Improving Bond Preformance of Interior RC Beam-Column Joints with Mechanical Anchorage

• Main Authors: Jyun-Yao Kang, 康俊堯
• Other Authors: Hung-Jen Lee
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/07808236507267590931

碩士 === 國立雲林科技大學 === 營建工程系碩士班 === 95 === The main purpose of thesis is to study the six full-scale reinforced concrete interior beam-column connections with a concentric or eccentric beam framing into a rectangular column in strong or weak direction is reported. Each cross-shaped subassembly had a concentric or eccentric beam framing into an identical rectangular column in strong or weak direction. Member proportions, design and details were compatible with the modern seismic design provisions for the special moment-resisting frames to ensure anticipated beam plastic mechanisms. The specimen variables are the ratio of column depth to bar diameter and mechanical anchorage. Experimental results show that two joints of beam framing in strong direction, where the column depth-to-bar diameter ratio is 31, exhibited bond failure at a drift level of 4%. Another two joints connecting a beam in weak direction, where the column depth-to-bar diameter ratio is 21, exhibited bond failure at a drift level of 3%. Last two specimens with mechanical anchorage device on each beam bar, enhanced the seismic performance by avoiding bond failure. The objective of analysis specimen of this study refer to New Zealand concrete design standard and Softened Strut-and-Tie Model，New Zealand concrete design standard show that corresponsively deep to column and corresponsively shallow to beam,（NS series）the principle shear stress difference is not remarkable in joints, but slightly underestimated the Vch. Softened Strut-and-Tie Model could rational predictions on the shear force transmitted mechanical of joints。