[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fRGK8Y3RfFVhqibEdjb-odzZg04BbLZG7Rt6ij0fUckE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2023-10-22 21:02:59",101132551,[8,9,10,11],"立方体抗压强度标准值","轴心抗压强度设计值","轴心抗压强度标准值","立方体抗压强度平均值",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},18,"ae30bb1a058e7c07b7f44dc4efc5fe1e","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9e922b4b95ffc4d75400a334342cb3b2.jpg","混凝土结构原理（上）","2432030fe6394c5aac72f37bb662e610","第二章作业题","混凝土强度的基本指标是",[21,26,35,45,54,63,72,81,90,99],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],101132553,[30,31,32,33],"C25表示混凝土的立方体抗压强度标准值是25N\u002Fmm2","C25表示混凝土的棱柱体抗压强度标准值是25N\u002Fmm2","C25表示混凝土的轴心抗压强度标准值是25N\u002Fmm2","混凝土的棱柱体抗压强度比立方体抗压强度高","以下说法正确的是",{"answer":36,"createTime":37,"id":38,"options":39,"question":44,"source":24,"type":25},[],"2023-10-22 21:03:00",101132556,[40,41,42,43],"fcu,k> ft > fc > ft,k","fcu,k> fc > ft,k > ft","fcu,k> fc > ft > ft,k","fc > fcu,k > ft,k > ft","混凝土各种强度指标就其数值从大到小的顺序是",{"answer":46,"createTime":37,"id":47,"options":48,"question":53,"source":24,"type":25},[],101132559,[49,50,51,52],"平均值μ确定","μ-2σ确定","μ-1.645σ确定","μ+1.645σ","混凝土立方体抗压强度的标准值是由立方体抗压实验后的",{"answer":55,"createTime":37,"id":56,"options":57,"question":62,"source":24,"type":25},[],101132562,[58,59,60,61],"(3~3.5)×10-3","(3~3.5)×10-4","(1.5~2.5)×10-3","(1.5~2.5)×10-4","混凝土的极限压应变εcu大致为",{"answer":64,"createTime":37,"id":65,"options":66,"question":71,"source":24,"type":25},[],101132564,[67,68,69,70],"2.0×10-3","2.0×10-4","3.0×10-3","3.0×10-4","混凝土的峰值压变ε0大致为",{"answer":73,"createTime":37,"id":74,"options":75,"question":80,"source":24,"type":25},[],101132567,[76,77,78,79],"所有混凝土的比例极限点强度变化不大,一般在(0.3~0.4)fc","对于高强混凝土,其长期抗压强度可达0.95 fc","混凝土强度等级越高,则σ-ε曲线的下降段陡峭","在一般的试验机上是难以测到混凝土应力-应变全曲线的","关于混凝土应力-应变曲线的描述,不正确的是",{"answer":82,"createTime":37,"id":83,"options":84,"question":89,"source":24,"type":25},[],101132569,[85,86,87,88],"应力-应变曲线原点切线的斜率","应力-应变曲线切线的斜率","应力与塑性应变的比值","应力与总应变的比值","混凝土的变形模量是指",{"answer":91,"createTime":37,"id":92,"options":93,"question":98,"source":24,"type":25},[],101132571,[94,95,96,97],"抗压强度","延性","抗拉强度","抗压强度和延性","混凝土的侧向约束压应力提高了混凝土的",{"answer":100,"createTime":37,"id":101,"options":102,"question":107,"source":24,"type":25},[],101132573,[103,104,105,106],"应力松弛变形","收缩徐变","弹性后效变形","徐变变形","混凝土在长期压力作用下,随时间延续而增长的变形称为"]