ABSTRACT

In this paper, the seismic behaviour and the strut retrofitting of the Mozaffarieh Timche in the historical covered Tabriz Bazaar is investigated. The Bazaar was added to the UNESCO World Heritage List in August 2010. Historical buildings are particularly vulnerable to seismic events because they were designed solely for gravitational loads without any consideration of seismic parameters. The study was carried out in three main steps, the first of which consisted of compression and three-point bending tests on the construction materials to determine their mechanical properties. Thereafter, a three-dimensional finite element model of the Mozaffarieh Timche was developed. Finally, numerical modelling and dynamic analyses were performed. The results revealed that neither the orthogonal walls nor the vaults have adequate resistance to lateral loads. Consequently, they need to be retrofitted in a suitable manner. To avoid collapse or wide crack patterns, two types of strengthening methods are proposed. Steel ties should be applied for reinforcing and for connecting walls to each other, and a spatial structure needs to be placed on the roof in order to control the large displacement of the vaults. The strengthened model showed an acceptable performance with regard to major earthquake excitation, with minimum change to the historic architectural view of the structure.

摘要

在本文中，研究了历史悠久的大不里士集市中 Mozaffarieh Timche 的地震行为和支柱改造。集市于 2010 年 8 月被列入联合国教科文组织世界遗产名录。历史建筑特别容易受到地震事件的影响，因为它们专为重力载荷而设计，没有考虑地震参数。该研究分三个主要步骤进行，第一个步骤包括对建筑材料进行压缩和三点弯曲试验，以确定其机械性能。此后，开发了 Mozaffarieh Timche 的三维有限元模型。最后，进行了数值建模和动力分析。结果表明，正交墙和拱顶都没有足够的抗侧向载荷能力。因此，它们需要以合适的方式进行改造。为避免倒塌或宽裂缝模式，提出了两种类型的加固方法。应采用钢拉杆加固和连接墙体，并需要在屋顶上放置空间结构，以控制拱顶的大位移。加强模型在大地震激发方面表现出可接受的性能，对结构的历史建筑视图的改变最小。并且需要在屋顶上放置空间结构，以控制拱顶的大位移。加强模型在大地震激发方面表现出可接受的性能，对结构的历史建筑视图的改变最小。并且需要在屋顶上放置空间结构，以控制拱顶的大位移。加强模型在大地震激发方面表现出可接受的性能，对结构的历史建筑视图的改变最小。