Retrofitting is a technique wherein the damaged structure is strengthened to original design requirements. During 2001 Bhuj earthquake in Gujarat, India many open ground storey building damaged. So there is an urgent need for retrofitting of damaged buildings. This calls for techniques that are technically sound and economically feasible to upgrade deficient and damaged buildings. Also, Portland cement (PC) production is under critical review due to high carbon dioxide gas released to the atmosphere and Portland cement is also one among the most energy-intensive construction materials. So retrofitting of existing deficient building using eco-friendly material which could promise higher structural performance than the original building is required. The main contributions is development of retrofitting technique of seismically damaged building using Geopolymer concrete and Chevron steel bracing with passive energy dissipation devices. Experimental studies are carried out using the 4 m × 4 m tri-axial shake table test facility to evaluate the seismic performance of bare frame, Open ground storey building, X-plate retrofitted building, Shear wall retrofitted building. Two three storied half scale model buildings, one open ground storey (OGS) building and a bare frame building are tested for different earthquake inputs in the shake table. The acceleration spectrum of IS1893:2002, soft soil is used as seismic input for the above tests. The failure modes and crack pattern of buildings after the seismic test are analysed. The damaged OGS building after the shake table test is retrofitted. The local retrofitting of columns and beam-column joints in the ground storey is carried out using Geopolymer concrete. The global retrofitting of building is formulated with Chevron type steel bracing incorporating X-plate damper in the ground storey. Sweep sine tests on OGS building before and after retrofitting with X-shaped metallic damper is carried out. The natural frequencies and mode shapes of the models are evaluated. The retrofitted OGS building is again subjected to shake table test to the study the seismic performance under varying amplitude as per IS 1893:2002 ground motion. The same model buildings are analysed in SAP 2000 to predict the seismic performance of the retrofitted RC frames.An innovative technique of retrofitting the seismic damaged building using Geopolymer concrete and construction of shear wall is explored. Two Reinforced Concrete shear walls are constructed inside the open ground storey building as global retrofitting technique. Sweep sine test is carried out after retrofitting with shear wall. The fundamental frequency of open ground storey building increased from 3.75 Hz to 7.25 Hz due to the addition of shear wall. The pushover test on building is carried out. The pushover analysis is carried out to study the seismic response of reinforced concrete building with local and global retrofitting using SAP 2000 software. Comparison of experimental and analytical push over curves is plotted. A significant improvement in the strength and stiffness of the open ground storey building after retrofitting with shear wall is observed.

翻新是一种将损坏的结构加强到原始设计要求的技术。在2001年印度古吉拉特邦的普杰地震中，许多露天地面建筑物遭到破坏。因此，迫切需要对受损建筑物进行改造。这就需要技术上合理且在经济上可行的技术来升级缺陷和受损的建筑物。另外，由于释放到大气中的高二氧化碳气体，波特兰水泥（PC）的生产正受到严格​​审查，并且波特兰水泥也是最耗能的建筑材料之一。因此，需要使用环保材料翻新现有的缺陷建筑，以保证比原始建筑更高的结构性能。主要的贡献是开发了使用地质聚合物混凝土和雪佛龙钢支架以及无源消能装置对地震破坏的建筑物进行改造的技术。使用4 m×4 m三轴振动台测试设备进行了实验研究，以评估裸露框架，露天地面建筑物，X板翻新建筑物，剪力墙翻新建筑物的抗震性能。测试了两个三层的半比例模型建筑，一个露天地面（OGS）建筑物和一栋裸露的框架建筑物，以测试振动台中的不同地震输入。上述测试以IS1893：2002软土的加速度谱作为地震输入。分析了建筑物在地震作用下的破坏模式和裂缝模式。振动台测试后对受损的OGS建筑物进行翻新。地面层中的柱和梁柱节点的局部改造是使用Geopolymer混凝土进行的。建筑物的全球翻新是由雪佛龙型钢支撑在地面层中结合了X板阻尼器制定的。在使用X形金属阻尼器进行改造之前和之后，对OGS建筑物进行扫正弦测试。评估模型的固有频率和模态形状。改造后的OGS建筑物再次经受振动台测试，以根据IS 1893：2002地面运动研究在不同振幅下的抗震性能。在SAP 2000中对相同模型的建筑物进行了分析，以预测加固后的RC框架的抗震性能。探讨了使用地质聚合物混凝土加固抗震建筑物和剪力墙的创新技术。作为整体改建技术，在露天地面建筑物内建了两座钢筋混凝土剪力墙。用剪力墙改造后进行扫正弦测试。由于增加了剪力墙，露天地面建筑物的基本频率从3.75 Hz增加到7.25 Hz。进行了对建筑物的推覆测试。进行了推覆分析，以使用SAP 2000软件对钢筋混凝土建筑物的局部和整体改造进行地震响应研究。绘制了实验和分析推覆曲线的比较。观察到用剪力墙翻新后的露天地面建筑物的强度和刚度有了显着提高。用剪力墙改造后进行扫正弦测试。由于增加了剪力墙，露天地面建筑物的基本频率从3.75 Hz增加到7.25 Hz。进行了对建筑物的推覆测试。进行了推覆分析，以使用SAP 2000软件对钢筋混凝土建筑物的局部和整体改造进行地震响应研究。绘制了实验和分析推覆曲线的比较。观察到用剪力墙翻新后的露天地面建筑物的强度和刚度有了显着提高。用剪力墙改造后进行扫正弦测试。由于增加了剪力墙，露天地面建筑物的基本频率从3.75 Hz增加到7.25 Hz。进行了对建筑物的推覆测试。进行了推覆分析，以使用SAP 2000软件对钢筋混凝土建筑物的局部和整体改造进行地震响应研究。绘制了实验和分析推覆曲线的比较。观察到用剪力墙翻新后的露天地面建筑物的强度和刚度有了显着提高。进行了推覆分析，以使用SAP 2000软件对钢筋混凝土建筑物的局部和整体改造进行地震响应研究。绘制了实验和分析推覆曲线的比较。观察到用剪力墙翻新后的露天地面建筑物的强度和刚度有了显着提高。进行了推覆分析，以使用SAP 2000软件对钢筋混凝土建筑物的局部和整体改造进行地震响应研究。绘制了实验和分析推覆曲线的比较。观察到用剪力墙翻新后的露天地面建筑物的强度和刚度有了显着提高。