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In this paper, based on force-displacement characteristics obtained by test-ing in elastomeric pad bearings(rubber bearing and teflon plate-coated sliding bearing) and curved steel-strip, analytical models of elastomeric pad bearings and curved steel-strip are presented and confirmed by comparing results of theoretical computation with that of shaking table tests for a simple bridge model. A comprehensive study shows that a system of teflon plate-coated sliding bearings incorporating curved steel-strip... In this paper, based on force-displacement characteristics obtained by test-ing in elastomeric pad bearings(rubber bearing and teflon plate-coated sliding bearing) and curved steel-strip, analytical models of elastomeric pad bearings and curved steel-strip are presented and confirmed by comparing results of theoretical computation with that of shaking table tests for a simple bridge model. A comprehensive study shows that a system of teflon plate-coated sliding bearings incorporating curved steel-strip energy absorber is suitable for the seismic isolation and energy absorption for bridges. 本文在桥梁板式橡胶支座、聚四氟乙稀滑板橡胶支座的动力剪切性能以及弧形钢板条的滞回性能试验的基础上,建立了相应的力学分析模式。通过简支梁桥模型的地震模拟振动台试验和计算分析,验证了计算模式的正确性,并表明弧形钢板条耗能器与滑板橡胶支座组合是一简易而理想的减震、耗能体系。 A tall pier model was designed, and its shaking table test was done with input motion of the artificial acceleration records at bridge site and El- Centro records (1940, N - S and E - W). The earthquake resistance behavior of the tall pier model was studied. The displacement response at the top of the pier model was analysed, and comparison between the test data and theoretical analysis results of the model shows that they are conformable to each other. 设计了一个高墩模型,采用桥址人工波和El—Centro波进行了模拟地震振动台试验,研究了高墩的抗震性能和抗震能力.分析了离墩的墩顶位移反应,并与理论分析结果进行了比较,结果表明两者吻合得较好. In order to clarify the deformation and failure mechanism of retaining structure ground under liquefying, a series of shaking table tests was performed. The test results suggest that the strength decrease and local liquefaction of subsoil are the leading factors in the deformation and failure of retaining structures. The movement of the ground mainly manifests the lateral displacement under liquefaction. At the backfill layer, liquefaction will be rapidly reached in far field whereas the excess pore... In order to clarify the deformation and failure mechanism of retaining structure ground under liquefying, a series of shaking table tests was performed. The test results suggest that the strength decrease and local liquefaction of subsoil are the leading factors in the deformation and failure of retaining structures. The movement of the ground mainly manifests the lateral displacement under liquefaction. At the backfill layer, liquefaction will be rapidly reached in far field whereas the excess pore pressure is slowly increased nearby the wall under shaking. INTRODUCTIONOneofthemostimportanttopicsinearthquakegeotech-nicalengineeringistheaseismaticdesignofearth-retainingstructures(H... |
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