A、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>箍筋加密</strong></span>
B、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>纵筋加大</strong></span>
C、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>混凝土强度降低</strong></span>
D、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>截面减小</strong></span>