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Jiang H.-B.,Harbin Institute of Technology | Zhang H.-S.,Harbin Institute of Technology | Zhang H.-S.,Tianjin University | Liu W.-Q.,Heilongjiang YUHUI Construction Group | Yan H.-Y.,Heilongjiang YUHUI Construction Group
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | Year: 2011

In order to study the connection method between reinforced bars of the precast concrete structure, based on research results about reinforcement anchorage experiments, 108 lapping tests were completed. For the area percentage rate of the lap joints at 100%, the reinforcement lapping length was determined. According to the facts of bars diameter, concrete strength and different lapping length, some specimen simple tensile tests were completed. The failure mode and the impact law of factors about the reinforcement lapping were obtained, and the reasonable length was calculated. Through a series of tests and discussions, the plug-in filling hole for lap-joint of steel bar is a reliable connection, simply construct and suitable for precast concrete structure reinforced connection under the housing industrialization.


Jiang H.,Harbin Institute of Technology | Chen Z.,Harbin Institute of Technology | Zhang J.,Harbin Institute of Technology | Wu B.,Harbin Institute of Technology | And 2 more authors.
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2011

In order to study the seismic behavior of precast reinforced concrete shear wall structure, a three-story full-scale model was built in laboratory for an elastic quasi-static test and an elasto-plastic pseudo-dynamic substructure test. This paper introduces the design of the experiment model and the construction process including the key connection technique. Then the quasi-static test of the full-scale model is described. This paper presents the hysteretic curves, stiffness degradation curve and the detailed data of stiffness degradation of the full-scale model under cyclic loading. The initial study on the dynamic characteristics is presented and is the basis of the following pseudo-dynamic substructure test. The stiffness degradation analysis shows that the stiffness degradation is significant before visible micro cracks are developed on the precast reinforced concrete shear wall test model. This indicates that the overall seismic energy dissipation capacity of the structure can be enhanced if the connections between precast members have adequate deformation capacities. This new feature of precast RC shear wall structure still needs further experimental and theoretical studies so that it can be applied in actual seismic design.


Chen Z.,Harbin Institute of Technology | Jiang H.,Harbin Institute of Technology | Zhang J.,Harbin Institute of Technology | Wu B.,Harbin Institute of Technology | And 2 more authors.
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2011

Based on the quasi-static test of the precast reinforced concrete shear wall structure, a systematic pseudo-dynamic substructure test using the equivalent force control method was conducted to study the failure process and deformation capacity of the full-scale model under simulated earthquake action. The test data of the descending segment of the shear-displacement curve was obtained. Then this paper gives the displacement time history curve, hysteretic curve, skeleton curve, stiffness degradation curve and ductility. The test results provide the test data for the elasto-plastic analysis under earthquake action. The test results show that the adopted connection technology is reliable to ensure the connection performance under earthquake action. Moreover, the precast reinforced concrete shear wall structure has good ductility and good seismic performance and can satisfy the design requirements of the Chinese code for seven degree of seismic fortification intensity. It can fulfill is the "three level" seismic fortification objectives. The proposed structure can be used in earthquake zones with reasonable design.


Jiang H.-B.,Harbin Institute of Technology | Zhang H.-S.,Harbin Institute of Technology | Zhang H.-S.,Tianjin University | Liu W.-Q.,Heilongjiang YUHUI Construction Group | Yan H.-Y.,Heilongjiang YUHUI Construction Group
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | Year: 2011

To study the connection method between reinforced bars of the precast concrete (PC) structure, 81 plug-in filling hole for lap-joint of steel bar sample tests were made, and the main factors, such as reinforced bar diameter, concrete strength and anchorage length etc. were considered during the tests. The test results indicated that the ultimate failure state of all the anchoring specimens were the external reinforced bar yielding or broken up by pulling, and the abnormal anchorage was not destroyed. When the basic anchoring length was reduced by 10% or even 20%, specimens still showed enough safety. Based on this, the basic anchoring length of plug-in filling hole for lap-joint of steel bar can be given as 0.8 l a.

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