Study of Punching Shear Behavior under Elevated Temperatures Loaded on the Tension Side

• Main Authors: Bai, Jing-Sheng, 白景升
• Other Authors: Cheng, Fu-Ping
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/25948186496902499983

碩士 === 國立交通大學 === 土木工程學系 === 98 === This research was conducted to investigate the punching shear behavior of concrete slab-column joints with different steel ratio, concrete strength and fire duration under maximum service load at elevated temperatures. The distribution of temperature inside the slab and the deflection of slab were measured in the progress tests. Then we can find the behavior of concrete slab-column joints at elevated temperatures. From the test results, increasing steel ratio can increase the punching shear strength at room temperature. The strength of specimen with high steel ratio decreases faster than the one with low steel ratio at elevated temperature. The residual strength of the fire duration for two hours is higher than the fire duration for three hours. The fire resistance capacity of punching shear wish is subjected elevated temperatures on tension side is higher than there specimens subjected elevated temperatures on the compression side. NO spalling were fund in the tests.