板 Ⅰ名词1.(片状硬物体) board; plank; plate 石板 a flat piece of stone; 天花板 ceiling; 黑板 blackboard; 地板 floor board; 切菜板 chopping block; 混凝土板 concrete slab2.(专指店铺的门板) shutter 上板儿 put up the shutters3.[音乐] (打拍子的乐器) clappers 檀板 hardwood clappers4.(音乐和戏曲中的节拍) an accented beat in music and traditional opera 有板有眼 have both accented beats and unaccented beats in a bar; rhythmical; measured; orderlyⅡ形容词1.(少变化, 不灵活) stiff; unnatural 老古板 stiffly traditional; 他们都那样活泼, 显得我太板了。 i looked a bit stiff while they were so lively.2.(硬似板子的) hard 地太板了, 不好锄。 the ground is too hard to hoe.Ⅲ动词(表情严肃) look serious; pull tight 板着脸 keep a straight face; pull a long faceⅣ量词a card of; a paper of 一板钮扣 a card of buttons; 一板发夹 a paper of hairpinsⅤ(构词成分)见 “老板”
双 Ⅰ形容词1.(两个) two; twin; both; dual 双发动机飞机 twin-engined plane; 双向交通 two-way traffic; 成对成双 in pairs2.(偶数的) even 双号座位 even-numbered seats; 双数 even numbers3.(加倍的) double; twofold 双份 double the amount; twice as muchⅡ量词(用于成对的东西) pair 一双筷子 a pair of chopsticks; 一双鞋 a pair of shoesⅢ名词(姓氏) a surname 双福 shuang fu
In this thesis , four types of steel beam - rectangular cfst column connections , including normal welded flange plate ( wfp ) connection , bolted flange plate ( bfp ) connection , stiffened end plate ( sep ) connection and double split - tee plate ( dst ) connection , were designed based on the configuration of steel frame connection . total 8 models , 2 models of each kind of connections were tested under low - reversed cyclic loading at the end of cfst columns . the relationships between force and displacement at the end of columns , the relationships between the moment and rotation of the joints , degradations of strength and stiffness , ductility , failure mechanism and failure characteristics of these four connections under different axial - compression ratios were presented 本文借鉴钢框架节点构造,设计了四种类型矩形钢管混凝土柱与钢梁连接节点,包括常规栓焊( wfp )节点、翼缘全螺栓连接( bfp )节点、双t板连接( dst )节点以及加劲端板连接( sep )节点,进行了四类节点8个模型试件在柱端低周反复荷载作用下的抗震性能试验研究,比较了不同轴压比下节点的滞回性能、强度与刚度退化、延性、破坏机理与破坏特征,主要结论有: 1 、节点的位移滞回曲线与转角滞回曲线为块型分布,没有或略有捏拢现象,耗能能力强; 2 、轴压比对节点滞回曲线有显著影响,全部节点都有显著的刚度退化; 3 、位移与转角骨架曲线在峰值荷载后有较长的水平或下降段,具有良好的延性性能; 4 、从整体抗震性能上看,翼缘全螺栓连接节点、双t板连接与加劲端板连接节点都优于常规栓焊节点,可在实际工程中加以推广。