Simulations of shear behavior in the Steel Beam and Reinforced Concrete column connections

• Main Authors: Hung-hsin Chu, 朱弘新
• Other Authors: Chin-Tung Cheng
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/31982094176030044198

碩士 === 國立高雄第一科技大學 === 營建工程所 === 96 === This investigation aims to propose a new theory, while combined strut and tie model for the concrete, and Fukumoto model for the steel to simulate the shear transfer behavior in the steel beam and reinforced concrete column connections. The analytical procedure divides the connection into inner、outer and steel beam web elements. The shear strength of inner element is resisted by the steel beam web and encased diagonal concrete strut; while the concrete strut and joint hoops outside inner element composed as the outer element. The strength of the joint is superposition of three elements based on their deformation compatibility, stress-strain relation and the force equilibrium. Due to introduction of strain compatibility, stiffness of the joints can also be estimated. In order to validate the proposed theory, shear strength of thirty-one connections are computed and compared with test results from the literature. Besides, design strength calculated from code provisions such as AIJ guideline and Deierlein model as well as shear strength estimated by an existing model proposed by researchers Parra-Montesinos and Wight for each test are all compared at the same time. In addition to the ultimate shear strength, nonlinear force-deformation behavior in joints of several tests can also be simulated based on the proposed theory and research of Parra-Montesinos and Wight. The comparison shows that AIJ model is inappropriate for the evaluation of variable strengthen in the joint region, while Parra-Montesinos and Wight and proposed model can well predict evaluate the ultimate shear strength of joints. Since analytical procedure in detailed model is more complex and difficult for engineer, therefore, it was simplified. The comparison showed that its accuracy is better.