specimens were designed to conduct pseudo-static tests,including one cast-in-place reinforced concrete shear wall(CRCSW)specimen,Two full-scale SRCSWI specimens and one full-scale superimposed reinforced concrete shear wall without insulation(SRCSW)specimen.Test results showed that the failure process and mode of the SRCSWI specimens are similar to CRCSW specimen,firstly,The cracks occurred at the horizontal joints,and then the flexural cracks and bending-shear cracks develop upwards gradually,after that the tensile reinforcement which is at the bottom of the wall yields,and the concrete in the compression zone is crushed and destroyed;for the SRCSWI with smaller size and reinforcement ratio of the boundary elements,fewer cracks occurred in the wall,while the opening width of the horizontal joint is relatively larger,indicating that plastic deformation of this specimen focused near the horizontal joints;For the SRCSWI specimens,the cracks along the thickness of shear wall are start from the interior concrete panel to the border between insulation and exterior concrete panel,at the end of the test,there is no crack on the exterior concrete panels,the exterior concrete panels hardly provided any contribution to the stiffness and capacity of the walls;for SRCSWI specimens,SRCSW specimen and CRCSW specimen with the same design axial load ratio,the stiffness,ductility and bearing capacity are comparative,while for SRCSWI specimen with smaller axial force,the bearing capacity is smaller but the ductility ratio and energy dissipating coefficient are larger than the other specimens,the ultimate displacement Angle of all specimens is greater than 1/120 of the limit value of the inter-layer displacement Angle of shear wall structures under the action of large earthquakes as stipulated in China,the specimens owe good deformation capacity;Based on the bearing capacity calculation formula of Technical specification for concrete structures of tall building(JGJ3-2010),the bearing capacity of all specimens was calculated,and the theoretical calculation results were compared with the experimental results,the correctness of the formula is verified.2.Based on the test,the solid finite element model of four specimens was established by ABAQUS software,and the accuracy of the finite element model was verified by the test results;Finally,the parameter analysis is carried out on the basis of the verified finite element model,The effects of the axial load ratio,longitudinal reinforcement ratio in the boundary element and concrete strength on the seismic performance of the SRCSWI were studied.The results show that the ultimate bearing capacity of SRCSWI increases with the increase of axial load ratio,longitudinal reinforcement ratio in the boundary element and concrete strength.更多还原