|Table of Contents|

Influence of Mortar Thickness and Cement Mortar Surface Strengthening on Behavior of Masonry Structure in Historical Buildings(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年01期
Page:
67-74
Research Field:
Publishing date:

Info

Title:
Influence of Mortar Thickness and Cement Mortar Surface Strengthening on Behavior of Masonry Structure in Historical Buildings
Author(s):
SHI Jian-guang1;  ZHENG Xue-feng1;  LIN Shu-zhi1; 2;  XIE Yi-ren3
(1. School of Architecture and Civil Engineering, Xiamen University, Xiamen 361005, Fujian, China; 2. Xiamen Construction Bureau, Xiamen 361005, Fujian, China; 3. Xiamen Hordor Engineering Design Group Co., Ltd., Xiamen 361004, Fujian, China)
Keywords:
historical building;  mortar replacement;  masonry strengthening;  shear-compression test;  mortar thickness;  mortar surface
PACS:
TU362
DOI:
10.19815/j.jace.2019.01017
Abstract:
On the premise of guaranteeing the principle of minimum intervention, the method of replacing mortar to strengthen masonry structure was put forward to solve the problem of insufficient safety of masonry structure in historical buildings caused by deterioration of mortar performance. Taking the masonry structure of Gulangyu historical building as the engineering background, the existing mechanical properties of the structure were simulated, and six masonry specimens were designed considering the influence of different mortar thickness and the masonry structure strengthened with single or double-faced cement mortar on the behavior of the masonry structure in historical buildings. The shear-compression composite test was carried out. The results show that the mortar thickness has a significant effect on the shear resistance of masonry structures when the mortar replacement depth is 40 mm. The bearing capacity of specimens with 5 mm mortar thickness is 68.6% lower than that with 10 mm mortar thickness, while that with 20 mm mortar thickness is 8.7% lower than that with 10 mm mortar thickness. Without mortar replacement, the bearing capacity of specimens coated with single cement mortar is 13.4% higher than that of specimens without strengthening, and that of specimens coated with double cement mortar is 19.6% higher than that of specimens without strengthening. The mortar thickness and the strengthening with single-faced or double-faced cement mortar have significant effects on masonry structure. These effects need to be considered when using replacement mortar to strengthen masonry structure. The test results can provide some reference for the strengthening of masonry structure in historical buildings.

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Last Update: 2020-01-13