带洞口配筋混凝土砌块墙梁的受力性能试验研究-结构工程专业论文.docx

Classified Index: TU365 U.D.C: 624.012.44 Dissertation for the Master Degree in Engineering EXPERIMENTAL STUDY ON MECHANIC PERFORMANCE OF REINFORCED CONCRETE BLOCK WALL BEAM WITH HOLE Candidate:Guo YanfengSupervisor: Associate Prof.Academic Candidate: Guo Yanfeng Supervisor: Associate Prof. Academic Degree Applied for: Master of Engi Specialty: Structural Engi Affiliation: School of Civil Date of Defence: July，2007 Degree-Conferring-Institution: Harbin Institut e of Technology 摘要 摘要 - - I - 摘要 混凝土小型空心砌块符合节土、节能的墙改方向，成为替代粘土实心砖 的首选新型墙体材料，具有广阔的应用前景。配筋砌块墙梁作为混凝土配筋 砌块剪力墙结构中的竖向受力构件，不仅可通过芯柱及配筋提高托梁与砌块 墙体的整体工作性能，还能够降低托梁的高跨比，增大底层的使用空间，从 而带来良好的经济效益和社会效益。因此对该类构件进行承载力的试验和理 论研究既有实际工程意义，同时又对配筋砌块砌体结构体系的完善起到积极 的促进作用。 本文通过五个均布荷载下简支带洞口配筋砌块墙梁和一个无洞口配筋砌 块墙梁的试验，了解了墙梁的受力与变形性能、破坏过程与形态等特征，考 察了洞口的大小、位置和托梁高度等因素对承载力的影响，并对托梁纵筋和 灌芯砌块墙体内的分布钢筋应力进行了加载全过程记录。试验结果表明，带 洞口配筋混凝土砌块墙梁的工作模式为拉杆拱，托梁在高跨比为 1/10 的基 础上仍有进一步降低梁高的可能性。 将有限元分析软件 ANSYS 应用到配筋砌块墙梁的受力分析中，在单元选 取、模型建立、参数设置及单元划分等方面得到可靠验证的基础上，进行了 扩大参数分析，研究了砌块墙梁的受力机理及不同因素（墙体强度、洞口大 小、洞口位置、托梁纵筋配筋率、跨度）对承载力的影响。借鉴混凝土深梁 及砌体结构中有关墙梁的承载力计算公式，并结合本文的试验与有限元分析 结果，给出了适合于配筋砌块墙梁的承载力计算方法。 关键词 配筋砌块砌体；墙梁；承载力；有限元；洞口 哈尔滨工业大学工学硕士学位论文 哈尔滨工业大学工学硕士学位论文 - - II - Abstract Small hollow concrete block is used as a substitute for fired clay brick for it has many advantages such as soil-saving and energy-saving, which also brings bright outlook for its development as a new type of building materials. As perpendicular bearing members in the concrete block shell wall structure, reinforced block wall beam can not only increase the integrality of masonry wall and trimmer beam through core column and rebar, but also can reduce the trimmer beam’s depth-span ratio, it can increase the ground floor’s used space, and bring more economic and social benefit. So the study on capacity subjected to eccentric load by experiment and theoretical analysis is active to practical application and perfect of reinforced masonry structure. In this paper, the 5 wall beams with hole and 1 without hole made of reinfo