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

Kun Dong, Zheng-ang Sui, Jitong Jiang and Xianxiang Zhou
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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

Sustainability, 2019, vol. 11, issue 18, 1-19

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.

Keywords: structural strengthening; masonry wall; cycle loading; seismic performance; reinforced mortar (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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