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某医院地下车库柱开裂损伤原因与预防
发布时间:2020-01-13

  摘    要: 为探析地下室结构框架柱产生水平通缝的原因,结合实际工程案例确定了其重要影响因素,包括温度收缩应力、顶板局部堆载。以实际地下室结构为分析原型,在结合设计资料、施工背景和现场检测结果的基础上,按实际施工过程对结构受力进行有限元分析模拟,分析了框架柱承载能力及其内力变形情况。通过对比实际裂缝分布状态、裂缝形式与模型计算分析结果,验证其分析成因的正确性。并针对其具体损伤成因,提出了相应的预防解决措施。

  关键词: 地下车库; 框架柱; 局部堆载; 温度效应; 水平裂缝;

  0、 引言

  在实践过程中,因地下结构设计缺陷和施工技术质量问题以及地面建筑规划、景观规划不合理等原因,地下结构在建造或使用过程中会发生损伤破坏,造成顶板挠曲变形、产生裂缝,甚至坍塌,事故一旦发生,其后果极其严重。本文针对某医院地下车库柱开裂损伤情况,从多方面分析其柱损伤的成因,希望为类似工程实际问题提供参考和预防措施。
 

某医院地下车库柱开裂损伤原因与预防
 

  1、 工程背景

  MOUYIYUANGUANGCHANGDIXIACHEKUWEIYICENGKUANGJIAJIEGOU,QIPINGMIANBUZHITURUTU1SUOSHI(BUFEN)。GAIDIXIACHEKUCENGGAO4.2m,DINGBANHOUDUWEI220mm,ZHULIANGJIEMIANCHICUNWEI300mm×1000mm,CILIANGJIEMIANCHICUNWEI250mm×350mm。LIANGBANHUNNINGTUQIANGDUDENGJIJUNWEIC30;ZHUJIEMIANCHICUNWEI400×400mm,ZHUDEHUNNINGTUQIANGDUDENGJIWEIC30。QISHANGBUWEIYIYUANXIUXIANGUANGCHANG,JIANZHUZHANGDUWEI72.8m,KUANDUWEI45.74m,JIANZHUMIANJIWEI3329.87m[2]。GAIGONGCHENGYU2017NIAN4YUEKAISHIDIXIASHISHIGONG,2017NIAN7YUEWANCHENGJIAOZHUHOUJIAODAI。YOUYUQITAYUANYINGONGCHENGGEZHISHUYUE,WEIJISHIFUTUYEWEIDUIDINGBANCAIQUQITABAOWENCUOSHI,SHIQIDIXIASHIDINGBANBAOLUSHUYUE。ZAICIQIJIANYONGYUJINGGUANSHIGONGDETIANTUYIJIZHONGDUIFANGYUDIXIASHIDINGBANDONGBEICE,DUIFANGTUZUIGAOWEI3mZUOYOU。DUIFANGHOUBUJIU,FAXIANDIXIASHIQUYUDALIANGZHUFASHENGSHUIPINGKAILIEXIANXIANG,LIJICAIQUJUBUJIANGZAICUOSHI。

  图1 地下车库结构部分平面布置
图1 地下车库结构部分平面布置

  2、 现场检测情况

  WAIGUANZHILIANGJIANCHA:DIXIASHIDINGBANCHUDUOSHULIANGZHUJIEDIANHEXINQU(LIANGDIXIAYUE20cmFANWEI)KUANGJIAZHUCUNZAIGUANTONGSHUIPINGLIEFENG,LIEFENGZUIDAKUANDUWEI5mmRUTU2(a)SUOSHI,ZUIXIAOKUANDUWEI1mmRUTU2(b)SUOSHI,SHAOBUFENKUANGJIAZHUCUNZAIFEIGUANTONGLIEFENGRUTU2(c)SUOSHI;BUFENZHUGENSHANGFANG20cmFANWEINEICUNZAIGUANTONGSHUIPINGLIEFENGRUTU2(d)SUOSHI;KUANGJIAZHULIEFENGCHUHUNNINGTUCUNZAIQISHAXIANXIANG。

