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塔里木大学砌体结构课程设计11基本资料某五层混合结构办公楼,其平面、剖面如图所示。图中梁L-1截面为cmmmmhbcc550200,梁端伸入墙内240mm,一层纵墙厚为370mm,2-5层纵墙厚240mm,横墙厚均为240mm,墙体拟采用双面粉刷并采用MU10实心烧结粘土砖,1层、2层采用M10混合砂浆砌筑;3-5层采用M7.5混合砂浆砌筑,试验算承重墙的承载力。层高3.3m,基础采用砖基础,埋深1.2m。女儿墙高度600mm,施工质量控制等级为B级。办公楼平面图办公楼剖面图塔里木大学砌体结构课程设计22荷载计算①屋面荷载:屋面恒载标准值为2/005.4mkN,屋面活载标准值为22/kNm,组合值系数7.0cψ。②楼面荷载:楼面恒载标准值为2/105.3mkN,楼面活载标准值为22.2/kNm,组合值系数7.0cψ。③墙体及门窗荷载:240mm厚墙体自重为24.56/KNm,370mm厚墙体自重为27.03/KNm,钢框玻璃窗自重标准值为:2/45.0mkN。④L-1梁自重(含双面抹灰):2250.20.55(0.5520.2)3.08/kNm3确定静力方案采用装配式钢筋混凝土屋盖。最大恒墙间距mms328.10,该房屋属刚性房屋,外墙不考虑风载的影响。4两底砌体的局部受压承载力验算(1)一层验算:(a)有效支撑长度010/10550/1.89170240cahfmm,局部受压面积2017020034000lAabmm,影响砌体局部抗压强度的计算面积20(2)(2002240)240163200Abhhmm,因01632004.3334000lAA,故0。2qlNl,1.23.1053.61.42.20.7/qkNm,45lNkN。故局部压力设计值=45lNkN。(b)砌体局部受压承载力设计值Mpaf89.1,砌体局部抗压强度提高系数10.354.811.682.0,砌体局部抗压承载力为0.71.681.893400075.57llfAN。故砌体局部承载力满足要求。(2)二层验算:(a)有效支撑长度mmfhac2404.18069.1/55010/100,局部受压面积塔里木大学砌体结构课程设计320180.420036080lAabmm,影响砌体局部抗压强度的计算面积20163200240)2402200()2(mmhhbA,因35.4360801632000lAA,故0。45lNkN。故局部压力设计值=45lNkN。(b)砌体局部受压承载力设计值Mpaf69.1,砌体局部抗压强度提高系数10.35163200/3608011.652.01.65取,砌体局部抗压承载力为0.71.651.693608070.43llfAN。故砌体局部承载力满足要求。5高厚比验算(1)一层纵墙高厚比验算a、整片墙高厚比:恒墙间距10.8224.59smHmm,01.04.5HHm,sbs4.0127.08.0360018004.01,0.11。MU10实心烧结粘土砖,M10混合砂浆砌筑26][,2000.050.0570.253600cbl,0450012.16370Hh12[]1.00.82620.8满足要求。(2)二层纵墙高厚比验算a、整片墙高厚比:恒墙间距10.8224.59smHmm,01.04.5HHm,sbs4.0127.08.0360018004.01,0.11。MU10实心烧结粘土砖,M7.5混合砂浆砌筑26][,25.0067.0360024005.0lbc,0450018.75240Hh12[]1.00.82620.8满足要求。(3)三至五层纵墙高厚比验算a、整片墙高厚比:恒墙间距10.8223.36.6smHmm,01.03.3HHm,sbs4.0127.08.0360018004.01,0.11。。MU10实心烧结粘土砖,M7.5混合砂浆砌筑26][,2000.050.0560.253600cbl,0450018.75240Hh12[]1.00.82620.8满足要求。塔里木大学砌体结构课程设计4(4)横墙高厚比验算a、静力方案的确定:纵墙间距ms8.5m32,该房屋属刚性房屋。b、一层横墙高厚比验算:5.15.8210.2HmsmHm00.40.20.45.80.25.13.34HsHm,20.8,0.11。0334013.92240Hh][218.20268.00.1满足要求。c、二、三、四、五层横墙高厚比验算mHmsmH6.628.53.3,mHsH98.23.32.08.54.02.04.00,0.12,0.11。0298012.42240Hh][2126满足要求。6纵墙内力计算及截面承载力验算(1)计算单元的确定:如办公楼图所示。(2)控制截面:底层和二-五层墙厚,砂浆等级不同,需验算底层及二层,三层墙体承载力,顶层承载力。每层墙取墙顶大梁底部,墙底下层大梁底部。两个控制截面。三-五层砌体抗压强度设计值Mpaf69.1,一二层Mpaf89.1。每层墙的计算截面面积2511066.61800370mmA,254321032.41800240mmAAA。(3)各层墙体内力标准值计算a、计算各层墙自重标准值:女儿墙及顶层梁高范围墙重,女儿墙900mm,梁高550mm,屋面板,楼面板120mm。