Seismic steel tubular column with internal local restraint and filled with high-strength compound concrete containing normal-strength demolished concrete lumps and construction process of such column
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United States of America Patent
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Oct 2, 2018
Grant Date -
Sep 7, 2017
app pub date -
Oct 24, 2014
filing date -
Sep 17, 2014
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Abstract
A seismic steel tubular column with internal local restraint and filled with high-strength compound concrete containing normal-strength demolished concrete lumps, and a construction process. The seismic column includes a steel tube (1), high-strength fresh concrete (2), normal-strength demolished concrete lumps (3), horizontal stirrups (4), and longitudinal erection bars (5). The horizontal stirrups (4) are arranged at upper and lower ends inside the steel tube (1). The high-strength fresh concrete (2) is poured and the normal-strength demolished concrete lumps (3) are put alternately inside the steel tube (1). A compressive strength of the high-strength fresh concrete (2) is 30˜90 MPa greater than that of the normal-strength demolished concrete lumps (3).
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