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无粘结预应力混凝土楼盖概述

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无粘结预应力混凝土楼盖概述

发布日期:2016-07-27 作者: 点击:

无(wu)(wu)粘(zhan)(zhan)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)预应(ying)(ying)(ying)力(li)(li)(li)(li)(li)(li)混(hun)凝土(tu)在(zai)房(fang)屋建(jian)筑中(zhong)应(ying)(ying)(ying)用(yong)(yong)广泛(fan)的(de)(de)(de)(de)(de)是楼盖(gai)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou),预应(ying)(ying)(ying)力(li)(li)(li)(li)(li)(li)锚具技术也是本世纪70年代无(wu)(wu)粘(zhan)(zhan)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)预应(ying)(ying)(ying)力(li)(li)(li)(li)(li)(li)筋(jin)出现(xian)后.才得以在(zai)房(fang)屋建(jian)筑中(zhong)得到广泛(fan)应(ying)(ying)(ying)用(yong)(yong)。在(zai)楼盖(gai)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou)中(zhong)应(ying)(ying)(ying)用(yong)(yong)无(wu)(wu)粘(zhan)(zhan)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)预应(ying)(ying)(ying)力(li)(li)(li)(li)(li)(li)混(hun)凝土(tu)使得结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou)高(gao)度(du)(du)(du)降低,增(zeng)加了建(jian)筑的(de)(de)(de)(de)(de)空间。在(zai)一般(ban)楼盖(gai)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou)中(zhong),可(ke)分(fen)为(wei)单向(xiang)(xiang)(xiang)(xiang)(xiang)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)与双(shuang)(shuang)向(xiang)(xiang)(xiang)(xiang)(xiang)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)。根(gen)据(ju)(ju)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou)功(gong)能(neng)的(de)(de)(de)(de)(de)不同可(ke)设计(ji)成(cheng):无(wu)(wu)梁无(wu)(wu)柱(zhu)(zhu)(zhu)帽(mao)双(shuang)(shuang)向(xiang)(xiang)(xiang)(xiang)(xiang)甲板(ban)(ban)(ban)(ban)(ban)(ban)(ban)、带(dai)住帽(mao)或(huo)(huo)托板(ban)(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)双(shuang)(shuang)向(xiang)(xiang)(xiang)(xiang)(xiang)平(ping)(ping)(ping)(ping)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)、密(mi)(mi)肋(lei)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)、带(dai)宽(kuan)扁梁的(de)(de)(de)(de)(de)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)以及周边梁支承(cheng)的(de)(de)(de)(de)(de)双(shuang)(shuang)向(xiang)(xiang)(xiang)(xiang)(xiang)平(ping)(ping)(ping)(ping)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)。带(dai)宽(kuan)扁梁的(de)(de)(de)(de)(de)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)由(you)(you)于(yu)具有建(jian)筑的(de)(de)(de)(de)(de)双(shuang)(shuang)向(xiang)(xiang)(xiang)(xiang)(xiang)良好抗震(zhen)性(xing)能(neng),近来得到了广泛(fan)的(de)(de)(de)(de)(de)应(ying)(ying)(ying)用(yong)(yong)。 