无砂浆配筋砌块砌体剪力墙结构的抗震性能研究

Reinforced masonry shear wall is an assembled monolithic concrete shear wall structure. The advantages of this structure are its ease of construction, the savings of formwork and steel reinforcement, as well as its cost effectiveness. Instead of traditional mortar joint, the mortarless block masonry system uses geometrical interlocking of blocks to fulfil the conjunction of the blocks. This reduces the complexity of construction of the structure, offers the possibility of substantial savings in construction time and labour costs, and greatly improves the construction speed and the construction quality. The applicant merges the mortarless block masonry into reinforced block masonry shear wall structure to generate the so-called Mortarless Reinforced Block Masonry Shearing Wall Structure. This new structure achieves an optimized utilization of the merits of both mortarless block masonry and reinforced block masonry shear wall structure regarding to their engineering and social values. The applicant plans to perform basic mechanical experiments of grouted mortarless block masonry and seismic performance test of mortarless reinforced block masonry shear wall structures. The experimental investigations will be accompanied by corresponding theoretical analysis in order to develop the analytical model for this structure. Then recommendations derived from this study will provide the basis for design of mortarless reinforced block masonry shearing wall structure.

配筋砌块砌体剪力墙结构是一种装配整体式混凝土剪力墙结构，具有墙体无需模板、施工速度快、节约钢筋、工程造价低等优点。无砂浆砌块砌体体系是一种用块体的几何连锁代替砂浆砌筑来达到砌块之间连接的砌体体系，它降低了施工复杂性，节约了材料和人工成本，加快了施工速度，提高了施工质量。项目申请人将无砂浆砌块砌体体系引入到配筋砌块砌体剪力墙结构，形成无砂浆配筋砌块砌体剪力墙结构，以充分利用配筋砌块砌体剪力墙结构和无砂浆砌块砌体体系的优势，发挥两者的工程价值和社会价值。项目申请人拟进行灌孔无砂浆砌块砌体的基本力学性能试验和无砂浆配筋砌块砌体剪力墙结构的抗震性能试验，并建立适合无砂浆配筋砌块砌体剪力墙结构的分析模型和基于性能的抗震设计方法。本研究将为无砂浆配筋砌块砌体剪力墙结构的设计提供充分的理论依据。

无砂浆配筋砌块砌体剪力墙结构是一种装配整体式混凝土剪力墙结构，同时具有配筋砌块砌体剪力墙结构和无砂浆砌块砌体体系的优势，具有墙体无需模板、施工速度快、节约钢筋、工程造价低、施工工艺简单和施工质量易保证等诸多优点。. 首先对无砂浆灌孔砌块砌体的基本力学性能进行试验研究， 制作了普通砌块有砂浆砌体、普通砌块无砂浆砌体、双排孔有砂浆砌块砌体及双排孔无砂浆砌块砌体的受力性能试验，得到了无砂浆砌块砌体的开裂强度、破坏极限强度以及最终破坏形态。试验结果表明，该砌体抗压、抗剪强度满足规范要求，建立了无砂浆砌块砌体的受压本构模型，及相对应的剪强度计算式。通过用有限元分析软件建立整体式模型，分析无砂浆砌块砌体受力过程，有限元的分析结果与试验值和规范值均比较接近，有限元应力云图基本反映了试验实际破坏形态。. 在此基础上，分别对单排孔和双排孔无砂浆配筋砌块砌体剪力墙结构在低周反复水平荷载作用下进行力学性能试验研究。将无砂浆配筋砌块砌体剪力墙的极限承载力试验值和配筋砌体剪力墙的承载力规范值进行了对比，砌体规范公式计算的配筋砌体剪力墙极限承载力与本文无砂浆配筋砌块砌体剪力墙的试验值相差不大，说明无砂浆配筋砌块砌体剪力墙的极限承载力与配筋砌体剪力墙的极限承载力接近。. 提出适合无砂浆配筋砌块砌体剪力墙结构的数值分析模型，采用整体式模型无砂浆配筋砌块砌体剪力墙进行动限元分析，分析其地震反应并与试验结果进行比较。. 最后，建立了无砂浆配筋砌块砌体剪力墙基于性能的抗震设计方法，提出了相应的性能指标，为今后的研究提供了试验及理论依据，对实际工程应用有指导作用。