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为解决带构造柱砖砌体墙体在地震作用下易开裂、易发生脆性破坏等抗震性能差的问题,提出了一种新型后张预应力加固带构造柱砖砌体方法。为验证该方法的加固效果,进行了8片带构造柱砖砌体墙片在水平低周反复荷载下的试验,包括1片无预应力筋加固的对比墙片;7片均匀布置不同对数预应力钢筋与不同竖向预应力的加固墙片。并进一步基于MSC.MARC有限元软件分析了其在单调位移加载下的受力形态。试验与有限元仿真结果共同表明该方法可以显著提高无筋墙体的抗剪强度与整体性能,从而显著提高其抗震能力。在验证有限元计算方法正确的基础上进行了有限元参数化分析,分析结果表明在预应力钢筋应力比为0.4时加固效果较好。
In order to solve the problem of poor seismic performance such as easy cracking and brittle failure under the action of earthquake, a new type of post-tensioned prestressed reinforcement structure with column brick masonry is proposed. In order to verify the reinforcement effect of this method, the tests of 8 columns of pillared brick masonry walls subjected to horizontal and low cycle repeated loads were carried out, including one contrasting wall without reinforcement of prestressed tendons; 7 uniform arrangement of different logarithms Prestressed reinforcement and different vertical prestressed reinforced walls. Furthermore, based on the MSC.MARC finite element software, the force morphology under monotonic displacement loading was analyzed. Experiments and FEM simulation results show that this method can significantly improve the shear strength and overall performance of the non-reinforced concrete wall, thus significantly improving its seismic capacity. Finite element parametric analysis was carried out on the basis of verifying the correctness of finite element method. The results show that the reinforcement effect is better when the prestressing stress ratio is 0.4.