Robustness of hollow clay masonry units and seismic behaviour of masonry walls
Robustness of hollow clay masonry units and seismic behaviour of masonry walls
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DOI：
10.1016/j.conbuildmat.2005.05.001
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发表时间：
2006-12
影响因子：
7.4
通讯作者：
M. Tomaževič;M. Lutman;V. Bosiljkov
中科院分区：
文献类型：
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作者：
M. Tomaževič;M. Lutman;V. Bosiljkov
正如最近的实验研究表明，砌体单元的坚固性是定义砌体墙在承受地震荷载时的行为的最具决定性的参数之一。如果单元发生局部脆性破坏，砌体墙的行为机制和强度与延展性之间的已知关系就会发生变化。在这种情况下，尽管已考虑了规范中规定的方程和要求，但砌体墙的承重和耗能能力的设计值被高估了。如果使用脆性单元来建造结构墙，则尽管实际结构是根据规范针对地震荷载进行设计的，但实际结构将面临更高水平的地震风险。对于钢筋砌体尤其如此，其中脆性局部破坏阻止了预测力从钢筋传递到砌体单元。为了限制地震区使用大孔容比、薄壳、腹板的空心单元，应找到欧洲规范8中规定的定性术语“足够的鲁棒性”的定义措施。
As the recent experimental investigations indicated, the robustness of masonry units is one among the most decisive parameters which define the behaviour of masonry walls when subjected to seismic loads. If local brittle failure of units occurs, the mechanism of behaviour and known relationships between the strength and ductility properties of masonry walls change. In such a case, the design values of load bearing and energy dissipation capacity of masonry walls are overestimated, although the equations and requirements specified in the codes have been taken into consideration. If brittle units are used for the construction of structural walls, the actual structure will be exposed to an increased level of seismic risk although it has been designed for earthquake loads according to codes. This is especially the case of reinforced masonry, where brittle local failure prevents the transfer of predicted forces from reinforcing steel to masonry units. In order to provide limitations for the use of hollow units with large hole volume ratio and thin shells and webs in seismic areas, a measure to define the qualitative term “sufficient robustness”, specified in Eurocode 8, should be found.