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Experimental investigation of “dry” jointed precast concrete frame sub-assemblies with steel angle and tube connections
Bulletin of Earthquake Engineering ( IF 4.6 ) Pub Date : 2020-04-06 , DOI: 10.1007/s10518-020-00837-9
P. K. Aninthaneni , R. P. Dhakal , J. Marshall , J. Bothara

Full details of steel angle and tube beam-column connections developed for a “dry” jointed precast concrete frame building whose nonlinear structural performance is aimed to be comparable to that of a cast-in situ/monolithic concrete frame building are reported. Hysteretic behaviour of the frame sub-assemblies with different angle/tube connection configurations is experimentally investigated in this paper whereas the numerical and analytical simulation results are reported in a companion submission. Structural performance of the tested frame sub-assemblies is evaluated by studying the nonlinear cyclic plots and the observed damage states in the connection region. Design parameters influencing the strength and stiffness of the tested frame sub-assemblies are identified by comparing the measured slips and load–displacement envelopes. The moment versus rotation response of the tested connections is classified according to the Eurocode specifications and the beam line method. The erection and dismantling processes of a precast concrete frame with the proposed angle/tube beam-column connection are also explained in brief. Feasibility of replacing a damaged beam with a new beam of the same (or higher) capacity and achieving the same (or better) performance compared to the initially tested frame sub-assembly is also evaluated. Based on the obtained evidences, it can be concluded that a jointed precast concrete frame with the proposed angle/tube beam-column connections can emulate a wet-jointed concrete frame only in certain aspects such as initial lateral stiffness and nominal lateral strength but not the energy dissipation, strength and stiffness degradation, and ductility.

中文翻译:

钢角和管连接的“干式”预制混凝土预制框架子组件的试验研究

报道了为“干式”预制混凝土预制框架开发的钢角和管梁-柱连接的全部细节,其非线性结构性能旨在与现浇/整体混凝土预制框架相当。本文通过实验研究了具有不同角度/管连接配置的框架子组件的滞回性能,而数值和分析模拟结果则在随附的报告中进行了报道。通过研究非线性循环图和在连接区域中观察到的损坏状态,可以评估被测框架部件的结构性能。通过比较测得的滑移和载荷-位移包络线,可以确定影响被测框架部件的强度和刚度的设计参数。根据Eurocode规范和束线法对测试连接的力矩与旋转响应进行了分类。还简要说明了带有建议的角度/管梁柱连接的预制混凝土框架的安装和拆除过程。还评估了与初始测试的框架子组件相比,用相同(或更高)容量的新梁替换损坏的梁并实现相同(或更好)性能的可行性。根据获得的证据,可以得出结论,具有所提出的角/管梁-柱连接的节理预制混凝土框架仅在某些方面(例如初始侧向刚度和标称侧向强度)可以模拟湿节理混凝土框架,但不能在某些方面模拟湿节理混凝土框架。能量耗散,强度和刚度降低以及延展性。
更新日期:2020-04-06
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