斜拉筋加固砌体结构伪静力试验研究

Investigation of masonry structures strengthened by the diagonal steel bar by means of pseudo-static test

对普通砖砌体应用斜拉筋加固技术,在低周反复荷载作用下就加固砖砌体的抗震性能进行试验研究,分析结构的滞回特性、骨架曲线、延性系数、耗能能力以及刚度退化等指标的变化规律.结果表明,随着斜拉筋配筋量的增大,试件的开裂荷载和极限荷载均得到提高,结构耗能能力和延性系数增加,墙体破坏形态由脆性到延性转变.斜拉筋加固作为砌体结构加固的一种新技术被提出.

In the application of the strengthening technology ot diagonal araw steel bar was then the block walls and aseismatic behavior of strengthened block walls was experimentally investigated under low cycle reversal loads. Analysis of earthquake resistance performance of masonry, including hysteretic behavior, skeleton curves, ductility coefficient, energy dissipation capacity, and stiffness degradation was conducted. The test result indicated that, when the quantity of reinforcement was increased, the structural cracking load and ultimate load would increase; energy dissipation capacity and ductility coefficient would also increase, the destruction form of structure would change from brittle to ductile one. The strengthening technology of diagonal draw steel bar was proposed as a new technology of block wall strengthening.