main_a20ttt.m

钢、混凝土结构时频反应谱程序

%该程序为主程序
clear;%清除工作空间变量；
clc;format compact;format long g;
%per=[0:0.2:1.0 1.5:0.5:2 3:1:6];%设定自振周期范围,分别采用不同的密度；
per=0:0.2:6;
sp=length(per);
%采用不同的屈服强度系数；
ebx(1)=0.167;
ebx(2)=0.2;
ebx(3)=0.25;
ebx(4)=0.333;
ebx(5)=0.5;
for iy=1:5
    eb=ebx(iy);
	%=加载地震波=-------------------------------------------------------------------
	%next one 192
	fida(1)=fopen('e:/berkleywave/northridgenew/nor_php270_a.txt','r+');
	fidv(1)=fopen('e:/berkleywave/northridgenew/nor_php270_v.txt','r+');
	%next one 219
	fida(2)=fopen('e:/berkleywave/northridgenew/nor_sar000_a.txt','r+');
	fidv(2)=fopen('e:/berkleywave/northridgenew/nor_sar000_v.txt','r+');
	%next one 220
	fida(3)=fopen('e:/berkleywave/northridgenew/nor_sar270_a.txt','r+');
	fidv(3)=fopen('e:/berkleywave/northridgenew/nor_sar270_v.txt','r+');
	%next one 227
	fida(4)=fopen('e:/berkleywave/northridgenew/nor_scs052_a.txt','r+');
	fidv(4)=fopen('e:/berkleywave/northridgenew/nor_scs052_v.txt','r+');
	%=加载地震波=-------------------------------------------------------------------
	um=zeros(1,sp);
	rm=zeros(1,sp);
	nw=4;
    ztd=0;zacv=0;
	for i=1:nw
        tag=0.;tvg=0.;ag=0.;vg=0.;
		for di=1:5   
            aline=fgetl(fida(i));
            vline=fgetl(fidv(i));
            if(di==4)       
                dt=fscanf(fida(i),'%f',[1 inf]); 
            end   
		end
		ag=fscanf(fida(i),'%f',[1 inf])*9.81; 
		vg=fscanf(fidv(i),'%f',[1 inf])/100; 
		status=fclose(fida(i));status=fclose(fidv(i));
		st=length(ag);%
		at=dt*(st-1); %总时间为at；
		t=0:dt:at;
		cmag=max(abs(ag));
		%ag=ag*2.2/cmag;%%%为和肖结果比较，特添加；
		ag=ag*0.4*9.81/cmag;;%%%和CHAI比较，假定为0.4g，调整mvg；
		vg=vg*0.4*9.81/cmag;
		mag=max(abs(ag));mvg=max(abs(vg));
		acv=mag/9.81/mvg;
        zacv=zacv+acv;
		tc=2*pi*2.0/2.5*mvg/mag;%计算场地特征周期Tc；cv=2.0;ca=2.5;
		%%%&***&***能量分析应采用相同震级地面运动加速度进行标准化；
		%%%计算强震时间td;td=t0.95-t0.05;
		ia=zeros(1,st);
		for m=2:st
            ia(m)=ia(m-1)+pi/2/9.81*(ag(m-1)^2+ag(m)^2)*dt/2;
		end
		iac1=0.1;
		iac2=0.1;
		for n=1:st
            ia1=abs(ia(n)/ia(st)-0.05);
            ia2=abs(ia(n)/ia(st)-0.95);
            if(ia1<iac1)
                iac1=ia1;
                t1=(n-1)*dt;
            end
            if(ia2<iac2)
                iac2=ia2;
                t2=(n-1)*dt;
            end
		end
		td=t2-t1;
        ztd=ztd+td;
		%%%做线弹性计算；
		para1=1;
		[rd1,ad1,rv1,av1,ra1,aa1]=response_l(para1,per,ag,dt,at);
		% figure(1)
		% mesh(per,t,ad1) %绘制出绝对位移时频反应谱图；
		% grid on
		% xlabel('周期 / 秒');
		% ylabel('时间 / 秒');
		[row,rank]=size(aa1);
		sa=zeros(1,rank);
		for ri=1:rank
            for rj=1:row
                if (abs(aa1(rj,ri))>sa(ri))
                    sa(ri)=aa1(rj,ri);%弹性加速度反应谱sa（最大绝对加速度反应）；
                end
            end
		end
		%%%做弹塑性计算；
		para1=1;
		[u1,nrd1,nad1,nrv1,nav1,nra1,naa1,rep]=response_n(para1,sa,per,ag,dt,at,eb);
		% figure(2)
		% mesh(per,t,nad1) %绘制出弹塑性位移时频反应谱；
		% grid on
		% xlabel('周期 / 秒');
		% ylabel('时间 / 秒');
		um1=zeros(1,sp);
		for np=1:sp
            for nt=1:st
                if (abs(u1(nt,np))>um1(np))
                    um1(np)=abs(u1(nt,np));
                end
            end
		end		
		um=um+um1;
		rm=rm+rep;
	end	
	um=um/nw;
	rm=rm/nw;
    ptd=ztd/nw;pacv=zacv/nw;
    %%%输出td和a/v数据到硬盘；
    save('e:\jiji_steel\a20\ttpingjinzhi.txt','ptd','pacv','-ASCII')
    if(iy==1)
		figure(11)
		plot(per(2:sp),um(2:sp),'kd-.') %绘制出弹塑性位移延性反应谱；
		grid on
		xlabel('周期T(s)');
		ylabel('位移延性系数u');
		title('弹塑性位移延性反应谱');
        hold on;
		figure(12)
        %%%输出数据到硬盘；
        save('e:\jiji_steel\a20\ttem_a20_1.txt','rm','-ASCII')
		plot(per,rm,'kd-.') %绘制出累积滞回耗能谱；
		grid on
		xlabel('周期T(s)');
		ylabel('滞回耗能Eh(J/kg)');
		title('弹塑性滞回耗能谱');
        hold on;
    elseif(iy==2)
        figure(11)
		plot(per(2:sp),um(2:sp),'kh-.') %绘制出弹塑性位移延性反应谱；
        hold on;
        figure(12)
        %%%输出数据到硬盘；
        save('e:\jiji_steel\a20\ttem_a20_2.txt','rm','-ASCII')
		plot(per,rm,'kh-.') %绘制出累积滞回耗能谱；
        hold on;
    elseif(iy==3)
        figure(11)
		plot(per(2:sp),um(2:sp),'ko-.') %绘制出弹塑性位移延性反应谱；
        hold on;
        figure(12)
        %%%输出数据到硬盘；
        save('e:\jiji_steel\a20\ttem_a20_3.txt','rm','-ASCII')
		plot(per,rm,'ko-.') %绘制出累积滞回耗能谱；
        hold on;
    elseif(iy==4)
        figure(11)
 		plot(per(2:sp),um(2:sp),'kp-.') %绘制出弹塑性位移延性反应谱；
        hold on;
        figure(12)
       %%%输出数据到硬盘；
        save('e:\jiji_steel\a20\ttem_a20_4.txt','rm','-ASCII')
		plot(per,rm,'kp-.') %绘制出累积滞回耗能谱；
        hold on;
    else
        figure(11)
		plot(per(2:sp),um(2:sp),'ks-.') %绘制出弹塑性位移延性反应谱；
        hold on;
        figure(12)
        %%%输出数据到硬盘；
        save('e:\jiji_steel\a20\ttem_a20_5.txt','rm','-ASCII')
		plot(per,rm,'ks-.') %绘制出累积滞回耗能谱；
        hold on;
    end       
end