accleration response spectrum-10S.rar_Spectrum_somewheremxe_反应谱

clear all clc data=dir('*.txt') N=length(data); for(k=1:N) filename = data(k).name;% an acceleration time history % the following block of code reads the specified file and integrates it to % determine the velocity time history file_in = fopen(filename, 'r'); % [record_dt ans] = fscanf(file_in, '%f', 1); % ans = fgetl(file_in); [record, np] = fscanf(file_in, '%f'); fclose(file_in); %%%%% id = findstr('.',filename); sname=[filename(1:id(1)-4)]; % id1 = findstr(' ',filename); % site=[filename(id1(2)+1:id1(2)+2)]; %%%%% % Dt=record(1); % Accelerate=record(2:end); Dt=0.005; %%%可以修改Dt的值 Accelerate=record; count=length(Accelerate); time=0:Dt:(count-1)*Dt; %单位 s % ***********精确法计算各反应*********** %初始化各储存向量 Displace=zeros(1,count); %相对位移 Velocity=zeros(1,count); %相对速度 AbsAcce=zeros(1,count); %绝对加速度 % ***********A,B矩阵*********** DampA=[0.05]; %三个阻尼比 % TA=[0.01 0.02 0.03 0.05 0.075 0.1 0.15 0.2 0.25 0.3 0.4 0.5 0.75 1 1.5 2 3 4 5 6 7.5 10]; %TA=0.000001:0.02:6; %结构周期 TA=[3.0]; % 只计算一个周期点 %记录计算得到的反应，MDis为某阻尼时最大相对位移，MVel为某阻尼 %时最大相对速度，MAcc某阻尼时最大绝对加速度，用于画图 MDis=zeros(3,length(TA)); MVel=zeros(3,length(TA)); MAcc=zeros(3,length(TA)); % figure j=1; %在下一个循环中控制不同的阻尼比 for Damp=[0.05] t=1; %在下一个循环中控制不同的结构自振周期 for T=TA Frcy=2*pi/T ; %结构自振频率 DamFrcy=Frcy*sqrt(1-Damp*Damp); %计算公式化简 e_t=exp(-Damp*Frcy*Dt); s=sin(DamFrcy*Dt); c=cos(DamFrcy*Dt); A=zeros(2,2); A(1,1)=e_t*(s*Damp/sqrt(1-Damp*Damp)+c); A(1,2)=e_t*s/DamFrcy; A(2,1)=-Frcy*e_t*s/sqrt(1-Damp*Damp); A(2,2)=e_t*(-s*Damp/sqrt(1-Damp*Damp)+c); d_f=(2*Damp^2-1)/(Frcy^2*Dt); %计算公式化简 d_3t=Damp/(Frcy^3*Dt); B=zeros(2,2); B(1,1)=e_t*((d_f+Damp/Frcy)*s/DamFrcy+(2*d_3t+1/Frcy^2)*c)-2*d_3t; B(1,2)=-e_t*(d_f*s/DamFrcy+2*d_3t*c)-1/Frcy^2+2*d_3t; B(2,1)=e_t*((d_f+Damp/Frcy)*(c-Damp/sqrt(1-Damp^2)*s)-(2*d_3t+1/Frcy^2)*(DamFrcy*s+Damp*Frcy*c))+1/(Frcy^2*Dt); B(2,2)=e_t*(1/(Frcy^2*Dt)*c+s*Damp/(Frcy*DamFrcy*Dt))-1/(Frcy^2*Dt); for i=1:(count-1) %根据地震记录,计算不同的反应 Displace(i+1)=A(1,1)*Displace(i)+A(1,2)*Velocity(i)+B(1,1)*Accelerate(i)+B(1,2)*Accelerate(i+1); Velocity(i+1)=A(2,1)*Displace(i)+A(2,2)*Velocity(i)+B(2,1)*Accelerate(i)+B(2,2)*Accelerate(i+1); AbsAcce(i+1)=-2*Damp*Frcy*Velocity(i+1)-Frcy^2*Displace(i+1); end MDis(j,t)=max(abs(Displace)); MVel(j,t)=max(abs(Velocity)); if T==0.0 MAcc(j,t)=max(abs(Accelerate)); else MAcc(j,t)=max(abs(AbsAcce)); end if