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首页> 外文会议>Conference on Performance-Based Seismic Design of Concrete Buildings: State of the Practice >Seismic Performance of Full-Scale Reinforced Concrete Beam-Column Connections Extracted From Earthquake-Damaged Buildings
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Seismic Performance of Full-Scale Reinforced Concrete Beam-Column Connections Extracted From Earthquake-Damaged Buildings

机译：地震损坏建筑物中提取的全尺寸钢筋混凝土梁柱连接的地震性能

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摘要

This paper presents the structural testing of four full-scale reinforced concrete beam-column connections, extracted from reinforced concrete buildings that suffered minor damage from the Canterbury Earthquakes in New Zealand. Two connections are extracted from a moment frame comprising the secondary seismic-resisting system of a concrete building; two are extracted from moment frames of the primary seismic-resisting systems of a precast concrete building. The seismic performance of the connections is evaluated from the test results and compared to recommendations in ASCE 41 (2013) for the evaluation of existing buildings. Due to the size of the specimens, the tests were stopped when the actuator reached its maximum stroke, at interstory drifts between 2.5% and 3. The cast in-place connections showed moderate damage after the tests, at ductility levels above 2.9, and their initial lateral stiffness was approximately 80% of the lateral stiffness of numerical models representing the undamaged state. The precast connections exhibited extensive damage along the construction joint between the precast beams and the cast-in-place beam-column joint, at ductility levels above 3.4. The plastic mechanism was governed by sliding shear of the precast beams, which caused severe stiffness deterioration at the end of the tests. The measured stiffness in this case was approximately half of the stiffness predicted by numerical models in which nonlinearity is considered in the form of flexural plastic hinges only. This unexpected behavior is attributed to the low quantity of reinforcing steel crossing the construction joint, and presumably earthquake damage.
机译：本文介绍了四个全尺寸钢筋混凝土梁柱连接的结构检测，从钢筋混凝土建筑中提取，遭受新西兰坎特伯雷地震的轻微损坏的浓度。从包括混凝土建筑的二次抗震系统的力矩框架提取两个连接;从预制混凝土建筑的主要地震抗动系统的时刻框架中提取两个。从测试结果评估连接的地震性能，与ASCE 41（2013）中的建议进行比较，以评估现有建筑物。由于样本的尺寸，当致动器达到其最大行程时，停止测试，在2.5％和3之间的型倒置时浇铸的就地连接在测试后显示出中度损伤，延性水平高于2.9及其初始横向刚度约为未损坏状态的数值模型的横向刚度的约80％。预制连接沿着预制梁和浇注梁柱接头之间的施工接头在3.4以上的延展性水平之间表现出广泛的损坏。塑料机构通过预制光束滑动剪切来控制，这在测试结束时引起严重的刚度劣化。在这种情况下所测得的硬度约为一半通过在非线性仅在弯曲塑性铰形式考虑数值模型所预测的刚度。这种意外的行为归因于交叉施工接头的低量加固钢，并且可能是地震损伤。

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