Mechanical properties of rail-type anti-tensile rubber bearings
ZHANG Longfei1, TAO Zhong2, PAN Wen1, ZHANG Zhanshu3, LAN Xiang1, ZENG Chuanwang4
1.Faculty of Civil Engineering & Architecture, Kunming University of Science and Technology, Kunming 650500, China;
2.Faculty of Public Security and Emergency Management, Kunming University of Science and Technology, Kunming 650093, China;
3.Kunming NEW ZhengDongYang Architecture Design, Kunming 650000, China;
4.Yunan Quakesafe Seismic Isolation Technologies Co., Ltd, Kunming 650217, China
In view of the shortcomings of traditional isolation rubber bearings in tensile performance, a rail-type anti-tensile device(RTD) was designed to provide rubber bearings with additional tensile stiffness, and a new kind of tensile rubber bearings was proposed which can be used in high-rise buildings with large aspect ratio.By pseudo-static tests, the horizontal compression-shear and vertical tensile behaviors of the natural rubber bearing LNR600 and the rail-type rubber bearing RTD&LNR600 were studied.Based on the ABAQUS analysis platform, the vertical tensile constitutive relation of the RTD and the horizontal mechanical properties of the RTD&LNR600 were studied in the states of compression-shear and tension-shear.The results show that: in compression-shear state, the equivalent horizontal stiffness of RTD&LNR600 is slightly greater than that of LNR600，but not more than 4%.The vertical tensile constitutive relation of RTD&LNR600 is bilinear，and the tensile bearing capacity is greatly improved.The tensile properties of RTD are not affected by the eccentric state.It is shown the mechanical behaviors of RTD can be described by the bilinear model.The horizontal performance of RTD&LNR600 is stable in tension-shear state, and its correlation with tension is not obvious.
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