Cyclic Behavior of Reinforced Concrete Beam-Column Knee Connections.
Abstract eng: Over the last few decades, few studies have been conducted on the seismic behaviour of reinforced concrete beam-column knee joints, which are normally at the roof level of a moment-resisting frame building. In practice, design and detailing recommendations on inter-storey beam-column joints are generally adopted for knee joints albeit the differences in their seismic performance, as only few special design provisions are presented for knee joints in most of the design codes in the world. To investigate the seismic performance of beam-column knee joints, large-scale reinforced concrete beam-column knee joints, which were fabricated to simulate those in as-built RC frame buildings designed to ACI 318-14 and ACI-ASCE 352R-02, were tested under reversed cyclic loading. Particular emphasis is given to the effects of horizontal and vertical reinforcement on the shear strength and ductility capacity of the joints. It is shown from the experiments that reinforcement placed in the core of beam-column joints can effectively confine the joint core and improve the seismic performance, and also prevent effectively spalling of the concrete. Test results are compared with those predicted by four seismic design codes, including ACI 318-14, EC8, NZS3101 and GB50010. In general, these design codes of practice do not accurately predict the shear strength of seismically designed knee joints.
Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
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Record created 2017-01-18, last modified 2017-01-18
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