mod(k,2) xa=AbsAcce; xv=Velocity; xd=Displace; else ya=AbsAcce; yv=Velocity; yd=Displace; figure plot(xa,ya,'k-','linewidth',2) hold on xlabel('PSA x direction (cm/s^2)','FontSize',14,'FontWeight','Demi'); ylabel('PSA y direction (cm/s^2)','FontSize',14,'FontWeight','Demi'); set(gca,'fontsize',12,'fontweight','demi'); set(gca,'linewidth',2); set(gca,'ticklength',[0.02;0.05]); axis([-100 100 -100 100]) set(gca,'xtick',[-80:20:80]); set(gca,'ytick',[-80:20:80]); set(gca,'xticklabel',[-80:20:80]); set(gca,'yticklabel',[-80:20:80]); % axis([-50 50 -50 50]) for angle=1:180 rt=xa*cos(angle/180*pi)+ya*sin(angle/180*pi); rth(angle)=max(abs(rt)); rx(angle)=rth(angle)*cos(angle/180*pi); ry(angle)=rth(angle)*sin(angle/180*pi); rx1(angle)=rth(angle)*cos(angle/180*pi+pi); ry1(angle)=rth(angle)*sin(angle/180*pi+pi); end plot(rx,ry,'k-','linewidth',3) plot(rx1,ry1,'k--','linewidth',3) RotD_all(:,k/2)=rth'; RotD100(k/2,1)=max(rth); RotD00(k/2,1)=min(rth); RotD50(k/2,1)=median(rth); id=find(rth==max(rth)); Rot_angle(k/2,1)=id; x1=[-max(rth)*cos(id/180*pi) max(rth)*cos(id/180*pi)]; y1=[-max(rth)*sin(id/180*pi) max(rth)*sin(id/180*pi)]; plot(x1,y1,'r-','linewidth',2.5) if ~exist('SA30') mkdir('SA30') end paths=[pwd,'\SA30\']; % cd返回当前目录(pwd) saveas(gcf,[paths,sname,'_ra.jpg']); saveas(gcf,[paths,sname,'_ra.fig']); close figure plot(xv,yv,'k-','linewidth',2) xlabel('Response velocity x direction (cm/s)','FontSize',14,'FontWeight','Demi'); ylabel('Response velocity y direction (cm/s)','FontSize',14,'FontWeight','Demi'); set(gca,'fontsize',12,'fontweight','demi'); set(gca,'linewidth',2); set(gca,'ticklength',[0.02;0.05]); axis([-100 100 -100 100]) set(gca,'xtick',[-100:20:100]); set(gca,'ytick',[-100:20:100]); set(gca,'xticklabel',[-100:20:100]); set(gca,'yticklabel',[-100:20:100]); saveas(gcf,[paths,sname,'_rv.jpg']); saveas(gcf,[paths,sname,'_rv.fig']); close end % Displace=zeros(1,count);%初始化各储存向量，避免下次不同周期计算时引用到前一个周期的结果 % Velocity=zeros(1,count); % AbsAcce=zeros(1,count); % t=t+1; end end % fid=fopen([paths,strcat(sname,'.txt')],'w'); % fprintf(fid,'%5.2f %5.2f %5.2f \n',MAcc); % fclose(fid); % % ra5(k,1)=MAcc(1,8);%T=0.2周期谱加速度值 % ra5(k,2)=MAcc(1,12);%T=0.5周期谱加速度值 % ra5(k,3)=MAcc(1,14);%T=1.0周期谱加速度值 % ra5(k,4)=MAcc(1,17);%T=3.0周期谱加速度值 str{k}=sname; end; % close all % save Resp_acc.txt ra5 -ascii fid = fopen('Name.dat', 'wt'); for i=1:N/2 fprintf(fid, '%s\n', str{i*2}); end