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Experimental Study on Seismic Behavior of Masonry Walls Strengthened by Reinforced Mortar Cross Strips

Author

Listed:
  • Kun Dong

    (Department of Civil Engineering, Ocean University of China, 266100 Qingdao, China)

  • Zheng-ang Sui

    (Department of Civil Engineering, Ocean University of China, 266100 Qingdao, China)

  • Jitong Jiang

    (Department of Civil Engineering, Ocean University of China, 266100 Qingdao, China)

  • Xianxiang Zhou

    (Institute of Defense Engineering, Academy of Military Science, The People’s Liberation Army, Beijing 100850, China)

Abstract

Due to the poor seismic performance, strengthening of masonry structures is always a significant problem worthy to study. It has been proven that the bearing capacity of existing masonry buildings can be enhanced greatly with efficient strengthening measures. An experimental program was conducted to investigate seismic performance of un-reinforced masonry (URM) walls strengthened by reinforced mortar (RM) cross strips. Eleven walls were tested under horizontal low-cyclic load, simultaneously with a vertical constant load on the top face. Three URM walls were tested as reference. The other eight walls were externally strengthened with 40 and 60 mm thick of RM cross strips on one or both faces. Test results showed that externally strengthening with RM cross strips was an efficient way to enhance the seismic performance of URM walls. The failure modes were divided into shear failure and shear-compression failure. All the tested walls did not collapse until the test ended, while many diagonal cracks and few vertical cracks appeared on mortar strips. After strengthening, the shear capacity of the strengthened walls increased by at least 38.2%, and the reinforcement ratio was noted to be the key factor to influence the shear capacity with positive correlation. Besides, RM cross strips did improve deformation capacity greatly.

Suggested Citation

  • Kun Dong & Zheng-ang Sui & Jitong Jiang & Xianxiang Zhou, 2019. "Experimental Study on Seismic Behavior of Masonry Walls Strengthened by Reinforced Mortar Cross Strips," Sustainability, MDPI, vol. 11(18), pages 1-19, September.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:18:p:4866-:d:264632
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    Cited by:

    1. Marie Kozielova & Lucie Mynarzova & Petr Mynarcik, 2020. "Experimental Testing of Masonry Subjected to Concentrated Load in Direction of Bed Joints," Sustainability, MDPI, vol. 12(22), pages 1-15, November.

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