DETAILED NUMERICAL ANALYSIS OF A HISTORIC BUILDING BASED ON ITS CURRENT CONDITION CAPTURED BY LASER SCANS AND MATERAIL TESTS

Abstract eng:
The technology of high-definition laser scanning is an essential tool for accurate non-destructive three-dimensional measurements of structures. The object’s geometry is captured as a collection of points which is called a “point cloud”. The research team used this technology and conducted an extensive laser scanning program of many historic monuments in Uzbekistan. The program started in 2013 from scanning the famous Registan ensemble in Samarkand. Later in 2015, it was expanded to more cities and monuments and the laser scanning was conducted in Tashkent, Bukhara, Samarkand and Shakhrisyabz. The scanned monuments are from the Timurid Dynasty era and they are on the UNESCO World Heritage List. This paper summarizes some results of this extensive ongoing program. As a representative example, the research results based on data obtained in Shakhrisabz (Uzbekistan) are discussed in details. The city is located in southern Uzbekistan approximately 80 km south of Samarkand, Uzbekistan. Once a major city of Central Asia, it is primarily known today as the birthplace of 14th century Turco-Mongol conqueror Timur. The Kok Gumbaz (Blue Dome) Mosque was built in 1437 and underwent several restorations and reinforcement efforts. A detailed finite element model of the monument was generated from the as-found geometry captured by laser scans. To monitor the buildings’ possible settlement due to poor soil conditions, special high-resolution laser targets were permanently installed. The physical properties of the monuments were investigated by material tests of the major components recovered from the historic sites. The calibrated models were used for comprehensive seismic analysis

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