ABSTRACT

In light of the forthcoming second generation Eurocodes (EC), the results of conducted systematic in-plane cyclic and compressive tests on three-leaf stone masonry walls are discussed following new requirements and provisions. The new proposal for EC8-3 for existing buildings is based on partial factors safety approach, though it considers different uncertainties in defining input parameters for effective seismic performance-based assessment. Prior to its application, massive calibration effort will be needed since there is no standardized method for shear testing of masonry walls. In this paper, the performance limit states damage, resistance, and displacement capacities from conducted test results were evaluated and assessed through comparison with analytical solutions and imposed limit values, as stated in existing codes. The test results provide a much higher deformation capacity than the limits provided in both existing and new proposal of EC8-3 as well as those in the ASCE code provisions. The reason for this lies in the soft, “ductile” mortar for which the presumed resistance according to code provisions should be significantly higher when considering good quality ashlar three-leaf stone masonry.

摘要

根据即将出台的第二代欧洲规范 (EC)，根据新的要求和规定，讨论了对三叶石砌体墙进行的系统平面内循环和压缩测试的结果。针对现有建筑物的 EC8-3 新提案基于部分因素安全方法，尽管它在定义有效的基于地震性能的评估的输入参数时考虑了不同的不确定性。在应用之前，由于没有标准化的砌体墙剪切测试方法，因此需要进行大量校准工作。在本文中，通过与现有规范中规定的分析解决方案和强制限制值的比较，评估和评估了所进行测试结果的性能极限状态损坏、阻力和位移能力。测试结果提供的变形能力远高于 EC8-3 现有和新提案以及 ASCE 规范条款中规定的限制。其原因在于柔软的“延展性”砂浆，在考虑优质方石三叶石砌体时，根据规范规定的推定阻力应该明显更高。