Experimental study on performance of UHPC-strengthened historical protected brick masonry load-bearing walls

被引：0
|
作者：
Wei S. [1 ]
Ma Y. [2 ]
Peng B. [1 ]
Zheng Q. [1 ]
Long L. [2 ]
Chen G. [1 ]
机构：
[1] School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai
[2] Shanghai Construction No. 2 (Group) Co. Ltd, Shanghai
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2018年 / 39卷
关键词：
Bearing wall; Brick masonry; Failure mode; Historical building; Quasi-static test; Shear capacity; Strengthening; UHPC;
D O I：
10.14006/j.jzjgxb.2018.S2.039
中图分类号：
学科分类号：
摘要：
To study the effect of ultra-high-performance concrete (UHPC) on strengthening of brick walls in historical buildings, two low-strength brick wall specimens were constructed using bricks obtained from a historical building and mortars mixed following the original design method of the building. One of the walls was directly loaded to fail by quasi-static test, and strengthened by UHPC layer in-situ, and then loaded to fail by quasi-static test again. The other wall was strengthened by UHPC layer after construction, and then loaded to fail by quasi-static test. Under the same load protocol, the horizontal load capacity of the unstrengthened test specimen was 41. 4 kN, and those of the strengthened test specimens were 134.0 kN and 167.0 kN. It is found that the bearing capacity and stiffness of the UHPC strengthened wall without damage are increased by 130% and 216%. Shear failure modes don't occur since the walls crack horizontally at the bottom. The existing damage of the target wall has an influence on the strengthening effect of the UHPC layers. In this study, It is not suitable to use the calculation method for reinforced concrete reinforcement in the code for the shear capacity of low-strength brick walls strengthened by UHPC surface layer. © 2018, Editorial Office of Journal of Building Structures. All right reserved.
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页码：284 / 289
页数：5
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