具有弯剪分离受力特性的配筋齿槽连接装配式剪力墙抗震性能研究

In order to solve the problem that the seismic performance of precast shear wall is weak, based on the precast joint bending-reinforced tenon shear separate loading mode, a reinforced tenon was set at the precast shear wall position out of confinement edge area and the portion non-bonded reinforce rib technology was used, to form the reinforced tenon connecting precast shear wall. Afterward, scientific research methods of theoretical analysis, numerical simulation and experimental research were used to study the reinforced tenon connecting precast shear wall. By study on the reinforced tenon and the portion non-bonded reinforce rib, the mechanical properties and design methods should be obtained. The mechanical properties of the bending-shear separate loading mode will be studied at the whole precast wall level. And the bending-shear separation degree will be used as the evaluation parameter. Finally, the analysis model of bending-shear separate loading should be put forward. At the whole structure level, the seismic mechanism of the reinforced tenon connecting precast shear wall structure should be studied and its seismic performance should be evaluated. And finally, its design method should be put forward. This research will finally solve the following two key scientific problems: 1) the properties theoretical analysis model of interaction mechanism between shear wall and reinforced tenon, 2) the influencing factors, the calculation model, the calculation formula and the reasonable value of the bending-shear separation degree. Integrate and improve the reinforced tenon and the portion non-bonding rib technology is the structure innovation of this project and the use of the bending-shear separate loading mode is the research idea innovation of this project. It is expected that through the study the problem of weak seismic performance of precast shear wall will be solved and its application will be popularized.

为解决装配式剪力墙抗震性能薄弱的问题，基于拼缝抗弯-配筋齿槽抗剪的分离受力模式，在装配式剪力墙非边缘约束构件部位设置配筋齿槽，连接钢筋采用部分无粘结，形成了配筋齿槽连接装配式剪力墙，并采用理论分析、数值模拟和试验研究的科学方法对其开展研究。对配筋齿槽和连接钢筋进行研究，掌握其力学性能，并提出设计方法；在构件层次研究弯剪分离受力的力学特性，并采用弯剪分离度作为评价参数，最终提出剪弯分离受力的分析模型；在结构层次，研究配筋齿槽连接装配式剪力墙结构的抗震机理，评价其抗震性能，提出其设计方法。最终解决两个关键科学性问题：1）配筋齿槽和装配式墙体的相互作用特点及其理论分析模型；2）弯剪分离度的影响因素、计算模型、计算公式及合理取值。整合并改进配筋齿槽和钢筋部分无粘结技术是本项目的结构创新，采用弯剪分离的受力模式是本项目的研究思路创新。通过研究有望解决装配式剪力墙抗震性能较弱的难题，实现其推广应用。

装配式剪力墙拼缝在内力作用下易出现拼缝相对滑移，进而对纵向连接钢筋产生销键剪切应力而影响装配式剪力墙抗震性能的充分发挥。本项目根据装配式剪力墙的受力特点，在装配式剪力墙的非边缘约束构件部位底部设置配筋齿槽来提高装配式剪力墙的抗震性能：配筋齿槽集中抵抗拼缝剪力，从而降低纵向连接钢筋的销键剪切应力；边缘构件部位的普通和部分无粘结段纵向连接钢筋集中承受弯矩产生的拉压内力，从而实现装配式拼缝部位的弯剪分离受力，简化装配式剪力墙拼缝的受力机理并提高其抗震性能。.本项目采用理论分析、数值模拟和试验研究的科学方法，对配筋齿槽装配式剪力墙进行了研究，深入掌握了其力学性能，并提出了配筋齿槽装配式剪力墙的设计方法。对配筋齿槽装配式剪力墙的数值模拟和试验研究结果表明：配筋齿槽能够降低装配式剪力墙拼缝的界面相对滑移，配筋齿槽高度和纵向连接钢筋的部分无连接段对配筋齿槽装配式剪力墙的滞回耗能性能有重要的影响，合理的设置齿槽高度能够有效提高装配式剪力墙的抗震性能。采用等效桁架模型理论对配筋齿槽的抗剪承载力进行了分析，并确定了弯剪分离度的计算方法，配筋齿槽的设计应满足弯剪分离度的要求：配筋齿槽的承载力不应低于装配式剪力墙的抗剪承载力，即弯剪分离度不低于1.0，并应对齿槽及剪力墙凹槽的角部进行加强。通过对配筋齿槽装配式剪力墙的制作实践经验进行总结，提出配筋齿槽同步灌浆的施工方法，并采用高强灌浆料替代齿槽后浇混凝土，进一步改善配筋齿槽的施工工艺并提高其抗剪性能。最后，进一步完善了等效整体装配式剪力墙结构数值模拟分析方法，并完成了配筋齿槽装配式剪力墙整体结构及其他装配式建筑案例的抗震性能评价。.综合上述研究成果：本项目的研究具有较强的创新性，其研究内容具有较高的理论意义和应用价值，研究方法科学合理，取得的研究成果丰厚详实且应用前景广发，为高层装配式剪力墙结构抗震性能的提高和改善提供了重要的研究依据。