[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$feCxUAC9nRSvyEwBIwfPmUg5giK0EcJ3T9hTV4ktmhCo":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2025-05-07 16:23:13",186131481,[8,9,10,11],"危险截面在最大弯矩所在截面,而截面上的危险点在此截面中性轴上","危险截面在最大剪力所在截面,而截面上的危险点在此截面上下最边沿的点","危险截面仅一个,即最大弯矩所在截面,而截面上的危险点也仅此截面上下最边沿的点","危险截面有二个,分别是最大弯矩和最大剪力所在截面,截面上的危险点分别为最大弯矩截面上下最边沿的点和最大剪力截面中性轴上的点",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},16,"9fa2f423876a8dfe29b7fadc59bed328","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1965153f6f5efd2fba07815761982aeb.jpg","工程力学（本科）","work_43363996","第9章 弯曲应力-01","对塑性材料而言,由于材料的拉伸屈服极限和压缩屈服极限相等,因此对平面弯曲的等截面直梁进行强度校核时,( )",[21,26,35,44,53,62,71,76,85,94],{"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},[],186131482,[30,31,32,33],"工字形&gt;正方形&gt;圆形","正方形&gt;工字形&gt;圆形","圆形&gt;正方形&gt;工字形","工字形&gt;圆形&gt;正方形","工字形、正方形、圆形截面梁的截面面积相同,截面的抗弯能力( )",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":25},[],186131483,[39,40,41,42],"最大拉应力与最大压应力位于同一截面c","最大拉应力位于截面",",最大压应力位于截面dC、 最大拉应力位于截面",",最大压应力位于截面cD、 最大拉应力与最大压应力位于同一截面d","T型截面的梁,z轴通过横截面形心,弯矩图如图示,则有( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F926bf92f733d77a3580e4bcbf223870b.png\">",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":24,"type":25},[],186131484,[48,49,50,51],"梁材料的拉压强度相等","截面形状对称于中性轴","截面形状不对称于中性轴","截面形状对称于纵向对称轴","最大弯矩截面上最大拉应力等于最大压应力的条件是( )",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":24,"type":25},[],186131486,[57,58,59,60],"梁的轴线","截面对称轴","中性轴","纵向对称面","梁发生平面弯曲时,其横截面绕( )转动",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":24,"type":25},[],186131488,[66,67,68,69],"仅有正应力","仅有切应力","既有正应力,又有切应力","切应力很小,忽略不计","纯弯曲梁段,横截面上( )",{"answer":72,"createTime":5,"id":73,"options":74,"question":75,"source":24,"type":25},[],186131490,[66,67,68,69],"横力弯曲梁,横截面上( )",{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":24,"type":25},[],186131491,[80,81,82,83],"1\u002F8","8","2","1\u002F2","圆截面悬臂梁,若其它条件不变,而直径增加一倍,则其最大正应力是原来的( )倍",{"answer":86,"createTime":5,"id":87,"options":88,"question":93,"source":24,"type":25},[],186131492,[89,90,91,92],"对称轴","偏于受拉边的非对称轴","偏于受压边的非对称轴","对称或非对称轴","设计钢梁时,宜采用中性轴为( )的截面",{"answer":95,"createTime":5,"id":96,"options":97,"question":101,"source":24,"type":25},[],186131493,[98,81,99,100],"4","16","32","矩形截面梁,若其截面高度和宽度都增加一倍,则其强度提高到原来的( )倍"]