HIGH-STRENGTH REGENERATIVE MIXED STEEL PIPE CONCRETE AXIAL-COMPRESSION COLUMN WITH INTERNAL LOCAL RESTRAINT, AND CONSTRUCTION PROCESS

摘要

A high-strength regenerative mixed steel pipe concrete axial-compression column with internal local restraint, and a construction process. The axial-compression column comprises a steel pipe (1), high-strength-grade fresh concrete (2), low-strength-grade waste concrete blocks (3), a spiral stirrup (4), and a longitudinal frame vertical rib (6). The spiral stirrup (4) is disposed in the center of the steel pipe (1). The high-strength-grade fresh concrete (2) is poured into the steel pipe (1) and the low-strength-grade waste concrete blocks (3) are fed into the steel pipe (1) in an alternate manner. The compressive strength of the high-strength-grade fresh concrete (2) is 30 to 90 MPa greater than that of the low-strength-grade waste concrete blocks (3). The axial-compression column can expand the application range of the low-strength-grade waste concrete.