  图2 框架柱裂缝形式
图2 框架柱裂缝形式

  YIJU《HUIDANFAJIANCEHUNNINGTUKANGYAQIANGDUJISHUGUICHENG》(JGJ/T 23—2011),XIANCHANGDUIGAIGONGCHENGDIXIAYICENGKUANGJIAZHUJINXINGJIANCE,JINGJIANCE,ZHUDEHUNNINGTUQIANGDUDENGJIJUNMANZUC30YAOQIU。CAIYONGZBL-R630XINGHUNNINGTUGANGJINJIANCEYIDUIBENGONGCHENGSHOUJIANQUKUANGJIAZHUZHUZONGJINSHULIANG、GUJINJIANJUJIHUNNINGTUBAOHUCENGHOUDUQINGKUANGJINXINGLEJIANCE。KUANGJIAZHUGANGJINSHULIANGJIGUJINJIANJUJUNFUHESHEJIYAOQIU,HUNNINGTUBAOHUCENGHOUDUYEMANZUGUIDINGDEHEGEYAOQIU。

  3、 开裂受损原因分析

  3.1、 地下车库承载力验算

  GENJUYUANSHIGONGTUHEXIANCHANGJIANCEJIEGUO,CAIYONGBEIJINGYINGJIANKERUANJIANYOUXIANZERENGONGSIBIANZHIDEYJK-A(1.9.0BAN)RUANJIANJINXINGCHENGZAILIJISUAN。BENGONGCHENGXIANCHANGJIANCESHI,DIXIASHIDINGBANYIYOUZHISHAO1mGAODEFUTUYONGYULVHUA,QIEZAISHIJISHIGONGGUOCHENGZHONGDONGBEICEHAIYOU3.0mZUOYOUGAODEDUITU。ZONGSHANG,DIXIASHIDINGBANJISUANHEZAIQUZHIRUXIA:FUTUHENGHEZAI:20kN/m[2]×1m=20kN/m[2],JUBU3mGAODUITUHENGHEZAIQU54kN/m[2],SHIGONGHEZAIQU4kN/m[3]。LIYONGYJKJIANDINGJIAGUMOKUAIGONGNENG,JIANGYUANSHISHIPEIZHUGANGJINBIAOLURUZHI“ZHUSHIGONGTU”CAIDANZHONG。QIJIANDINGJISUANJIEGUOBIAOMING:ZAISHIGONGJIEDUAN,11GENKUANGJIAZHU(JIZHONGZAIDUIZAIFUJINDEZHU)SHIPEIGANGJINXIAOYUJISUANGANGJIN,CHENGZAILIBUMANZUYAOQIU。SHIJIDUIZAICHUZHOUWEISHOUSUNZHUSHULIANGWEI8GEN,JISUANJIEGUOYUSHIJIZHUPOHUAIWEIZHIJIBENWENHE,SHUOMINGJUBUDUIZAISHIYINQIZHUPOHUAIDEZHUYAOYINSU。WEIJINYIBUTANXIZHUSUNSHANGDEYUANYIN,BENWENJIANGMONISHIJISHIGONGGUOCHENGFENBIEKAOLVWENDUXIAOYINGJIJUBUDUIZAIDEZUOYONG,JINXINGZHULIEFENGCHENGYINFENXI。

