异形截面暗柱单排配筋保温砌模剪力墙抗震机理研究

The seismic performance of traditional multi-story masonry structure is weak. Since the limit of shear wall thickness and its reinforcement construction high-rise building, if the construction code of high-rise building shear wall were applied to the multi-story shear wall structure directly, it would make the cost of multi-story buildings higher and the shear wall thicker and it is difficult to be used widely. Hence, it is very necessary in the practical project to develop a residential structural system which can simplify the reinforcement of multi-story shear wall, make its construction easier, replace the traditional concrete frame work with heat preservation blocks, have good seismic performance and also be an integrative system with both seismic performance and energy dissipation capacity. This project proposed one new RC shear wall structure with single row of steel bars and special shaped concealed column system used for multi-story structures. The new structure system has stronger seismic performance than multi-story masonry structure, avoids the influence of that the corner of the frame structure columns outstanding to the indoors view, has the advantage of aseismic and energy saving integration. The seismic experiments of the new RC shear wall structure will be systematically carried out under low frequency cyclic loading to study the bearing capacity, stiffness, ductility, hysteretic behavior, energy consumption and failure characteristics. The finite element analysis model will be created based on the results of the seismic experiments. To analysis the damage evolution and reveal the seismic mechanism of the new shear wall structure the numerical simulation analysis will be carried out with the created finite element model. The design parameters will be optimized, the capacity model and restoring force model will be proposed, the seismic design methods and the structural measures will be given. All these achievements will provide basis for future engineering applications.

传统多层住宅砌体结构抗震能力较差。高层住宅剪力墙结构对墙体厚度的限制及其配筋构造，在多层剪力墙结构中直接套用存在造价较高、墙体较厚，难以推广的问题。在多层剪力墙结构中，研发一种简化配筋，易于施工，用永久性保温砌模代替传统模板，具有良好抗震性能，抗震节能一体化的住宅结构体系已成工程亟需。本项目提出了异形截面暗柱单排配筋保温砌模剪力墙住宅结构体系，具有比砌体住宅结构抗震能力强，克服框架结构室内出柱楞的弊端，抗震节能一体化的特点。将较系统的进行这种新型剪力墙的低周反复荷载抗震性能试验，研究承载力、刚度、延性、滞回特性、耗能和破坏特征，建立有限元分析模型，进行数值模拟，分析损伤演化过程，揭示抗震机理，优化设计参数，提出承载力模型和恢复力模型，给出抗震设计方法与构造措施，为工程应用奠定基础。

提出并研发了异形截面暗柱单排配筋保温砌模剪力墙结构，获得了国家发明专利。将保温模块、单排配筋、再生混凝土三者优势组合，形成了一种简化配筋、易于施工、适用于村镇低多层建筑的抗震节能一体化剪力墙结构。进行了6个足尺剪力墙试件的低周反复荷载试验，研究了高宽比、混凝土强度、墙体配筋、模块孔洞、面层砂浆对剪力墙受力性能的影响；分析了各试件的承载力、刚度、延性、滞回特性、耗能和破坏特征，阐明了试件损伤演化过程；揭示了面层砂浆-保温砌模-混凝土墙体共同工作机理；建立了受剪承载力计算模型与公式，计算结果与实测结果符合较好；提出了符合异形截面暗柱单排配筋保温砌模剪力墙构造特点的有限元分析模型，用ABAQUS软件进行了数值模拟，模拟所得墙体损伤特征及受力-变形曲线与试验符合较好。提出了格构配筋再生混凝土异形柱框架-轻质填充墙结构，进行了4个格构配筋再生混凝土异形柱框架-粉煤灰砌体填充墙结构的低周反复荷载试验，异形柱分为L形、T形两种截面，框架分为普通框架和带支撑框架两种。分析了各试件的承载力、刚度、延性、滞回特性、耗能和破坏特征，发现了损伤破坏的薄弱部位，阐明了屈服机制。