Issue 47

A. Namdar et alii, Frattura ed Integrità Strutturale, 47 (2019) 451-458; DOI: 10.3221/IGF-ESIS.47.35 452 In the construction industry and related field, several characteristics of different structure, structural elements, substructure and construction materials are numerically, theoretically and experimentally reported in the literature [1-19], but little research has been done on timber structure design. A timber structure state of art has numerically been investigated, to understand seismic resistance by the evaluation of the load, displacement and stress have been applied on the timber structures [1]. An investigation has been made comparing the behavior of laterally loaded round and squared timber bolted joints [2]. A research work on damage of bamboo and wooden materials based on linear elastic fracture mechanics has been reported [3]. The collapse prediction and non-linear behavior of the T-joint have experimentally and numerically been investigated [4]. The measurement of the compression strength of wood was studied [5]. But seismic design of timber frame subjected to near-fault ground motions, developing cycling graph using ABAQUS, and an explanation of the seismic behavior of timber beams have never been reported in the literature. In this paper, the beam is placed in a single span of a timber frame, with two different length sizes of 1.8 and 3.3 meter. The timber frame is subjected to near- fault ground motions. The seismic load-displacement, seismic load-strain and strain-displacement curves have been investigated, to understand the inertial interaction, energy dissipation and nonlinear deformation of beams in timber frames, with reference to the small displacement theory. M ATERIALS AND MODELING he failure mitigation of soil foundation and soil-footing interaction have been investigated, considering analytical and numerical analysis. 2D numerical analysis has been performed for soil-concrete foundation interaction by using ABAQUS software [20-21]. In the present study, 3D numerical analysis has been used to understand timber frame seismic response, during timber frame subjected to near-fault ground motion, also by using ABAQUS software. Fig. 1, shows Wentong pagoda timber tower with nine floors, the tower consists of small span timber frame. It is important to seismic analysis of timber frame, while many heritage and modern structure made up from timber. From other hand high flexibility of timber frame compare to steel and concrete frame, seismic resistance of timber frame shows more stability. Figure 1 : Wentong pagoda timber tower with nine floors is one heritage and beautiful monuments constructed in Huai’an city, Jiangsu province of China Two timber frame models have been developed and analyzed, at each model the timber frame built up with single span. The size of spans in the first and second models are respectively 1.8 and 3.3 meter. In all models, the foundations of frame have been installed with suitable boundary condition. For each individual node, at the base of foundation, the fixed boundary condition has been simulated. It is hope this kind of boundary condition improves quality of analysis. The timber structure has been modeled with deformable mesh and has been numerically analyzed by using ABAQUS software. On the timber T