无(wu)(wu)粘(zhan)(zhan)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)预应(ying)(ying)(ying)力(li)(li)(li)(li)(li)(li)混(hun)凝土(tu)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou)高(gao)度(du)(du)(du)设计(ji)根(gen)据(ju)(ju)国内(nei)外(wai)的(de)(de)(de)(de)(de)经验,对(dui)于(yu)单向(xiang)(xiang)(xiang)(xiang)(xiang)板(ban)(ban)(ban)(ban)(ban)(ban)(ban),其(qi)厚(hou)度(du)(du)(du)宜(yi)取跨度(du)(du)(du)的(de)(de)(de)(de)(de)1/40-1/45;板(ban)(ban)(ban)(ban)(ban)(ban)(ban)柱(zhu)(zhu)(zhu)体系的(de)(de)(de)(de)(de)双(shuang)(shuang)向(xiang)(xiang)(xiang)(xiang)(xiang)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)厚(hou)度(du)(du)(du)宜(yi)取柱(zhu)(zhu)(zhu)网长(zhang)边的(de)(de)(de)(de)(de)1/40- 1/45;对(dui)于(yu)带(dai)平(ping)(ping)(ping)(ping)托板(ban)(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)双(shuang)(shuang)向(xiang)(xiang)(xiang)(xiang)(xiang)平(ping)(ping)(ping)(ping)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)(以柱(zhu)(zhu)(zhu)中(zhong)心向(xiang)(xiang)(xiang)(xiang)(xiang)各向(xiang)(xiang)(xiang)(xiang)(xiang)延伸计(ji),平(ping)(ping)(ping)(ping)托板(ban)(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)延伸长(zhang)度(du)(du)(du)不宜(yi)小(xiao)(xiao)于(yu)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)跨度(du)(du)(du)的(de)(de)(de)(de)(de)1/6,平(ping)(ping)(ping)(ping)托板(ban)(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)厚(hou)度(du)(du)(du)宜(yi)大于(yu)1.5倍板(ban)(ban)(ban)(ban)(ban)(ban)(ban)厚(hou))厚(hou)度(du)(du)(du)宜(yi)取柱(zhu)(zhu)(zhu)网长(zhang)边尺寸(cun)的(de)(de)(de)(de)(de)1/45-1/50;对(dui)于(yu)密(mi)(mi)肋(lei)板(ban)(ban)(ban)(ban)(ban)(ban)(ban),其(qi)肋(lei)高(gao)(包括板(ban)(ban)(ban)(ban)(ban)(ban)(ban)厚(hou))宜(yi)取柱(zhu)(zhu)(zhu)网长(zhang)边尺寸(cun)的(de)(de)(de)(de)(de)1/30-1/35。 无(wu)(wu)粘(zhan)(zhan)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)预应(ying)(ying)(ying)力(li)(li)(li)(li)(li)(li)混(hun)凝土(tu)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)内(nei)力(li)(li)(li)(li)(li)(li)分(fen)析(xi)根(gen)据(ju)(ju)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou)特征,可(ke)采用(yong)(yong)弹性(xing)或(huo)(huo)弹塑性(xing)方(fang)法(fa)(fa)分(fen)析(xi),其(qi)受(shou)力(li)(li)(li)(li)(li)(li)计(ji)算主(zhu)要分(fen)为(wei)单向(xiang)(xiang)(xiang)(xiang)(xiang)体系与双(shuang)(shuang)向(xiang)(xiang)(xiang)(xiang)(xiang)体系。垂直荷(he)(he)载(zai)(zai)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)下(xia)的(de)(de)(de)(de)(de)矩(ju)形(xing)柱(zhu)(zhu)(zhu)网无(wu)(wu)粘(zhan)(zhan)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)预应(ying)(ying)(ying)力(li)(li)(li)(li)(li)(li)混(hun)凝土(tu)平(ping)(ping)(ping)(ping)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)、密(mi)(mi)肋(lei)板(ban)(ban)(ban)(ban)(ban)(ban)(ban),可(ke)按等(deng)(deng)代框(kuang)(kuang)架(jia)法(fa)(fa)进行(xing)内(nei)力(li)(li)(li)(li)(li)(li)计(ji)算。 等(deng)(deng)代框(kuang)(kuang)架(jia)法(fa)(fa)是将三(san)(san)维结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou)简化(hua)为(wei)两个通过柱(zhu)(zhu)(zhu)轴线的(de)(de)(de)(de)(de)正(zheng)交(jiao)等(deng)(deng)代框(kuang)(kuang)架(jia),如(ru)图4-22所(suo)示。