  3.2、 温度效应的影响

  DIXIACHEKUCONGJIAODAIJIAOZHUWANCHENGDAOKUANGJIAZHUCHUXIANLIEFENG,QIJIANWENDUXIAJIANGYUE22℃。WENDUJIANGDIYINQIHUNNINGTUSHOUSUO。GAIGONGCHENGDINGBANNANBEILIANGCEYUZHUYUANLOUDINGBANXIANGLIAN,DONGCEYUDANGTUQIANGXIANGLIAN,XICESHEYOUSHENSUOFENG。YOUYUDIXIASHIDANGTUQIANGJUYOUJIAODADECEXIANGGANGDU,SHUYULIANXUSHIYUESHU,GUCHEKUDINGBANDONGCEKESHEWEIQIANGUZHUANG。DANGDINGBANCHENGSHOUJUNYUNWENDUCHAT(JIANGWENWEIFU)SHI,DINGBANBIANYUANJIANGXIANGZHONGJIANCHANSHENGSHOUSUO。BENWENYUNYONGYJKRUANJIAN,DUIWENDUHEZAIYINQIDEGOUJIANBIANXING、GOUJIANJUNYUNSHENGWENHUOJIANGWENJINXINGMONI,FENXIWENDUXIAOYINGDUIZHUDEYINGXIANG。TONGGUOFENXI,KUANGJIAZHUDEWEIYIRUTU3SUOSHI。YOUTU3KEZHI,ZAIWENDUHEZAIZUOYONGXIA,BIANZHUDEWEIYILIANGYAODAYUZHONGJIANZHUDEWEIYILIANG。YOUYUXICESHEYOUSHENSUOFENG,WEIYUSHENSUOFENGFUJINDEGOUJIANSHOUWENDUYINGXIANGKEYANZHANGFANGXIANGFASHENGSHUIPINGSHENSUO,QIBIANXINGTUHEWANJUTURUTU4SUOSHI。YOUTU4KEZHI,WENDUSUOYINQIDESHOUSUOYINGLISHIJIEGOUCHANSHENGNEILIZHONGFENBU,QIEQIKUANGJIAZHUDEZUIDAWANJUZHIWEIYUZHUSHANGDUAN,GUSHENSUOFENGCHUDEZHUSHOUWENDUYINGXIANGZHUDUANGENGYIFASHENGPOHUAI,DANGKUANGJIAZHUDUANBUHUNNINGTUBIANYUANLAYINGLIDAYUHUNNINGTUJIXIANKANGLAQIANGDUSHIJIUHUICHANSHENGLIEFENG。YISHENSUOFENGYOUCETIXIWEILI,KAOJINSHENSUOFENGXIADUANDEBIANZHU,SHOUDONGBEIFANGXIANGDEWEIYIYINGXIANG,xFANGXIANGYUyFANGXIANGWANJUJIEJIN,ZELIEFENGSHOUXIANHUIZAIJUXINGJIEMIANYIJIAOCHUCHUXIANLIEFENG,KUANGJIAZHUDELIEFENGCHANSHENGGUOCHENGRUTU5SUOSHI,ZHEIYUXIANCHANGSUOGUANCHADAODELIEFENGKAIZHANWEIZHIYIZHI。

  图3 地下室框架柱位移
图3 地下室框架柱位移

  图4 伸缩缝位置处柱的变形和弯矩
图4 伸缩缝位置处柱的变形和弯矩

  图5 最大弯矩截面处应力
图5 最大弯矩截面处应力

  3.3、 局部堆载的影响

赢发彩票代理   JUBUDUIZAIBUJINJINZENGJIALEDUIZAICHUDENEILIZHI,HAIYINGXIANGQIXIANGLINYIKUAZHUDEWANJUZHI,SHIQIDUIZAIZHOUWEIJIEGOUNEILIZHONGFENBU。WEILEJINYIBUSHUOMINGJUBUDUIZAIDUIZHUDEYINGXIANG,BENWENCAIYONGLIANGZHONGGONGKUANGDUIBIFENXIJUBUDUIZAIDUIZHUDEFUJIAZUOYONGXIAOYING。

  GONGKUANGYIWEIDIXIASHIDINGBANJUNYUNFUTU,GONGKUANGERWEIDIXIASHIDINGBANANSHIJIDUITUFANWEI(1-12~1-16ZHOUJIAOV~bZHOU)。YOUYUZHUDUANyFANGXIANGWANJUZHIJIAOXIAO,GUJINKAOLVZHUDUANxFANGXIANGDEWANJUZHI(BIAO1)。BIAO1ZHONGJUBUDUIZAISUOYINQIDEZHUDUANWANJUFUJIAZHIWEIGONGKUANGERYUGONGKUANGYIDECHAZHI。CONGBIAO1KEYIKANCHU,SUIZHEHEZAIZENGDAZHUDUANWANJUZHIDOUYOUZENGDAQUSHI,QIEJUBUDUIZAIDUIBIANZHUDEFUJIAWANJUZHIZUIDA,BIANZHUPOHUAIKENENGXINGZUIDA。WEIYUUZHOUXIANSHANGDEKUANGJIAZHUFUJIAWANJUZHIJUNDAYUWZHOUSHANGKUANGJIAZHUDEFUJIAWANJUZHI,BIAOMINGJUBUDUIZAIDUIDUIZAIZHOUWEIZHUDEWANJUZHIYINGXIANGYAODAYUDUIZAICHUZHENGXIAFANGDEZHU。ANSHIJIPEIJINYANSUAN,DUIZAIXIAFANGYOU11GENZHUBUMANZUCHENGZAILIYAOQIU,JINGUANDUIZAIZHOUWEIKUANGJIAZHUDEZHENGJIEMIANCHENGZAILIMANZUYAOQIU,DANJIAODADEJUBUDUIZAIRENGDUICIWEIZHICHUDEZHUDUANWANJUZHIYOUJIAODADEYINGXIANG,SHIZHIYOUDAOPOHUAIDEKENENGXINGZENGDA,ZHEIYUXIANCHANGZHUPOHUAIWEIZHIJIBENWENHE。ZONGSHANGSUOSHU,GONGCHENGSHIGONGQIJIANYINGJINLIANGBIMIANLINSHICHAOXIANHEZAIDEDUIFANG,RUBIXULINSHICHAOXIANDUIZAI,ZEYINGJINKENENGZUOYONGYUZHENGKUABANSHANG,BUYIBUZHIBANKUADUIZAI,BIMIANKUODASHOUSUNFANWEI。

