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首页> 外文会议>RILEM TC 177-MDT Workshop on On-Site Control and Non-Destructive Evaluation of Masonry Structures; Nov 12-14, 2001; Mantova, Italy >JOINTS - PROBLEMS RELATED TO BAD WORKMANSHIP OR TO THE INAPPROPRIATE CONSTRUCTION TECHNIQUES IN MASONRY
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JOINTS - PROBLEMS RELATED TO BAD WORKMANSHIP OR TO THE INAPPROPRIATE CONSTRUCTION TECHNIQUES IN MASONRY

机译：接头-与砌体工作不良或不适当的建筑技术有关的问题

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摘要

There are two aspects of the joints that we are relating to in this article. The first one, which can be assign to the bad workmanship, is the experimentally supported evaluation of the influence of the large proportion of the overgrained sand particles on the mechanical properties of the traditional brick masonry. The tests of the masonry which were carried out through compressive test of masonry specimens of the size of the wallette as well as through bond tests showed the significant influence of sand gradation both on the compressive strength of the masonry and on the bond strength of the brick-mortar junction. The second aspect, which according to some codes can be attributed either to the bad workmanship or to the inappropriate construction technique, is execution of the head joints in contemporary block masonry and its possible impact on the overall resistance of the masonry due to the earthquake load. Although the problems related to the execution of the head joints and its influence on the shear strength of the masonry is partly incorporated in the new EC 6 (EUROCODE 6, 1997), there is still lack of knowledge of the overall resistance of masonry under the earthquake loading. According to the EC 8 (EUROCODE 8, 1994) except in zones of low seismicity (a_g≤0.05 g.) perpend (head) joints should be fully filled with mortar. This clause, as well as some recent research results on that topic, can limit the applicability of many modern types of newly developed clay blocks in earthquake prone areas.
机译：本文涉及的关节有两个方面。第一个可以归因于做工不良，是实验支持的评估了大比例沙粒对传统砖石砌体机械性能的影响。通过对钱包大小的砌体样本进行压缩测试以及通过粘结测试进行的砌体测试表明，砂砾级分对砌体的抗压强度和对砖的粘结强度均具有重大影响-砂浆路口。第二方面，根据某些规范，可能是由于做工差或施工技术不当造成的，而第二方面是当代砌块砌体中的头部接头的执行，以及由于地震荷载而可能对砌体的整体抗力产生影响。尽管新的EC 6（EUROCODE 6，1997）中部分地包含了与执行头部连接及其对砌体抗剪强度的影响有关的问题，但仍缺乏有关砌体在抗压下的整体抗力的知识。地震荷载。根据EC 8（EUROCODE 8，1994年），除了在低地震活动区域（a_g≤0.05g。）以外，悬垂（头部）接缝应完全用砂浆填充。该条款以及有关该主题的一些最新研究成果可能会限制许多现代类型的新开发的粘土块在地震多发地区的适用性。

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