在(zai)无(wu)(wu)侧(ce)(ce)力(li)(li)(li)(li)(li)(li)构(gou)(gou)(gou)(gou)(gou)(gou)件(jian)(jian)支撑(cheng)时(shi)(shi),应(ying)(ying)(ying)考虑侧(ce)(ce)向(xiang)(xiang)(xiang)(xiang)(xiang)水(shui)(shui)(shui)平(ping)(ping)(ping)(ping)荷(he)(he)载(zai)(zai)的(de)(de)(de)(de)(de)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong),水(shui)(shui)(shui)平(ping)(ping)(ping)(ping)荷(he)(he)载(zai)(zai)产生的(de)(de)(de)(de)(de)内(nei)力(li)(li)(li)(li)(li)(li)应(ying)(ying)(ying)组合在(zai)等(deng)(deng)代框(kuang)(kuang)架(jia)的(de)(de)(de)(de)(de)平(ping)(ping)(ping)(ping)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)中(zhong)。 在(zai)设置(zhi)有剪力(li)(li)(li)(li)(li)(li)墙或(huo)(huo)简体等(deng)(deng)抗侧(ce)(ce)力(li)(li)(li)(li)(li)(li)构(gou)(gou)(gou)(gou)(gou)(gou)件(jian)(jian)的(de)(de)(de)(de)(de)高(gao)层(ceng)锚具结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou)中(zhong),水(shui)(shui)(shui)平(ping)(ping)(ping)(ping)荷(he)(he)载(zai)(zai)主(zhu)要由(you)(you)抗侧(ce)(ce)力(li)(li)(li)(li)(li)(li)构(gou)(gou)(gou)(gou)(gou)(gou)件(jian)(jian)承(cheng)受(shou),楼板(ban)(ban)(ban)(ban)(ban)(ban)(ban)主(zhu)要承(cheng)受(shou)竖向(xiang)(xiang)(xiang)(xiang)(xiang)荷(he)(he)载(zai)(zai)的(de)(de)(de)(de)(de)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)。此时(shi)(shi),矩(ju)形(xing)往网的(de)(de)(de)(de)(de)无(wu)(wu)枯结(jie)(jie)(jie)(jie)(jie)(jie)(jie)预应(ying)(ying)(ying)力(li)(li)(li)(li)(li)(li)棍凝土(tu)平(ping)(ping)(ping)(ping)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)、密(mi)(mi)肋(lei)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)等(deng)(deng)代框(kuang)(kuang)架(jia)梁的(de)(de)(de)(de)(de)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)宽(kuan)可(ke)取柱(zhu)(zhu)(zhu)两侧(ce)(ce)半跨之和(he)。 ACI规范的(de)(de)(de)(de)(de)分(fen)析(xi)方(fang)法(fa)(fa)将等(deng)(deng)代框(kuang)(kuang)架(jia)分(fen)解为(wei)三(san)(san)个部(bu)分(fen):1)水(shui)(shui)(shui)平(ping)(ping)(ping)(ping)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)带(dai);2)柱(zhu)(zhu)(zhu)子(zi)或(huo)(huo)其(qi)他(ta)支撑(cheng)结(jie)(jie)(jie)(jie)(jie)(jie)(jie)构(gou)(gou)(gou)(gou)(gou)(gou);3)在(zai)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)带(dai)的(de)(de)(de)(de)(de)柱(zhu)(zhu)(zhu)间起弯矩(ju)传递作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)的(de)(de)(de)(de)(de)柱(zhu)(zhu)(zhu)两侧(ce)(ce)的(de)(de)(de)(de)(de)受(shou)扭板(ban)(ban)(ban)(ban)(ban)(ban)(ban)带(dai)。水(shui)(shui)(shui)平(ping)(ping)(ping)(ping)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)带(dai)与垂直构(gou)(gou)(gou)(gou)(gou)(gou)件(jian)(jian)间的(de)(de)(de)(de)(de)弯矩(ju)传递与它们(men)之间的(de)(de)(de)(de)(de)连接情况和(he)相(xiang)对(dui)刚度(du)(du)(du)有关。在(zai)三(san)(san)向(xiang)(xiang)(xiang)(xiang)(xiang)体系中(zhong),柱(zhu)(zhu)(zhu)子(zi)所(suo)承(cheng)受(shou)的(de)(de)(de)(de)(de)弯矩(ju)比由(you)(you)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)柱(zhu)(zhu)(zhu)框(kuang)(kuang)架(jia)计(ji)算模型求(qiu)得的(de)(de)(de)(de)(de)值要小(xiao)(xiao),须考虑柱(zhu)(zhu)(zhu)子(zi)的(de)(de)(de)(de)(de)转(zhuan)动能(neng)力(li)(li)(li)(li)(li)(li),可(ke)采用(yong)(yong)增(zeng)加有效长(zhang)度(du)(du)(du)的(de)(de)(de)(de)(de)等(deng)(deng)效柱(zhu)(zhu)(zhu)代替.以减小(xiao)(xiao)柱(zhu)(zhu)(zhu)的(de)(de)(de)(de)(de)弯矩(ju)值

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