  表1 柱端x方向弯矩值(kN/m)
表1 柱端x方向弯矩值(kN/m)

  4、 结论

赢发彩票代理   (1)TONGGUOYOUXIANYUANRUANJIANFENXILEJUBUDUIZAIDUIDIXIACHEKUKUANGJIAZHUDEYINGXIANG,JISUANJIEGUOBIAOMINGJUBUDUIZAISHIYINQIKUANGJIAZHUCHANSHENGLIEFENGDEZHUYAOYUANYIN。JUBUDUIZAICHAOXIANSHISHIGONGFANGCHANGCHANGHUIFANDECUOWU,DANJUBUDUIFANGDEWEIZHIHECHAOZAILIANGJIANGZHIJIEYINGXIANGDAOJIEGOUDEZUIBULISHOULIQINGKUANG。SHIGONGDANWEIYINGYANGEANZHAOYAOQIUDUIFANGHEZAI,BIMIANCHAOXIANDUIZAIDUIJIEGOUCHANSHENGYINGXIANG。

赢发彩票代理   (2)WENDUSHOUSUODUIKUANGJIAZHULIEFENGDECHANSHENGYOUBUKEHULVEDEYINGXIANG。GONGCHENGSHIJIANBIAOMING,LIUFENGYUFOUBUSHIJUEDINGJIEGOUBIANXINGKAILIEDEWEIYITIAOJIAN,SHEZHISHENSUOFENGHEHOUJIAODAIBUYIDINGNENGWANQUANBAOZHENGJIEGOUBUKAILIE。SHEJISHIBUYINGZHIKAOLVSHEJIGUIFANDENEIRONG,YILIUFENGJIUBULIEDESHEJIYUANZE,HAIYINGGAIDUISHIGONGXIANCHANGRONGYIFASHENGDEWENTIJINXINGCHONGFENDEKAOLV,FENXIJIEGOUSHOULIQINGKUANG。DANGJIEGOUSHOUWENDUSHOUSUOYINGXIANGJIAODASHI,YINGDUISHENSUOFENGWEIZHICHUDEKUANGJIAZHUZHEZHONGSHEJI,HELIZENGDAZHUPEIJIN。

赢发彩票代理   (3)CIWAI,BENGONGCHENGKUANGJIAZHUCHUXIANDALIANGGUANTONGLIEFENGHAIYULIANGZHUJIEDIANHEXINQUSHIGONGZHILIANGYOUGUAN,LIEFENGSIZHOUHUNNINGTUYOUFUJIANGJIAZHA,CUNZAIQISHAXIANXIANG。SHIGONGFENGJINGCHANGLIUSHEZAIZHUDESHANGDUANHUOXIABU,TADECUNZAIYINGXIANGJIEDIANHUNNINGTUQIANGDU。SHIGONGFENGCHUYINGYANGEANZHAOSHIGONGGUIFANYAOQIUQINGLIGANJING,ZAOTISONGSANSHIZIHEBORUOCENG,CHONGFENSHIRUN,RANHOUXIANSHUAYIDAO1:0.5DESUSHUINIJIANG,ZAISA25~30mmHOUDE1:2SHUINISHAJIANGYILICHONGFENJIEHE,ZUIHOUJIAOZHUHUNNINGTUBINGRENZHENDAOSHI。

  参考文献

  [1]姜伟,袁勇,柳献.地下结构中混凝土结构边界约束效应分析[J].结构工程师,2011,27(1):61-65.
  [2]汤小平.超长混凝土地下室裂缝控制研究[D].南京:东南大学,2017.
  [3]王铁梦.工程结构裂缝控制[M].北京:中国建筑工业出版社,2017.

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