预应力加固无筋砖砌体墙体抗震性能试验研究

发布时间：2018-01-04 00:37

本文关键词：预应力加固无筋砖砌体墙体抗震性能试验研究　出处：《北京建筑大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文进行了后张预应力加固无筋砖砌体墙体抗震试验研究,并通过有限元参数化分析进行了对比验证,在此基础上提出预应力加固无筋砌体墙体的抗剪承载力公式。最后结合试点工程探讨了后张预应力加固技术的施工工艺。进行了9片无筋砖墙在水平低周反复荷载下的全过程对比试验研究,其中2片砖墙为未加固墙体,7片砖墙为采用后张预应力加固的墙体。分别对比分析了加固墙片与未加固墙片受力性能与破坏特点。试验结果表明经过预应力钢筋加固后砌体墙片抗震性能显著提高。该加固技术是一种行之有效的砌体结构抗震加固方法。并且在试验的基础上提出预应力砌体刚度退化模型以及承载力计算建议公式。采用MSC.MARC通用有限元分析软件对试验墙体进行了模拟计算,计算所得骨架曲线与试验结果吻合较好。在此基础上,进行了预应力加固无筋砖墙与预应力加固带洞口砖墙的变参数有限元分析。并提出了预应力加固无筋砌体墙体的抗剪承载力计算公式,同时对预应力加固设计提出了建议。通过通州区o7县镇农村住宅的抗震加固示范工程,介绍了该项技术的施工工艺。该施工工艺具有良好的经济性;湿作业少,施工过程中产生的噪音少,粉尘小,对外部环境影响也较少;加固后不影响建筑的使用面积,几乎不影响原有结构与装饰,不破坏房屋的美观性;是一种施工简便、经济合理、加固效果明显的砌体加固技术,值得在城镇砌体建筑抗震加固工程中大力推广。
[Abstract]:The post tensioned prestressed reinforcement of unreinforced brick masonry wall seismic test, and the results are verified by finite element analysis, on the basis of the formula of shear bearing capacity of unreinforced masonry wall strengthened with prestressed. Finally, the pilot project discusses the construction technique of post tensioned prestressed reinforcement technology. Experimental study on the whole process comparison of 9 pieces of masonry under low cyclic loads, in which 2 pieces of brick wall for the unreinforced wall, 7 brick walls with post tensioned prestressed reinforcement wall. Analyzing and comparing the reinforcement wall with solid wall mechanical properties and damage characteristics. Experimental results show that the prestressed reinforcement after strengthening seismic performance of masonry walls increased significantly. The reinforcement technique is an effective method of strengthening masonry structures. And put forward the prestressed masonry stiffness back on the basis of experiments Model and calculation of bearing capacity of the wall. The proposed formula test was simulated by the finite element analysis software MSC.MARC, calculated the skeleton curves agree well with the experimental results. On this basis, the prestressed masonry reinforcement and prestressed variable parameter finite element analysis with hole wall reinforcement. And put forward the reinforcement masonry shear strength calculation formula of prestressed reinforcement, and puts forward some suggestions on the design of prestressed reinforcement. Through the town of O7 in Tongzhou District County Rural Residential Seismic Strengthening demonstration project, introduces the construction process of the technology. The construction process has a good economy; less wet operations, the construction process produces less noise dust, small impact on the external environment is less; reinforcement does not affect the use of building area, almost does not affect the original structure and decoration, without destroying the appearance of the house is; The masonry strengthening technology with simple construction, reasonable economy and obvious reinforcement effect is worth popularizing in the earthquake resistant and strengthening project of urban masonry buildings.

【学位授予单位】：北京建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU364;TU352.11

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