Seismic Behavior of Reinforced Concrete Column-Steel Beam Subassemblies and Frame Systems

Hong

Advances in Civil Engineering

et al. 2019

is study aims to evaluate flexural strength based on the inelastic neutral axis calculated from all stress states of the proposed precast composite columns with hybrid beam-column joints, which facilitate the erection of concrete precast frames in a similar manner to that used for steel frames. It was also shown analytically that hybrid joints with headed studs contribute significantly to the flexural moment capacity and effectively increase the flexural structural performance of precast composite columns. e strain compatibility-based analytical results were compared with test data, showing results with an error of less than 8% at the critical section for the maximum load limit state of specimens. It is observed that the strength contributed by steel sections and headed studs increased by 30% and 35% at the yield limit state and maximum load limit, respectively, reducing the dependence on rebars. e total contribution of the headed studs was as large as 12.2% (average of the two layers of headed studs) at the maximum load limit state, whereas the strength provided by the tensile rebars decreased from 90.5% to 63.9% for the specimen with headed studs at the maximum load limit state.

Section: Research Backgroundmentioning

confidence: 99%

Analytical Investigation of the Flexural Capacity of Precast Concrete Frames with Hybrid Joints

Hong

Advances in Civil Engineering

et al. 2019

“…Because all specimens experienced severe pinching in cyclic behaviors, as shown in Fig. 6, the κ values were significantly less than the κ ¼ 0.5-0.6 of conventional composite connections using steel beams (Xuemei and Gustavo 2004;Cheng and Chen 2005). A notable distinction between the κ values for I550 and I450 with different beam depths was not evident.…”

Section: Local Buckling Of Steel Platesmentioning

confidence: 89%

Cyclic Loading Test for Beam-Column Connections of Concrete-Filled U-Shaped Steel Beams and Concrete-Encased Steel Angle Columns

et al. 2015

Prefabricated steel-reinforced concrete angle columns and concrete-filled U-shaped steel beams were recently developed for efficient steel-concrete composite construction. In the present study, seismic details of TSC beam-PSRC column connections were developed, taking into consideration constructability and cost efficiency. A cyclic loading test was performed on the beam-column connections to investigate load-carrying capacity, deformation capacity, failure mode, and energy dissipation capacity. For the test parameters, the connection type (interior or exterior) and the depth of the TSC beams were considered. The test results showed that the deformation and energy dissipation capacities of the specimens satisfied the requirements for intermediate moment frames specified in the AISC standard. Further, the moment-carrying capacities predicted using plastic stress distribution were found to be in agreement with the test results. The joint shear capacities of the specimens were evaluated according to ASCE design guidelines.

Journal of Korean Society of Steel Construction

“…사용하여 접합부의 파괴를 유도하였다 [9], [10], [13] . 비교적 최 근에 이루어진 실험들은 보다 더 실무적인 목적으로, 강진지 역에서의 안전성을 검증하기 위하여 접합부를 충분히 강하 게 설계하고 보의 항복을 유도하였다 [16], [17], [18], [19], [20] . 한편, 접 합부와 보의 파괴를 동시에 유도한 실험은 제한적이었다 [10] .…”

Section: 접합부 전단강도 저하의 원인unclassified

Seismic Performance of RC Column-Steel Beam Connections for Large Columns

Park¹,

Lee²,

Kim³

et al. 2016

-Earthquake resistance of RC column-steel beam (RCS) joints with simplified details were studied. Simplified details are necessary for large columns to improve the productivity and constructability. To strengthen the beam-column joint, the effects of transverse beams, studs, and U-cross ties were used. Four 2/3 scale interior RCS connections were tested under cyclic lateral loading. The specimens generally exhibited good deformation capacity exceeding 4.0% story drift ratio after yielding of both beam and beam-column joint. Ultimately, the specimens failed by shear mechanism of the joint panel. The test strengths were compared with the predictions of existing design methods.