(0.90.120.55)36004.5625.77kGkN。二-五层墙自重2345(3.63.31.81.8)4.561.81.80.4540.86kkkkGGGGkN底层墙重1(3.63.851.81.8)7.031.81.80.4576.01kGkNb、计算屋面,楼面,梁支座反力标准值屋面梁恒载标准值传来的支座反力5(4.0053.63.08)5.80.550.74lgkNkN屋面梁由活荷载标准值传来支座反力为523.65.80.520.88lqkNkN一~四层楼面梁由恒载标准值传来支座反力塔里木大学砌体结构课程设计51234(3.1053.63.08)5.80.541.35lgklgklgklgkNNNNkN一~四层楼面梁由活载标准值传来支座反力12342.23.65.80.522.97lqklqklqklqkNNNNkN三~五层梁有效支撑长度mmfhaaac2404.18069.15501010050403二层楼面梁有效支撑长度mmfhac2406.17089.1550101002一层楼面梁有效支撑长度mmfhac2406.17089.1550101001(4)内力组合1)五层墙截面a、由可变荷载效应控制组合5551.2()1.41.2(25.7750.74)1.420.88121.04klgklqkNGNNkN5551.21.41.250.741.420.8890.12llgklqkNNNkNmmael84.474.1804.01204.02240055555590.1247.8435.62121.04llNeemmNb、由恒载效应控制组合5551.35()1.40.71.35(25.7750.74)1.40.720.88123.75klgklqkNGNNkN5551.351.40.71.3550.741.40.720.8888.96llgklqkNNNkNmmael84.474.1804.01204.02240055555588.9647.8434.39123.75llNeemmN2)五层墙截面A由可变荷载效应控制组合5551.21.240.86121.04155.47kNGNkNb、由恒载效应控制组合5551.351.3540.86123.75178.9kNGNkN塔里木大学砌体结构课程设计63)四层墙截面a、由可变荷载效应控制组合4554541.2()1.4()1.2(25.7740.8650.7441.35)kklgklgklqklqkNGGNNNN1.4(20.8822.97)251.85kN4441.21.41.241.351.422.9781.78llgklqkNNNkNmmael84.474.1804.01204.02240044444481.7847.8415.53251.85llNeemmNb、由恒载效应控制组合4554541.35()1.40.7()1.35(25.7740.8650.7441.35)kklgklgklqklqkNGGNNNN1.40.7(20.8822.97)256.98kN4441.351.40.71.3541.351.40.722.9778.33llgklqkNNNkNmmael84.474.1804.01204.02240044444478.3347.8414.58256.98llNeemmN4)四层墙截面a、由可变荷载效应控制组合4441.21.240.86251.85300.88kNGNkNb、由恒载效应控制组合4441.351.3540.86256.98312.14kNGNkN5)三层墙截面a、由可变荷载效应控制组合)(4.1)(2.1345345453qklqklqklgklgklgklkkkNNNNNNGGGN1.2(25.7740.8640.8650.7441.3541.35)1.4(20.8822.9722.97)382.66kN3331.21.41.241.351.422.9781.78llgklqkNNNkNmmael84.474.1804.01204.02240033333381.7847.8410.22382.66llNeemmNb、由恒载效应控制组合塔里木大学砌体结构课程设计7)(7.04.1)(35.1345345453qklqklqklgklgklgklkkkNNNNNNGGGN1.35(25.7740.8640.8650.7441.3541.35)1.40.7(20.8822.9722.97)390.74kN3331.351.40.71.3541.351.40.722.9778.33llgklqkNNNkNmmael84.474.1804.01204.02240033333378.3347.849.59390.74llNeemmN6)三层墙截面a、由可变荷载效应控制组合3331.21.240.86380.66431.69kNGNkNb、由恒载效应控制组合3331.351.3540.86390.74445.90kNGNkN7)二层墙截面a、由可变荷载效应控制组合)(4.1)(2.1234523453452qklqklqklqklgklgklgklgklkkkkN
本文标题:砌体结构课程设计
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